python - 如何将零填充到字符串？(How to pad zeroes to a string?)

Question

用Python方式填充数字字符串的最左边的方法是在左边添加零，即数字字符串具有特定的长度？

  ask by translate from so

Answer 1

Strings:

(字串：)

>>> n = '4'
>>> print(n.zfill(3))
004

And for numbers:

(对于数字：)

>>> 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

String formatting documentation .

(字符串格式化文档 。)