Python字符串 isupper() 方法

Python String isupper() 方法返回字符串中的所有字符是否都是大写的。

Syntax:

string.isupper()

Parameters:

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

Returns:

True if all the letters in the string are in the upper case and False if even one of them is in the lower case. 

示例 1：演示 isupper() 的工作原理

Python3

# Python3 code to demonstrate
# working of isupper()
 
# initializing string
isupp_str = "GEEKSFORGEEKS"
not_isupp = "Geeksforgeeks"
 
# Checking which string is
# completely uppercase
print ("Is GEEKSFORGEEKS full uppercase ? : " + str(isupp_str.isupper()))
print ("Is Geeksforgeeks full uppercase ? : " + str(not_isupp.isupper()))

输出：

Is GEEKSFORGEEKS full uppercase ? : True
Is Geeksforgeeks full uppercase ? : False

示例 2：实际应用

这个函数可以有多种使用方式，有很多实际应用。一种这样的应用程序用于检查大写，检查缩写（通常是大写），检查需要所有大写的句子的正确性。下面演示的是一个小例子，展示了 isupper() 方法的应用。

Python3

# Python3 code to demonstrate
# application of isupper()
 
# checking for abbreviations.
# short form of work/phrase
test_str = "Cyware is US based MNC and works in IOT technology"
 
# splitting string
list_str = test_str.split()
 
count = 0
 
# counting upper cases
for i in list_str:
    if (i.isupper()):
        count = count + 1
 
# printing abbreviations count
print ("Number of abbreviations in this sentence is : " + str(count))

输出：

Number of abbreviations in this sentence is : 3