Python – 过滤相似的大小写字符串

给定字符串列表，任务是编写一个Python程序来过滤所有具有相似大小写的字符串，无论是大写还是小写。

例子：

Input : test_list = [“GFG”, “Geeks”, “best”, “FOr”, “all”, “GEEKS”] 
Output : [‘GFG’, ‘best’, ‘all’, ‘GEEKS’] 
Explanation : GFG is all uppercase, best is all lowercase.

Input : test_list = [“GFG”, “Geeks”, “best”] 
Output : [‘GFG’, ‘best’] 
Explanation : GFG is all uppercase, best is all lowercase. 
 

方法 #1：使用islower() + isupper() +列表理解

在这里，我们使用 islower() 和 isupper() 检查每个字符串是小写还是大写，并且使用列表理解来遍历字符串。

Python3

# Python3 code to demonstrate working of
# Filter Similar Case Strings
# Using islower() + isupper() + list comprehension
  
# initializing Matrix
test_list = ["GFG", "Geeks", 
             "best", "FOr", "all", "GEEKS"]
               
# printing original list
print("The original list is : " + str(test_list))
  
# islower() and isupper() used to check for cases
res = [sub for sub in test_list if sub.islower() or sub.isupper()]
  
# printing result
print("Strings with same case : " + str(res))

输出：

The original list is : [‘GFG’, ‘Geeks’, ‘best’, ‘FOr’, ‘all’, ‘GEEKS’]
Strings with same case : [‘GFG’, ‘best’, ‘all’, ‘GEEKS’]

方法#2：使用islower() + isupper() + filter() + lambda

在此，我们使用 filter() 和 lambda函数执行过滤字符串的任务。其余所有功能与上述方法类似。

蟒蛇3

# Python3 code to demonstrate working of
# Filter Similar Case Strings
# Using islower() + isupper() + filter() + lambda
  
# initializing Matrix
test_list = ["GFG", "Geeks", "best",
             "FOr", "all", "GEEKS"]
               
# printing original list
print("The original list is : " + str(test_list))
  
# islower() and isupper() used to check for cases
# filter() and lambda function used for filtering
res = list(filter(lambda sub : sub.islower() or sub.isupper(), test_list))
  
# printing result
print("Strings with same case : " + str(res))

输出：

The original list is : [‘GFG’, ‘Geeks’, ‘best’, ‘FOr’, ‘all’, ‘GEEKS’]
Strings with same case : [‘GFG’, ‘best’, ‘all’, ‘GEEKS’]