numpy.strings.zfill

strings.zfill(a, width)

Return the numeric string left-filled with zeros

Calls str.zfill element-wise.

Parameters:

aarray_like, with StringDType, bytes_ or str_ dtype

Input array.

widthint

Width of string to left-fill elements in a.

Returns:

outndarray

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

See also

str.zfill

Examples

>>> np.strings.zfill('1', 3)
array('001', dtype='<U3')