numpy.strings.ljust

strings.ljust(a, width, fillchar=' ')[source]

Return an array with the elements of a left-justified 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 character to use for padding (default is space).

Returns:

outndarray

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

See also

str.ljust

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

Try it in your browser!

>>> import numpy as np
>>> c = np.array(['aAaAaA', '  aA  ', 'abBABba'])
>>> np.strings.ljust(c, width=3)
array(['aAaAaA', '  aA  ', 'abBABba'], dtype='<U7')
>>> np.strings.ljust(c, width=9)
array(['aAaAaA   ', '  aA     ', 'abBABba  '], dtype='<U9')

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