In [58]: "in".center(6)#设置字符串为6个字节并且居中，多出的留空，
Out[58]: ‘ in ‘
In [59]: "in".center(6,"0")#设置字符串为6个字节并且居中，多出的以‘0’填充
Out[59]: ‘00in00‘
In [70]: "c".rjust(3,‘l‘)#设置字符串长度为3并且右对齐，空出来的用‘l’填充
Out[70]: ‘llc‘
In [71]: "t".ljust(3,‘o‘)#设置字符串长度为3并且左对齐，空出来的用‘o’填充
Out[71]: ‘too‘
In [169]: "oh".zfill(10)#设置字符串的长度为0并且靠右对齐，多出的以‘0’填充 Out[169]: ‘00000000oh‘
In [49]: "window".strip("w")#清除左右两边的字母‘w’
Out[49]: ‘indo‘
In [54]: "-------window-----".strip("-")#清除左右两边的‘-’
Out[54]: ‘window‘
In [55]: " window ".strip()#默认清除空格
Out[55]: ‘window‘In [152]: " in ".rstrip()#清除右边的空格
Out[152]: ‘ in‘In [153]: " in ".lstrip()#清除左边的空格
Out[153]: ‘in ‘
原文：https://www.cnblogs.com/daiguangkun/p/8997635.html