numpy.char.center

char.center(a, width, fillchar=' ')[source]

Return a copy of a with its elements centered in a string of length width.

Parameters:

aarray-like, with StringDType, bytes_, or str_ dtype

widtharray_like, with any integer dtype

The length of the resulting strings, unless width < str_len(a).

fillchararray-like, with StringDType, bytes_, or str_ dtype

Optional padding character to use (default is space).

Returns:

outndarray

Output array of StringDType, bytes_ or str_ dtype, depending on input types

See also

str.center

Notes

While it is possible for a and fillchar to have different dtypes, passing a non-ASCII character in fillchar when a is of dtype “S” is not allowed, and a ValueError is raised.

Examples

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>>> import numpy as np
>>> c = np.array(['a1b2','1b2a','b2a1','2a1b']); c
array(['a1b2', '1b2a', 'b2a1', '2a1b'], dtype='<U4')
>>> np.strings.center(c, width=9)
array(['   a1b2  ', '   1b2a  ', '   b2a1  ', '   2a1b  '], dtype='<U9')
>>> np.strings.center(c, width=9, fillchar='*')
array(['***a1b2**', '***1b2a**', '***b2a1**', '***2a1b**'], dtype='<U9')
>>> np.strings.center(c, width=1)
array(['a1b2', '1b2a', 'b2a1', '2a1b'], dtype='<U4')

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