str.zfill()

str.zfill(width)

Return a copy of the string left filled with ASCII '0' digits to make a string of length width. A leading sign prefix ('+'/'-') is handled by inserting the padding after the sign character rather than before. The original string is returned if width is less than or equal to len(s).

For example:

>>> "42".zfill(5)
'00042'
>>> "-42".zfill(5)
'-0042'

Links:

https://docs.python.org/3.5/library/stdtypes.html#str.zfill

doc_python

2016-10-07 17:43:22

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