cudf.core.column.string.StringMethods.zfill#

StringMethods.zfill(width: int) SeriesOrIndex#

Pad strings in the Series/Index by prepending ‘0’ characters.

Strings in the Series/Index are padded with ‘0’ characters on the left of the string to reach a total string length width. Strings in the Series/Index with length greater or equal to width are unchanged.

Parameters
widthint

Minimum length of resulting string; strings with length less than width be prepended with ‘0’ characters.

Returns
Series/Index of str dtype

Returns Series or Index with prepended ‘0’ characters.

See also

rjust

Fills the left side of strings with an arbitrary character.

ljust

Fills the right side of strings with an arbitrary character.

pad

Fills the specified sides of strings with an arbitrary character.

center

Fills boths sides of strings with an arbitrary character.

Notes

Differs from str.zfill() which has special handling for ‘+’/’-‘ in the string.

Examples

>>> import cudf
>>> s = cudf.Series(['-1', '1', '1000',  None])
>>> s
0      -1
1       1
2    1000
3    <NA>
dtype: object

Note that None is not string, therefore it is converted to None. The minus sign in '-1' is treated as a regular character and the zero is added to the left of it (str.zfill() would have moved it to the left). 1000 remains unchanged as it is longer than width.

>>> s.str.zfill(3)
0     0-1
1     001
2    1000
3    <NA>
dtype: object