ee' d4 Z? ee' d5 Z@ ee' d6 ZA ee' d7 ZBd8 ZC eeC d9 ZDd`d:ZE eeE dad; ZF ee' d< ZGd`d=ZH eeH d`d> ZId? ZJ eeJ d@ ZKd`dAZL eeL d`dB ZM ee1 dcdC ZN ee1 dcdD ZO eeE dadE ZP eeJ dF ZQdbdGZR eeR dbdH ZSd`dIZH eeH d`dJ ZT eeR dbdK ZUd`dLZV eeV d`dM ZWdbdNZX eeX dcdO ZY eeH d`dP ZZ ee' dQ Z[ ee' dR Z\d`dSZ] ee] d`dT Z^ ee' dU Z_dV Z` ee` dW Za ee' dX Zb ee' dY Zc edZ G d[ d\e
Zd ed
ded^ Z ed
dfd_ ZedS )gan
This module contains a set of functions for vectorized string
operations and methods.
.. note::
The `chararray` class exists for backwards compatibility with
Numarray, it is not recommended for new development. Starting from numpy
1.4, if one needs arrays of strings, it is recommended to use arrays of
`dtype` `object_`, `bytes_` or `str_`, and use the free functions
in the `numpy.char` module for fast vectorized string operations.
Some methods will only be available if the corresponding string method is
available in your version of Python.
The preferred alias for `defchararray` is `numpy.char`.
N )
set_module )bytes_str_integerint_object_bool_ character)ndarraycompare_chararraysarray) _vec_string) overrides)asbytes)3equal not_equal
greater_equal
less_equalgreaterlessstr_lenaddmultiplymod
capitalizecentercountdecodeencodeendswith
expandtabsfindindexisalnumisalphaisdigitislowerisspaceistitleisupperjoinljustlowerlstrip partitionreplacerfindrindexrjust
rpartitionrsplitrstripsplit
splitlines
startswithstripswapcasetitle translateupperzfill isnumeric isdecimalr asarrayz
numpy.char)modulec t | t s1t t j | j j t rdS dS )zReturns True if arr is a string or a string array with a dtype that
represents a unicode string, otherwise returns False.
TF)
isinstancestr
issubclassnumpyrE dtypetype)arrs N/opt/cloudlinux/venv/lib64/python3.11/site-packages/numpy/core/defchararray.py _is_unicoderP 1 sB
3 u}S))/4c : :t 5 c t j | }t |dd }|:| t | t
| d S |S )z
Helper function to cast a result back into an array
with the appropriate dtype if an object array must be used
as an intermediary.
rL NF)copy)rK rE tolistgetattrastyperM _get_num_chars)resultoutput_dtype_likeretrL s rO _to_bytes_or_str_arrayr[ < sf -
(
(C %w 5 5E zz+$u++nS&9&9::zGGG JrQ c F g }| D ]}| n| | |S )a!
Helper function for delegating arguments to Python string
functions.
Many of the Python string operations that have optional arguments
do not use 'None' to indicate a default value. In these cases,
we need to remove all None arguments, and those following them.
)append)argsnewargschks rO _clean_argsra I s< G ; Es NrQ c b t | j j t r
| j dz S | j S )z
Helper function that returns the number of characters per field in
a string or unicode array. This is to abstract out the fact that
for a unicode array this is itemsize / 4.
)rJ rL rM r itemsizeas rO rW rW Y s. !',%% zQ :rQ c
| |fS N x1x2s rO _binary_op_dispatcherrm d s 8OrQ c & t | |dd S )a
Return (x1 == x2) element-wise.
Unlike `numpy.equal`, this comparison is performed by first
stripping whitespace characters from the end of the string. This
behavior is provided for backward-compatibility with numarray.
Parameters
----------
x1, x2 : array_like of str or unicode
Input arrays of the same shape.
Returns
-------
out : ndarray
Output array of bools.
See Also
--------
not_equal, greater_equal, less_equal, greater, less
z==Tr rj s rO r r h . b"dD 1 11rQ c & t | |dd S )a
Return (x1 != x2) element-wise.
Unlike `numpy.not_equal`, this comparison is performed by first
stripping whitespace characters from the end of the string. This
behavior is provided for backward-compatibility with numarray.
Parameters
----------
x1, x2 : array_like of str or unicode
Input arrays of the same shape.
Returns
-------
out : ndarray
Output array of bools.
See Also
--------
equal, greater_equal, less_equal, greater, less
z!=Tro rj s rO r r rp rQ c & t | |dd S )a
Return (x1 >= x2) element-wise.
Unlike `numpy.greater_equal`, this comparison is performed by
first stripping whitespace characters from the end of the string.
This behavior is provided for backward-compatibility with
numarray.
Parameters
----------
x1, x2 : array_like of str or unicode
Input arrays of the same shape.
Returns
-------
out : ndarray
Output array of bools.
See Also
--------
equal, not_equal, less_equal, greater, less
z>=Tro rj s rO r r s 0 b"dD 1 11rQ c & t | |dd S )a
Return (x1 <= x2) element-wise.
Unlike `numpy.less_equal`, this comparison is performed by first
stripping whitespace characters from the end of the string. This
behavior is provided for backward-compatibility with numarray.
Parameters
----------
x1, x2 : array_like of str or unicode
Input arrays of the same shape.
Returns
-------
out : ndarray
Output array of bools.
See Also
--------
equal, not_equal, greater_equal, greater, less
z<=Tro rj s rO r r rp rQ c & t | |dd S )a
Return (x1 > x2) element-wise.
Unlike `numpy.greater`, this comparison is performed by first
stripping whitespace characters from the end of the string. This
behavior is provided for backward-compatibility with numarray.
Parameters
----------
x1, x2 : array_like of str or unicode
Input arrays of the same shape.
Returns
-------
out : ndarray
Output array of bools.
See Also
--------
equal, not_equal, greater_equal, less_equal, less
>Tro rj s rO r r . b"c4 0 00rQ c & t | |dd S )a
Return (x1 < x2) element-wise.
Unlike `numpy.greater`, this comparison is performed by first
stripping whitespace characters from the end of the string. This
behavior is provided for backward-compatibility with numarray.
Parameters
----------
x1, x2 : array_like of str or unicode
Input arrays of the same shape.
Returns
-------
out : ndarray
Output array of bools.
See Also
--------
equal, not_equal, greater_equal, less_equal, greater
>> a = np.array(['Grace Hopper Conference', 'Open Source Day'])
>>> np.char.str_len(a)
array([23, 15])
>>> a = np.array([u'Р', u'о'])
>>> np.char.str_len(a)
array([1, 1])
>>> a = np.array([['hello', 'world'], [u'Р', u'о']])
>>> np.char.str_len(a)
array([[5, 5], [1, 1]])
__len__)r r re s rO r r s B q$ * **rQ c t j | }t j | }t | t | z }t |j t |j k r t d|j d|j d t
| t |j | d|f S )a
Return element-wise string concatenation for two arrays of str or unicode.
Arrays `x1` and `x2` must have the same shape.
Parameters
----------
x1 : array_like of str or unicode
Input array.
x2 : array_like of str or unicode
Input array.
Returns
-------
add : ndarray
Output array of `bytes_` or `str_`, depending on input types
of the same shape as `x1` and `x2`.
zLnp.char.add() requires both arrays of the same dtype kind, but got dtypes: 'z' and 'zJ' (the few cases where this used to work often lead to incorrect results).__add__)rK rE rW rM rL TypeErrorr )rk rl arr1arr2out_sizes rO r r - s * = D = D d##nT&:&::H DJ4
++++
H J
H
H/3z
H
H
HI I I
t -T$* - -h 7 7TG L LLrQ c | fS rh ri )rf is rO _multiply_dispatcherr S r{ rQ c t j | }t j | }t |j j t
st
d t | t t | d z }t | t |j | d|f S )a
Return (a * i), that is string multiple concatenation,
element-wise.
Values in `i` of less than 0 are treated as 0 (which yields an
empty string).
Parameters
----------
a : array_like of str or unicode
i : array_like of ints
Returns
-------
out : ndarray
Output array of str or unicode, depending on input types
Examples
--------
>>> a = np.array(["a", "b", "c"])
>>> np.char.multiply(x, 3)
array(['aaa', 'bbb', 'ccc'], dtype='>> i = np.array([1, 2, 3])
>>> np.char.multiply(a, i)
array(['a', 'bb', 'ccc'], dtype='>> np.char.multiply(np.array(['a']), i)
array(['a', 'aa', 'aaa'], dtype='>> a = np.array(['a', 'b', 'c', 'd', 'e', 'f']).reshape((2, 3))
>>> np.char.multiply(a, 3)
array([['aaa', 'bbb', 'ccc'],
['ddd', 'eee', 'fff']], dtype='>> np.char.multiply(a, i)
array([['a', 'bb', 'ccc'],
['d', 'ee', 'fff']], dtype='>> c = np.array(['a1b2','1b2a','b2a1','2a1b'],'S4'); c
array(['a1b2', '1b2a', 'b2a1', '2a1b'],
dtype='|S4')
>>> np.char.capitalize(c)
array(['A1b2', '1b2a', 'B2a1', '2a1b'],
dtype='|S4')
r rK rE r rL rf r s rO r r s( F
M! E uek< 8 88rQ c | fS rh ri rf widthfillchars rO _center_dispatcherr r{ rQ c b t j | }t j | }t t j |j }t j |j t j rt | }t | t |j | d||f S )a\
Return a copy of `a` with its elements centered in a string of
length `width`.
Calls `str.center` element-wise.
Parameters
----------
a : array_like of str or unicode
width : int
The length of the resulting strings
fillchar : str or unicode, optional
The padding character to use (default is space).
Returns
-------
out : ndarray
Output array of str or unicode, depending on input
types
See Also
--------
str.center
Notes
-----
This function is intended to work with arrays of strings. The
fill character is not applied to numeric types.
Examples
--------
>>> c = np.array(['a1b2','1b2a','b2a1','2a1b']); c
array(['a1b2', '1b2a', 'b2a1', '2a1b'], dtype='>> np.char.center(c, width=9)
array([' a1b2 ', ' 1b2a ', ' b2a1 ', ' 2a1b '], dtype='>> np.char.center(c, width=9, fillchar='*')
array(['***a1b2**', '***1b2a**', '***b2a1**', '***2a1b**'], dtype='>> np.char.center(c, width=1)
array(['a', '1', 'b', '2'], dtype='>> c = np.array(['aAaAaA', ' aA ', 'abBABba'])
>>> c
array(['aAaAaA', ' aA ', 'abBABba'], dtype='>> np.char.count(c, 'A')
array([3, 1, 1])
>>> np.char.count(c, 'aA')
array([3, 1, 0])
>>> np.char.count(c, 'A', start=1, end=4)
array([2, 1, 1])
>>> np.char.count(c, 'A', start=1, end=3)
array([1, 0, 0])
r r r ra r s rO r r
s* V q$#u C8H8H)H I IIrQ c | fS rh ri rf encodingerrorss rO _code_dispatcherr 8 r{ rQ c f t t | t dt || S )a
Calls ``bytes.decode`` element-wise.
The set of available codecs comes from the Python standard library,
and may be extended at runtime. For more information, see the
:mod:`codecs` module.
Parameters
----------
a : array_like of str or unicode
encoding : str, optional
The name of an encoding
errors : str, optional
Specifies how to handle encoding errors
Returns
-------
out : ndarray
See Also
--------
:py:meth:`bytes.decode`
Notes
-----
The type of the result will depend on the encoding specified.
Examples
--------
>>> c = np.array([b'\x81\xc1\x81\xc1\x81\xc1', b'@@\x81\xc1@@',
... b'\x81\x82\xc2\xc1\xc2\x82\x81'])
>>> c
array([b'\x81\xc1\x81\xc1\x81\xc1', b'@@\x81\xc1@@',
... b'\x81\x82\xc2\xc1\xc2\x82\x81'], dtype='|S7')
>>> np.char.decode(c, encoding='cp037')
array(['aAaAaA', ' aA ', 'abBABba'], dtype='>> s = np.array(['foo', 'bar'])
>>> s[0] = 'foo'
>>> s[1] = 'bar'
>>> s
array(['foo', 'bar'], dtype='>> np.char.endswith(s, 'ar')
array([False, True])
>>> np.char.endswith(s, 'a', start=1, end=2)
array([False, True])
r# r r ra r s rO r# r# s4 P 5*vuo C0@0@ @ B B BrQ c | fS rh ri rf tabsizes rO _expandtabs_dispatcherr r{ rQ c N t t | t d|f | S )aS
Return a copy of each string element where all tab characters are
replaced by one or more spaces.
Calls `str.expandtabs` element-wise.
Return a copy of each string element where all tab characters are
replaced by one or more spaces, depending on the current column
and the given `tabsize`. The column number is reset to zero after
each newline occurring in the string. This doesn't understand other
non-printing characters or escape sequences.
Parameters
----------
a : array_like of str or unicode
Input array
tabsize : int, optional
Replace tabs with `tabsize` number of spaces. If not given defaults
to 8 spaces.
Returns
-------
out : ndarray
Output array of str or unicode, depending on input type
See Also
--------
str.expandtabs
r$ r r s rO r$ r$ s, @ "Aw wj991 > > >rQ c T t | t d||gt | z S )a3
For each element, return the lowest index in the string where
substring `sub` is found.
Calls `str.find` element-wise.
For each element, return the lowest index in the string where
substring `sub` is found, such that `sub` is contained in the
range [`start`, `end`].
Parameters
----------
a : array_like of str or unicode
sub : str or unicode
start, end : int, optional
Optional arguments `start` and `end` are interpreted as in
slice notation.
Returns
-------
out : ndarray or int
Output array of ints. Returns -1 if `sub` is not found.
See Also
--------
str.find
Examples
--------
>>> a = np.array(["NumPy is a Python library"])
>>> np.char.find(a, "Python", start=0, end=None)
array([11])
r% r r s rO r% r% s1 L 4#u C(8(88 : : :rQ c T t | t d||gt | z S )a
Like `find`, but raises `ValueError` when the substring is not found.
Calls `str.index` element-wise.
Parameters
----------
a : array_like of str or unicode
sub : str or unicode
start, end : int, optional
Returns
-------
out : ndarray
Output array of ints. Returns -1 if `sub` is not found.
See Also
--------
find, str.find
Examples
--------
>>> a = np.array(["Computer Science"])
>>> np.char.index(a, "Science", start=0, end=None)
array([9])
r& r r s rO r& r& s0 > 43,S)9)99 ; ; ;rQ c . t | t d S )a
Returns true for each element if all characters in the string are
alphanumeric and there is at least one character, false otherwise.
Calls `str.isalnum` element-wise.
For 8-bit strings, this method is locale-dependent.
Parameters
----------
a : array_like of str or unicode
Returns
-------
out : ndarray
Output array of str or unicode, depending on input type
See Also
--------
str.isalnum
r' r r re s rO r' r' 3 . q% + ++rQ c . t | t d S )a
Returns true for each element if all characters in the string are
alphabetic and there is at least one character, false otherwise.
Calls `str.isalpha` element-wise.
For 8-bit strings, this method is locale-dependent.
Parameters
----------
a : array_like of str or unicode
Returns
-------
out : ndarray
Output array of bools
See Also
--------
str.isalpha
r( r re s rO r( r( M r rQ c . t | t d S )a
Returns true for each element if all characters in the string are
digits and there is at least one character, false otherwise.
Calls `str.isdigit` element-wise.
For 8-bit strings, this method is locale-dependent.
Parameters
----------
a : array_like of str or unicode
Returns
-------
out : ndarray
Output array of bools
See Also
--------
str.isdigit
Examples
--------
>>> a = np.array(['a', 'b', '0'])
>>> np.char.isdigit(a)
array([False, False, True])
>>> a = np.array([['a', 'b', '0'], ['c', '1', '2']])
>>> np.char.isdigit(a)
array([[False, False, True], [False, True, True]])
r) r re s rO r) r) g s @ q% + ++rQ c . t | t d S )a
Returns true for each element if all cased characters in the
string are lowercase and there is at least one cased character,
false otherwise.
Calls `str.islower` element-wise.
For 8-bit strings, this method is locale-dependent.
Parameters
----------
a : array_like of str or unicode
Returns
-------
out : ndarray
Output array of bools
See Also
--------
str.islower
r* r re s rO r* r* 0 q% + ++rQ c . t | t d S )a
Returns true for each element if there are only whitespace
characters in the string and there is at least one character,
false otherwise.
Calls `str.isspace` element-wise.
For 8-bit strings, this method is locale-dependent.
Parameters
----------
a : array_like of str or unicode
Returns
-------
out : ndarray
Output array of bools
See Also
--------
str.isspace
r+ r re s rO r+ r+ r rQ c . t | t d S )a
Returns true for each element if the element is a titlecased
string and there is at least one character, false otherwise.
Call `str.istitle` element-wise.
For 8-bit strings, this method is locale-dependent.
Parameters
----------
a : array_like of str or unicode
Returns
-------
out : ndarray
Output array of bools
See Also
--------
str.istitle
r, r re s rO r, r, r rQ c . t | t d S )a
Return true for each element if all cased characters in the
string are uppercase and there is at least one character, false
otherwise.
Call `str.isupper` element-wise.
For 8-bit strings, this method is locale-dependent.
Parameters
----------
a : array_like of str or unicode
Returns
-------
out : ndarray
Output array of bools
See Also
--------
str.isupper
Examples
--------
>>> str = "GHC"
>>> np.char.isupper(str)
array(True)
>>> a = np.array(["hello", "HELLO", "Hello"])
>>> np.char.isupper(a)
array([False, True, False])
r- r re s rO r- r- s D q% + ++rQ c
| |fS rh ri sepseqs rO _join_dispatcherr s :rQ c N t t | t d|f | S )a=
Return a string which is the concatenation of the strings in the
sequence `seq`.
Calls `str.join` element-wise.
Parameters
----------
sep : array_like of str or unicode
seq : array_like of str or unicode
Returns
-------
out : ndarray
Output array of str or unicode, depending on input types
See Also
--------
str.join
Examples
--------
>>> np.char.join('-', 'osd')
array('o-s-d', dtype='>> np.char.join(['-', '.'], ['ghc', 'osd'])
array(['g-h-c', 'o.s.d'], dtype=' "C&3&113 8 8 8rQ c | fS rh ri r s rO _just_dispatcherr ' r{ rQ c b t j | }t j | }t t j |j }t j |j t j rt | }t | t |j | d||f S )a
Return an array with the elements of `a` left-justified in a
string of length `width`.
Calls `str.ljust` element-wise.
Parameters
----------
a : array_like of str or unicode
width : int
The length of the resulting strings
fillchar : str or unicode, optional
The character to use for padding
Returns
-------
out : ndarray
Output array of str or unicode, depending on input type
See Also
--------
str.ljust
r/ r r s rO r/ r/ + 6
M! E
e$$I uy (( ) )D U\22 %8$$
tEK &&)X1F H H HrQ c V t j | }t ||j d S )ag
Return an array with the elements converted to lowercase.
Call `str.lower` element-wise.
For 8-bit strings, this method is locale-dependent.
Parameters
----------
a : array_like, {str, unicode}
Input array.
Returns
-------
out : ndarray, {str, unicode}
Output array of str or unicode, depending on input type
See Also
--------
str.lower
Examples
--------
>>> c = np.array(['A1B C', '1BCA', 'BCA1']); c
array(['A1B C', '1BCA', 'BCA1'], dtype='>> np.char.lower(c)
array(['a1b c', '1bca', 'bca1'], dtype='
M! E uek7 3 33rQ c | fS rh ri rf charss rO _strip_dispatcherr r r{ rQ c Z t j | }t ||j d|f S )am
For each element in `a`, return a copy with the leading characters
removed.
Calls `str.lstrip` element-wise.
Parameters
----------
a : array-like, {str, unicode}
Input array.
chars : {str, unicode}, optional
The `chars` argument is a string specifying the set of
characters to be removed. If omitted or None, the `chars`
argument defaults to removing whitespace. The `chars` argument
is not a prefix; rather, all combinations of its values are
stripped.
Returns
-------
out : ndarray, {str, unicode}
Output array of str or unicode, depending on input type
See Also
--------
str.lstrip
Examples
--------
>>> c = np.array(['aAaAaA', ' aA ', 'abBABba'])
>>> c
array(['aAaAaA', ' aA ', 'abBABba'], dtype='>> np.char.lstrip(c, 'a')
array(['AaAaA', ' aA ', 'bBABba'], dtype='>> np.char.lstrip(c, 'A') # leaves c unchanged
array(['aAaAaA', ' aA ', 'abBABba'], dtype='>> (np.char.lstrip(c, ' ') == np.char.lstrip(c, '')).all()
... # XXX: is this a regression? This used to return True
... # np.char.lstrip(c,'') does not modify c at all.
False
>>> (np.char.lstrip(c, ' ') == np.char.lstrip(c, None)).all()
True
r1 r rf r r s rO r1 r1 v s, f
M! E uek8eX > >>rQ c | fS rh ri rf r s rO _partition_dispatcherr r{ rQ c N t t | t d|f | S )aU
Partition each element in `a` around `sep`.
Calls `str.partition` element-wise.
For each element in `a`, split the element as the first
occurrence of `sep`, and return 3 strings containing the part
before the separator, the separator itself, and the part after
the separator. If the separator is not found, return 3 strings
containing the string itself, followed by two empty strings.
Parameters
----------
a : array_like, {str, unicode}
Input array
sep : {str, unicode}
Separator to split each string element in `a`.
Returns
-------
out : ndarray, {str, unicode}
Output array of str or unicode, depending on input type.
The output array will have an extra dimension with 3
elements per input element.
See Also
--------
str.partition
r2 r r s rO r2 r2 s, @ "Aw cV44a 9 9 9rQ c | fS rh ri rf oldnewr s rO _replace_dispatcherr r{ rQ c p t t | t d||gt | z | S )a
For each element in `a`, return a copy of the string with all
occurrences of substring `old` replaced by `new`.
Calls `str.replace` element-wise.
Parameters
----------
a : array-like of str or unicode
old, new : str or unicode
count : int, optional
If the optional argument `count` is given, only the first
`count` occurrences are replaced.
Returns
-------
out : ndarray
Output array of str or unicode, depending on input type
See Also
--------
str.replace
Examples
--------
>>> a = np.array(["That is a mango", "Monkeys eat mangos"])
>>> np.char.replace(a, 'mango', 'banana')
array(['That is a banana', 'Monkeys eat bananas'], dtype='>> a = np.array(["The dish is fresh", "This is it"])
>>> np.char.replace(a, 'is', 'was')
array(['The dwash was fresh', 'Thwas was it'], dtype=' J "Aw C: E8J8J+JKKQ P P PrQ c T t | t d||gt | z S )a.
For each element in `a`, return the highest index in the string
where substring `sub` is found, such that `sub` is contained
within [`start`, `end`].
Calls `str.rfind` element-wise.
Parameters
----------
a : array-like of str or unicode
sub : str or unicode
start, end : int, optional
Optional arguments `start` and `end` are interpreted as in
slice notation.
Returns
-------
out : ndarray
Output array of ints. Return -1 on failure.
See Also
--------
str.rfind
r4 r r s rO r4 r4 s0 : 43,S)9)99 ; ; ;rQ c T t | t d||gt | z S )ax
Like `rfind`, but raises `ValueError` when the substring `sub` is
not found.
Calls `str.rindex` element-wise.
Parameters
----------
a : array-like of str or unicode
sub : str or unicode
start, end : int, optional
Returns
-------
out : ndarray
Output array of ints.
See Also
--------
rfind, str.rindex
r5 r r s rO r5 r5 # s0 4 4C<+c*:*:: < < >> c = np.array(['aAaAaA', 'abBABba'], dtype='S7'); c
array(['aAaAaA', 'abBABba'],
dtype='|S7')
>>> np.char.rstrip(c, b'a')
array(['aAaAaA', 'abBABb'],
dtype='|S7')
>>> np.char.rstrip(c, b'A')
array(['aAaAa', 'abBABba'],
dtype='|S7')
r9 r r s rO r9 r9 s, R
M! E uek8eX > >>rQ c R t | t d|gt | z S )a6
For each element in `a`, return a list of the words in the
string, using `sep` as the delimiter string.
Calls `str.split` element-wise.
Parameters
----------
a : array_like of str or unicode
sep : str or unicode, optional
If `sep` is not specified or None, any whitespace string is a
separator.
maxsplit : int, optional
If `maxsplit` is given, at most `maxsplit` splits are done.
Returns
-------
out : ndarray
Array of list objects
See Also
--------
str.split, rsplit
r: r r s rO r: r: s. > 7GcU[%:%: : < < >> c = np.array(['aAaAaA', ' aA ', 'abBABba'])
>>> c
array(['aAaAaA', ' aA ', 'abBABba'], dtype='>> np.char.strip(c)
array(['aAaAaA', 'aA', 'abBABba'], dtype='>> np.char.strip(c, 'a') # 'a' unstripped from c[1] because whitespace leads
array(['AaAaA', ' aA ', 'bBABb'], dtype='>> np.char.strip(c, 'A') # 'A' unstripped from c[1] because (unprinted) ws trails
array(['aAaAa', ' aA ', 'abBABba'], dtype='>> c=np.array(['a1B c','1b Ca','b Ca1','cA1b'],'S5'); c
array(['a1B c', '1b Ca', 'b Ca1', 'cA1b'],
dtype='|S5')
>>> np.char.swapcase(c)
array(['A1b C', '1B cA', 'B cA1', 'Ca1B'],
dtype='|S5')
r> r r s rO r> r> z s( D
M! E uek: 6 66rQ c V t j | }t ||j d S )a
Return element-wise title cased version of string or unicode.
Title case words start with uppercase characters, all remaining cased
characters are lowercase.
Calls `str.title` element-wise.
For 8-bit strings, this method is locale-dependent.
Parameters
----------
a : array_like, {str, unicode}
Input array.
Returns
-------
out : ndarray
Output array of str or unicode, depending on input type
See Also
--------
str.title
Examples
--------
>>> c=np.array(['a1b c','1b ca','b ca1','ca1b'],'S5'); c
array(['a1b c', '1b ca', 'b ca1', 'ca1b'],
dtype='|S5')
>>> np.char.title(c)
array(['A1B C', '1B Ca', 'B Ca1', 'Ca1B'],
dtype='|S5')
r? r r s rO r? r? s( H
M! E uek7 3 33rQ c | fS rh ri )rf table deletecharss rO _translate_dispatcherr r{ rQ c t j | }t |j j t
rt
||j d|f S t
||j d|gt | z S )a,
For each element in `a`, return a copy of the string where all
characters occurring in the optional argument `deletechars` are
removed, and the remaining characters have been mapped through the
given translation table.
Calls `str.translate` element-wise.
Parameters
----------
a : array-like of str or unicode
table : str of length 256
deletechars : str
Returns
-------
out : ndarray
Output array of str or unicode, depending on input type
See Also
--------
str.translate
r@ )rK rE rJ rL rM r r ra )rf r r r s rO r@ r@ s{ 8
M! E%+"D)) Q 5; eX7 7 7 5; eW{;7O7O-OQ Q QrQ c V t j | }t ||j d S )ah
Return an array with the elements converted to uppercase.
Calls `str.upper` element-wise.
For 8-bit strings, this method is locale-dependent.
Parameters
----------
a : array_like, {str, unicode}
Input array.
Returns
-------
out : ndarray, {str, unicode}
Output array of str or unicode, depending on input type
See Also
--------
str.upper
Examples
--------
>>> c = np.array(['a1b c', '1bca', 'bca1']); c
array(['a1b c', '1bca', 'bca1'], dtype='>> np.char.upper(c)
array(['A1B C', '1BCA', 'BCA1'], dtype='>> np.char.isnumeric(['123', '123abc', '9.0', '1/4', 'VIII'])
array([ True, False, False, False, False])
z:isnumeric is only available for Unicode strings and arraysrC rP r r r re s rO rC rC 7 s5 @ q>> VTUUU q% - --rQ c j t | st d t | t d S )a
For each element, return True if there are only decimal
characters in the element.
Calls `str.isdecimal` element-wise.
Decimal characters include digit characters, and all characters
that can be used to form decimal-radix numbers,
e.g. ``U+0660, ARABIC-INDIC DIGIT ZERO``.
Parameters
----------
a : array_like, unicode
Input array.
Returns
-------
out : ndarray, bool
Array of booleans identical in shape to `a`.
See Also
--------
str.isdecimal
Examples
--------
>>> np.char.isdecimal(['12345', '4.99', '123ABC', ''])
array([ True, False, False, False])
z:isdecimal is only available for Unicode strings and arraysrD r
re s rO rD rD \ s> @ q>> J HJ J J q% - --rQ rK c e Zd ZdZ dAdZd Zd Zd
Zd Zd Z d
Z
d Z d Z d Z
d Zd Zd Zd Zd ZdBdZej j e_ d ZdCdZdDdZdEd ZdEd ZdDd ZdFd ZdDd!Z dDd"Z d# Z d$ Z d% Z d& Z!d' Z"d( Z#d) Z$d* Z%dCd+Z&d, Z'dGd-Z(d. Z)dGd/Z*dDd0Z+dDd1Z,dCd2Z-d3 Z.dEd4Z/dGd5Z0dEd6Z1dGd7Z2dDd8Z3dGd9Z4d: Z5d; Z6dGd<Z7d= Z8d> Z9d? Z:d@ Z;dS )H chararraya
chararray(shape, itemsize=1, unicode=False, buffer=None, offset=0,
strides=None, order=None)
Provides a convenient view on arrays of string and unicode values.
.. note::
The `chararray` class exists for backwards compatibility with
Numarray, it is not recommended for new development. Starting from numpy
1.4, if one needs arrays of strings, it is recommended to use arrays of
`dtype` `object_`, `bytes_` or `str_`, and use the free functions
in the `numpy.char` module for fast vectorized string operations.
Versus a regular NumPy array of type `str` or `unicode`, this
class adds the following functionality:
1) values automatically have whitespace removed from the end
when indexed
2) comparison operators automatically remove whitespace from the
end when comparing values
3) vectorized string operations are provided as methods
(e.g. `.endswith`) and infix operators (e.g. ``"+", "*", "%"``)
chararrays should be created using `numpy.char.array` or
`numpy.char.asarray`, rather than this constructor directly.
This constructor creates the array, using `buffer` (with `offset`
and `strides`) if it is not ``None``. If `buffer` is ``None``, then
constructs a new array with `strides` in "C order", unless both
``len(shape) >= 2`` and ``order='F'``, in which case `strides`
is in "Fortran order".
Methods
-------
astype
argsort
copy
count
decode
dump
dumps
encode
endswith
expandtabs
fill
find
flatten
getfield
index
isalnum
isalpha
isdecimal
isdigit
islower
isnumeric
isspace
istitle
isupper
item
join
ljust
lower
lstrip
nonzero
put
ravel
repeat
replace
reshape
resize
rfind
rindex
rjust
rsplit
rstrip
searchsorted
setfield
setflags
sort
split
splitlines
squeeze
startswith
strip
swapaxes
swapcase
take
title
tofile
tolist
tostring
translate
transpose
upper
view
zfill
Parameters
----------
shape : tuple
Shape of the array.
itemsize : int, optional
Length of each array element, in number of characters. Default is 1.
unicode : bool, optional
Are the array elements of type unicode (True) or string (False).
Default is False.
buffer : object exposing the buffer interface or str, optional
Memory address of the start of the array data. Default is None,
in which case a new array is created.
offset : int, optional
Fixed stride displacement from the beginning of an axis?
Default is 0. Needs to be >=0.
strides : array_like of ints, optional
Strides for the array (see `ndarray.strides` for full description).
Default is None.
order : {'C', 'F'}, optional
The order in which the array data is stored in memory: 'C' ->
"row major" order (the default), 'F' -> "column major"
(Fortran) order.
Examples
--------
>>> charar = np.chararray((3, 3))
>>> charar[:] = 'a'
>>> charar
chararray([[b'a', b'a', b'a'],
[b'a', b'a', b'a'],
[b'a', b'a', b'a']], dtype='|S1')
>>> charar = np.chararray(charar.shape, itemsize=5)
>>> charar[:] = 'abc'
>>> charar
chararray([[b'abc', b'abc', b'abc'],
[b'abc', b'abc', b'abc'],
[b'abc', b'abc', b'abc']], dtype='|S5')
r FNr Cc |rt }nt }t | }t |t r|} d }nd } da|t
j | |||f| }
n t
j | |||f|||| }
| | |
d< da|
S )Nr order)bufferoffsetstridesr .r )r r r rH rI
_globalvarr
__new__) subtypeshaperd unicoder r r r rL fillerselfs rO r zchararray.__new__ s EEE
x== fc " " FFFF
>?7EE83D).0 0 0DD ?7EE83D*0*0').0 0 0D DI
rQ c R t s | j j dvrt d d S d S )NSUbcz-Can only create a chararray from string data.)r rL charr )r objs rO __array_finalize__z chararray.__array_finalize__2 s: NdjoV ; ; LMM M N N ; ;rQ c t j | | }t |t r,| }t | dk rd}n|}|S )Nr )r
__getitem__rH r r9 len)r r" valtemps rO r& zchararray.__getitem__7 sS !$,, c9 % % ::<= other) element-wise.
See Also
--------
greater_equal
)r r+ s rO __ge__zchararray.__ge__\ s T5)))rQ c " t | | S )zl
Return (self <= other) element-wise.
See Also
--------
less_equal
)r r+ s rO __le__zchararray.__le__f s $&&&rQ c " t | | S )zh
Return (self > other) element-wise.
See Also
--------
greater
)r r+ s rO __gt__zchararray.__gt__p s tU###rQ c " t | | S )ze
Return (self < other) element-wise.
See Also
--------
less
)r r+ s rO __lt__zchararray.__lt__z s D% rQ c < t t | | S )z
Return (self + other), that is string concatenation,
element-wise for a pair of array_likes of str or unicode.
See Also
--------
add
)rE r r+ s rO r zchararray.__add__ s s4''(((rQ c ` t t t j | | S )z
Return (other + self), that is string concatenation,
element-wise for a pair of array_likes of `bytes_` or `str_`.
See Also
--------
add
)rE r rK r+ s rO __radd__zchararray.__radd__ s& s5=//66777rQ c < t t | | S z
Return (self * i), that is string multiple concatenation,
element-wise.
See Also
--------
multiply
rE r r r s rO r zchararray.__mul__ xa(()))rQ c < t t | | S r< r= r> s rO __rmul__zchararray.__rmul__ r? rQ c < t t | | S )z
Return (self % i), that is pre-Python 2.6 string formatting
(interpolation), element-wise for a pair of array_likes of `bytes_`
or `str_`.
See Also
--------
mod
)rE r r> s rO r zchararray.__mod__ s s4||$$$rQ c t S rh )NotImplementedr+ s rO __rmod__zchararray.__rmod__ s rQ c T | ||| S )a
Return the indices that sort the array lexicographically.
For full documentation see `numpy.argsort`, for which this method is
in fact merely a "thin wrapper."
Examples
--------
>>> c = np.array(['a1b c', '1b ca', 'b ca1', 'Ca1b'], 'S5')
>>> c = c.view(np.chararray); c
chararray(['a1b c', '1b ca', 'b ca1', 'Ca1b'],
dtype='|S5')
>>> c[c.argsort()]
chararray(['1b ca', 'Ca1b', 'a1b c', 'b ca1'],
dtype='|S5')
) __array__argsort)r axiskindr s rO rI zchararray.argsort s& $ ~~ ''dE:::rQ c : t t | S )z
Return a copy of `self` with only the first character of each element
capitalized.
See Also
--------
char.capitalize
)rE r r s rO r zchararray.capitalize s z$''(((rQ r c > t t | || S )z
Return a copy of `self` with its elements centered in a
string of length `width`.
See Also
--------
center
)rE r r r r s rO r zchararray.center s vdE844555rQ c & t | ||| S )z
Returns an array with the number of non-overlapping occurrences of
substring `sub` in the range [`start`, `end`].
See Also
--------
char.count
)r r r r r s rO r zchararray.count s T3s+++rQ c $ t | || S )zn
Calls ``bytes.decode`` element-wise.
See Also
--------
char.decode
)r! r r r s rO r! zchararray.decode dHf---rQ c $ t | || S )zj
Calls `str.encode` element-wise.
See Also
--------
char.encode
)r" rS s rO r" zchararray.encode rT rQ c & t | ||| S )z
Returns a boolean array which is `True` where the string element
in `self` ends with `suffix`, otherwise `False`.
See Also
--------
char.endswith
)r# )r r r r s rO r# zchararray.endswith
s feS111rQ r c < t t | | S )z
Return a copy of each string element where all tab characters are
replaced by one or more spaces.
See Also
--------
char.expandtabs
)rE r$ )r r s rO r$ zchararray.expandtabs s z$00111rQ c & t | ||| S )z
For each element, return the lowest index in the string where
substring `sub` is found.
See Also
--------
char.find
)r% rQ s rO r% zchararray.find% s D#uc***rQ c & t | ||| S )z
Like `find`, but raises `ValueError` when the substring is not found.
See Also
--------
char.index
)r& rQ s rO r& zchararray.index1 s T3s+++rQ c t | S )z
Returns true for each element if all characters in the string
are alphanumeric and there is at least one character, false
otherwise.
See Also
--------
char.isalnum
)r' rM s rO r' zchararray.isalnum< t}} rQ c t | S )z
Returns true for each element if all characters in the string
are alphabetic and there is at least one character, false
otherwise.
See Also
--------
char.isalpha
)r( rM s rO r( zchararray.isalphaI r[ rQ c t | S )z
Returns true for each element if all characters in the string are
digits and there is at least one character, false otherwise.
See Also
--------
char.isdigit
)r) rM s rO r) zchararray.isdigitV t}} rQ c t | S )z
Returns true for each element if all cased characters in the
string are lowercase and there is at least one cased character,
false otherwise.
See Also
--------
char.islower
)r* rM s rO r* zchararray.islowerb r[ rQ c t | S )z
Returns true for each element if there are only whitespace
characters in the string and there is at least one character,
false otherwise.
See Also
--------
char.isspace
)r+ rM s rO r+ zchararray.isspaceo r[ rQ c t | S )z
Returns true for each element if the element is a titlecased
string and there is at least one character, false otherwise.
See Also
--------
char.istitle
)r, rM s rO r, zchararray.istitle| r^ rQ c t | S )z
Returns true for each element if all cased characters in the
string are uppercase and there is at least one character, false
otherwise.
See Also
--------
char.isupper
)r- rM s rO r- zchararray.isupper r[ rQ c " t | | S )z
Return a string which is the concatenation of the strings in the
sequence `seq`.
See Also
--------
char.join
)r. )r r s rO r. zchararray.join s D# rQ c > t t | || S )z
Return an array with the elements of `self` left-justified in a
string of length `width`.
See Also
--------
char.ljust
)rE r/ rO s rO r/ zchararray.ljust uT5(33444rQ c : t t | S )z
Return an array with the elements of `self` converted to
lowercase.
See Also
--------
char.lower
)rE r0 rM s rO r0 zchararray.lower uT{{###rQ c < t t | | S )z
For each element in `self`, return a copy with the leading characters
removed.
See Also
--------
char.lstrip
)rE r1 r r s rO r1 zchararray.lstrip vdE**+++rQ c < t t | | S )zu
Partition each element in `self` around `sep`.
See Also
--------
partition
)rE r2 r r s rO r2 zchararray.partition s ys++,,,rQ c @ t t | ||| S )z
For each element in `self`, return a copy of the string with all
occurrences of substring `old` replaced by `new`.
See Also
--------
char.replace
)rE r3 )r r r r s rO r3 zchararray.replace s wtS#u55666rQ c & t | ||| S )z
For each element in `self`, return the highest index in the string
where substring `sub` is found, such that `sub` is contained
within [`start`, `end`].
See Also
--------
char.rfind
)r4 rQ s rO r4 zchararray.rfind s T3s+++rQ c & t | ||| S )z
Like `rfind`, but raises `ValueError` when the substring `sub` is
not found.
See Also
--------
char.rindex
)r5 rQ s rO r5 zchararray.rindex s dC,,,rQ c > t t | || S )z
Return an array with the elements of `self`
right-justified in a string of length `width`.
See Also
--------
char.rjust
)rE r6 rO s rO r6 zchararray.rjust re rQ c < t t | | S )zv
Partition each element in `self` around `sep`.
See Also
--------
rpartition
)rE r7 rl s rO r7 zchararray.rpartition
s z$,,---rQ c $ t | || S )z
For each element in `self`, return a list of the words in
the string, using `sep` as the delimiter string.
See Also
--------
char.rsplit
)r8 r r r s rO r8 zchararray.rsplit
s dC***rQ c < t t | | S )z
For each element in `self`, return a copy with the trailing
characters removed.
See Also
--------
char.rstrip
)rE r9 ri s rO r9 zchararray.rstrip
rj rQ c $ t | || S )z
For each element in `self`, return a list of the words in the
string, using `sep` as the delimiter string.
See Also
--------
char.split
)r: rs s rO r: zchararray.split"
s T3)))rQ c " t | | S )z
For each element in `self`, return a list of the lines in the
element, breaking at line boundaries.
See Also
--------
char.splitlines
)r; )r r s rO r; zchararray.splitlines.
s $)))rQ c & t | ||| S )z
Returns a boolean array which is `True` where the string element
in `self` starts with `prefix`, otherwise `False`.
See Also
--------
char.startswith
)r< )r r r r s rO r< zchararray.startswith:
s $s333rQ c < t t | | S )z
For each element in `self`, return a copy with the leading and
trailing characters removed.
See Also
--------
char.strip
)rE r= ri s rO r= zchararray.stripF
uT5))***rQ c : t t | S )z
For each element in `self`, return a copy of the string with
uppercase characters converted to lowercase and vice versa.
See Also
--------
char.swapcase
)rE r> rM s rO r> zchararray.swapcaseR
s x~~&&&rQ c : t t | S )z
For each element in `self`, return a titlecased version of the
string: words start with uppercase characters, all remaining cased
characters are lowercase.
See Also
--------
char.title
)rE r? rM s rO r? zchararray.title^
s uT{{###rQ c > t t | || S )aB
For each element in `self`, return a copy of the string where
all characters occurring in the optional argument
`deletechars` are removed, and the remaining characters have
been mapped through the given translation table.
See Also
--------
char.translate
)rE r@ )r r r s rO r@ zchararray.translatek
s yuk::;;;rQ c : t t | S )z
Return an array with the elements of `self` converted to
uppercase.
See Also
--------
char.upper
)rE rA rM s rO rA zchararray.uppery
rg rQ c < t t | | S )z
Return the numeric string left-filled with zeros in a string of
length `width`.
See Also
--------
char.zfill
)rE rB )r r s rO rB zchararray.zfill
ry rQ c t | S )z
For each element in `self`, return True if there are only
numeric characters in the element.
See Also
--------
char.isnumeric
)rC rM s rO rC zchararray.isnumeric
rQ c t | S )z
For each element in `self`, return True if there are only
decimal characters in the element.
See Also
--------
char.isdecimal
)rD rM s rO rD zchararray.isdecimal
r rQ )r FNr Nr )rF NNr r NNNr rh )<__name__
__module__ __qualname____doc__r r# r& r- r/ r1 r3 r5 r7 r r: r rA r rE rI r
r r r r! r" r# r$ r% r& r' r( r) r* r+ r, r- r. r/ r0 r1 r2 r3 r4 r5 r6 r7 r8 r9 r: r; r< r= r> r? r@ rA rB rC rD ri rQ rO r r s J JV CG.1! ! ! !FN N N
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rQ r Tc t | t t f rS|t | t rd}nd}|t | }t | |z }t |||| | S t | t
t f rt j | } t | t r,t | j j t r t | t s| t } |+| j }t | j j t r|dz }|$t | j j t rd}nd}|rt }nt" }|t j | | } |s9|| j k s.|st | t s|r9t | t" r$| |t' | f } | S t | t r5t | j j t( r|| } |rt }nt" }|t- | ||d }nt- | ||f|d }| t S )a
Create a `chararray`.
.. note::
This class is provided for numarray backward-compatibility.
New code (not concerned with numarray compatibility) should use
arrays of type `bytes_` or `str_` and use the free functions
in :mod:`numpy.char ` for fast
vectorized string operations instead.
Versus a regular NumPy array of type `str` or `unicode`, this
class adds the following functionality:
1) values automatically have whitespace removed from the end
when indexed
2) comparison operators automatically remove whitespace from the
end when comparing values
3) vectorized string operations are provided as methods
(e.g. `str.endswith`) and infix operators (e.g. ``+, *, %``)
Parameters
----------
obj : array of str or unicode-like
itemsize : int, optional
`itemsize` is the number of characters per scalar in the
resulting array. If `itemsize` is None, and `obj` is an
object array or a Python list, the `itemsize` will be
automatically determined. If `itemsize` is provided and `obj`
is of type str or unicode, then the `obj` string will be
chunked into `itemsize` pieces.
copy : bool, optional
If true (default), then the object is copied. Otherwise, a copy
will only be made if __array__ returns a copy, if obj is a
nested sequence, or if a copy is needed to satisfy any of the other
requirements (`itemsize`, unicode, `order`, etc.).
unicode : bool, optional
When true, the resulting `chararray` can contain Unicode
characters, when false only 8-bit characters. If unicode is
None and `obj` is one of the following:
- a `chararray`,
- an ndarray of type `str` or `unicode`
- a Python str or unicode object,
then the unicode setting of the output array will be
automatically determined.
order : {'C', 'F', 'A'}, optional
Specify the order of the array. If order is 'C' (default), then the
array will be in C-contiguous order (last-index varies the
fastest). If order is 'F', then the returned array
will be in Fortran-contiguous order (first-index varies the
fastest). If order is 'A', then the returned array may
be in any order (either C-, Fortran-contiguous, or even
discontiguous).
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Convert the input to a `chararray`, copying the data only if
necessary.
Versus a regular NumPy array of type `str` or `unicode`, this
class adds the following functionality:
1) values automatically have whitespace removed from the end
when indexed
2) comparison operators automatically remove whitespace from the
end when comparing values
3) vectorized string operations are provided as methods
(e.g. `str.endswith`) and infix operators (e.g. ``+``, ``*``,``%``)
Parameters
----------
obj : array of str or unicode-like
itemsize : int, optional
`itemsize` is the number of characters per scalar in the
resulting array. If `itemsize` is None, and `obj` is an
object array or a Python list, the `itemsize` will be
automatically determined. If `itemsize` is provided and `obj`
is of type str or unicode, then the `obj` string will be
chunked into `itemsize` pieces.
unicode : bool, optional
When true, the resulting `chararray` can contain Unicode
characters, when false only 8-bit characters. If unicode is
None and `obj` is one of the following:
- a `chararray`,
- an ndarray of type `str` or 'unicode`
- a Python str or unicode object,
then the unicode setting of the output array will be
automatically determined.
order : {'C', 'F'}, optional
Specify the order of the array. If order is 'C' (default), then the
array will be in C-contiguous order (last-index varies the
fastest). If order is 'F', then the returned array
will be in Fortran-contiguous order (first-index varies the
fastest).
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