Python中字符串对齐方法介绍

string.ljust(s, width[, fillchar])
string.rjust(s, width[, fillchar])
string.center(s, width[, fillchar])

In [6]: a='Hello!'

In [7]: print a.ljust(10,'+')
Hello!++++

In [8]: print a.rjust(10,'+')
++++Hello!

In [9]: print a.center(10,'+')
++Hello!++