Python – Filter String Tuples if String lengths equals K
Given List of tuples, filter tuples, whose element strings have length equal to K.
Input : test_list = [(“ABC”, “Gfg”, “CS1”), (“Gfg”, “Best”), (“Gfg”, “WoOW”)], K = 3
Output : [(‘ABC’, ‘Gfg’, ‘CS1’)]
Explanation : All Strings have length 3 in above tuple.Input : test_list = [(“ABCD”, “Gfg”, “CS1”), (“Gfg”, “Best”), (“Gfg”, “WoOW”)], K = 3
Output : []
Explanation : No Strings have length 3 in above tuples.
Method #1 : Using loop
In this, we run nested loop to test each string, if equals to K, then the tuple is appended to result list, else its omitted.
Python3
# Python3 code to demonstrate working of # Filter String Tuples if String lengths equals K# Using loop # initializing listtest_list = [("ABC", "Gfg", "CS1"), ("Gfg", "Best"), ("Gfg", "WoW")] # printing original listprint("The original list is : " + str(test_list)) # initializing K K = 3 res_list = []for sub in test_list: res = True for ele in sub: # check using len() the lengths if len(ele) != K : res = False break if res: res_list.append(sub) # printing result print("The filtered tuples : " + str(res_list)) |
Output
The original list is : [('ABC', 'Gfg', 'CS1'), ('Gfg', 'Best'), ('Gfg', 'WoW')]
The filtered tuples : [('ABC', 'Gfg', 'CS1'), ('Gfg', 'WoW')]
Method #2 : Using all() + list comprehension
Compacted way, uses all() to check for lengths equivalence and iteration using list comprehension.
Python3
# Python3 code to demonstrate working of # Filter String Tuples if String lengths equals K# Using all() + list comprehension # initializing listtest_list = [("ABC", "Gfg", "CS1"), ("Gfg", "Best"), ("Gfg", "WoW")] # printing original listprint("The original list is : " + str(test_list)) # initializing K K = 3 # all checks for all lengths equals K res = [sub for sub in test_list if all(len(ele) == K for ele in sub)] # printing result print("The filtered tuples : " + str(res)) |
Output
The original list is : [('ABC', 'Gfg', 'CS1'), ('Gfg', 'Best'), ('Gfg', 'WoW')]
The filtered tuples : [('ABC', 'Gfg', 'CS1'), ('Gfg', 'WoW')]
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