Python字符串 lower() 方法

Python String lower()方法将字符串中的所有大写字符转换为小写字符并返回。

Syntax: 

string.lower()

Parameters: 

The lower() method doesn’t take any parameters. 

Returns: 

Returns a lowercase string of the given string

示例 1 ：只有字母字符的字符串

Python3

# Python3 program to show the
# working of lower() function
text = 'GeEks FOR geeKS'
 
print("Original String:")
print(text)
 
# lower() function to convert
# string to lower_case
print("\nConverted String:")
print(text.lower())

输出：

Original String:
GeEks FOR geeKS

Converted string:
geeks for geeks

示例2：带有字母数字字符的字符串

Python3

# Python3 program to show the
# working of lower() function
text = 'G3Ek5 F0R gE3K5'
 
print("Original String:")
print(text)
 
# lower() function to convert
# string to lower_case
print("\nConverted String:")
print(text.lower())

输出：

Original String:
G3Ek5 F0R gE3K5

Converted String:
g3ek5 f0r ge3k5

示例 3

lower() 方法的常见应用之一是检查两个字符串是否相同。

Python3

# Python3 program to show the
# working of lower() function
text1 = 'GEEKS For GEEKS'
 
text2 = 'gEeKS fOR GeeKs'
 
# Comparison of strings using
# lower() method
if(text1.lower() == text2.lower()):
    print("Strings are same")
else:
    print("Strings are not same")

输出：

Strings are same