lstrip(a, chars=None)

Calls :None:None:`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

For each element in a, return a copy with the leading characters removed.

See Also

str.lstrip

Examples

>>> c = np.array(['aAaAaA', '  aA  ', 'abBABba'])
... c
array(['aAaAaA', '  aA  ', 'abBABba'], dtype='<U7')

The 'a' variable is unstripped from c[1] because whitespace leading.

>>> np.char.lstrip(c, 'a')
array(['AaAaA', '  aA  ', 'bBABba'], dtype='<U7')

>>> np.char.lstrip(c, 'A') # leaves c unchanged
array(['aAaAaA', '  aA  ', 'abBABba'], dtype='<U7')

>>> (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

See :

Back References

The following pages refer to to this document either explicitly or contain code examples using this.

numpy.core.defchararray.chararray.lstrip

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GitHub : /numpy/core/defchararray.py#1043
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