Python()中的字符串rjust()和ljust()

1. String rjust() 字符串 rjust()方法在将给定字符替换为原始字符串。

句法：

string.rjust(length, fillchar)

参数：

length: length of the modified string. If length is less than or equal to the length of the original string then original string is returned.
fillchar: (optional) characters which needs to be padded. If it’s not provided, space is taken as a default argument.

回报：

Returns a new string of given length after substituting a given character in left side of original string.

例子

# Python program to demonstrate working of 
# rjust()
string = 'geeks'
length = 8
  
# If no fill character is provided, space
# is used as fill character
print(string.rjust(length))

输出：

geeks

例子

# example string
string = 'geeks'
length = 8
fillchar = '*'
  
print(string.rjust(length, fillchar))

输出：

***geeks  

2. 字符串 ljust()
字符串ljust()方法在替换原始字符串右侧的给定字符后返回给定长度的新字符串。

句法：

string.ljust(length, fillchar)

参数：

length: length of the modified string. If length is less than or equal to the length of the original string then original string is returned.
fillchar: (optional) characters which needs to be padded. If it’s not provided, space is taken as a default argument.

回报：

Returns a new string of given length after substituting a given character in right side of original string.

示例 1

# example string
string = 'geeks'
length = 8
  
# If no fill character is provided, space
# is used as fill character.
print(string.ljust(length))

输出：（geeks后面打印三个空格）

geeks   

示例 2

# example string
string = 'geeks'
length = 8
fillchar = '*'
  
# print left justified string
print(string.ljust(length, fillchar))

输出：

geeks***