关于字符串

1. ljust()函数的使用：左对齐

Description:
The method ljust() returns the string left justified(左对齐) in a string of length width. Padding is done using the specified fillchar (default is a space). The original string is returned if width is less than len(s).

Syntax:
Following is the syntax for ljust() method :

str.ljust(width[, fillchar])

Parameters:
- width – This is string length in total after padding.
- fillchar – This is filler character, default is a space.

使用场景：
看个例子就明白了：

>>> print "Brown:".ljust(15), 97Brown:          97>>> print "Richard Lee:".ljust(15), 90Richard Lee:    90

是不是对齐看起来非常美观。