isupper

isupper() and islower() both are the in- built methods in Python which works with the strings.

isupper()和islower()都是Python中的内置方法，可与字符串一起使用。

1)字符串isupper()方法 (1) String isupper() Method)

isupper() returns "true" if all characters of the string are uppercase character.

如果字符串的所有字符均为大写字符，则isupper()返回“ true”。

Syntax:

句法：

 String.isupper()

Parameter: None

参数：无

Return type:

返回类型：

• true - if all characters of the string are uppercase characters.

  true-如果字符串的所有字符均为大写字符。

• false - if any of the characters is not in uppercase character.

  false-如果任何字符都不大写。

Example:

例：

# str1 with all uppercase characters
str1 = "GOOGLE"
print str1.isupper()
# str2 with uppercase character, DOT, SPACE
str2 = "GOOGLE.COM"
print str2.isupper()
# str3 with uppercase and lowercase characters
str3 ="GOOGLE.com"
print str3.isupper()
# str4 with all lowercase characters
str4 = "google.com"
print str4.isupper()

Output

输出量

    True
True
False
False

2)字符串islower()方法 (2) String islower() Method)

islower() returns "true" if all characters of the string are lowercase character.

如果字符串的所有字符均为小写字符，则islower()返回“ true”。

Syntax:

句法：

 String.islower()

Parameter: None

参数：无

Return type:

返回类型：

• true - if all characters of the string are lowercase characters.

  true-如果字符串的所有字符均为小写字符。

• false - if any of the characters is not in lowercase character.

  false-如果任何字符都不是小写字符。

Example:

例：

# str1 with all lowercase characters
str1 = "google"
print str1.islower()
# str2 with lowercase character, DOT, SPACE
str2 = "google.com"
print str2.islower()
# str3 with lowercase and uppercase characters
str3 ="google.COM"
print str3.islower()
# str4 with all uppercase characters
str4 = "GOOGLE.COM"
print str4.islower()

Output

输出量

    True
True
False
False

翻译自: https://www.includehelp.com/python/string-isupper-and-islower-methods-with-examples.aspx

isupper