numpy.char.zfill#
- char.zfill(a, width)[source]#
Return the numeric string left-filled with zeros. A leading sign prefix (
+
/-
) is handled by inserting the padding after the sign character rather than before.- Parameters:
- aarray-like, with
StringDType
,bytes_
, orstr_
dtype - widtharray_like, with any integer dtype
Width of string to left-fill elements in a.
- aarray-like, with
- Returns:
- outndarray
Output array of
StringDType
,bytes_
orstr_
dtype, depending on input type
See also
Examples
>>> import numpy as np >>> np.strings.zfill(['1', '-1', '+1'], 3) array(['001', '-01', '+01'], dtype='<U3')