python format string zero pad
>>> n = '4' >>> print(n.zfill(3)) # 004 >>> n = 4 >>> print(f'{n:03}') # Preferred method, python >= 3.6 #004 >>> print('%03d' % n) #004 >>> print(format(n, '03')) # python >= 2.6 #004 >>> print('{0:03d}'.format(n)) # python >= 2.6 + python 3 #004 >>> print('{foo:03d}'.format(foo=n)) # python >= 2.6 + python 3 #004 >>> print('{:03d}'.format(n)) # python >= 2.7 + python3 #004
