While working with strings, their prefixes and suffix play an important role in making any decision. For data manipulation tasks, we may need to sometimes, check if a string ends with any of the matching strings. Let’s discuss certain ways in which this task can be performed.
Method #1 : Using filter() + endswith() The combination of the above function can help to perform this particular task. The filter method is used to check for each word and endswith method tests for the suffix logic at target list.
Python3
# Python3 code to demonstrate# Checking for string match suffix# using filter() + endswith()# initializing stringtest_string = "GfG is best"# initializing suffix listsuff_list = ['best', 'iss', 'good']# printing original stringprint("The original string :"+ str(test_string))# using filter() + endswith()# Checking for string match suffixres = list(filter(test_string.endswith, suff_list)) != []# print resultprint("Does string end with any suffix list sublist ? :"+ str(res)) |
The original string :GfG is best Does string end with any suffix list sublist ? :True
Time Complexity : O(n)
Space Complexity : O(n)
Method #2 : Using endswith() As an improvement to the above method, it is not always necessary to include filter method for comparison. This task can be handled solely by supplying a suffix check list as an argument to endswith method as well.
Python3
# Python3 code to demonstrate# Checking for string match suffix# using endswith()# initializing stringtest_string = "GfG is best"# initializing suffix listsuff_list = ['best', 'iss', 'good']# printing original stringprint("The original string :"+ str(test_string))# using endswith()# Checking for string match suffixres = test_string.endswith(tuple(suff_list))# print resultprint("Does string end with any suffix list sublist ? :"+ str(res)) |
The original string :GfG is best Does string end with any suffix list sublist ? :True
Time Complexity : O(n)
Space Complexity : O(1)
Method #3 : Using split().Splitting the given string and comparing every string of list for matching suffix
Python3
# Python3 code to demonstrate# Checking for string match suffix# initializing resres = False# initializing stringtest_string = "GfG is best"# initializing suffix listsuff_list = ['best', 'iss', 'good']# printing original stringprint("The original string : " + str(test_string))x = test_string.split()for i in suff_list: if(x[-1] == i): res = True# print resultprint("Does string end with any suffix list sublist ? : " + str(res)) |
The original string : GfG is best Does string end with any suffix list sublist ? : True
Time Complexity : O(n)
Space Complexity : O(1)
Method #4 : Using split() and in operator
Python3
# Python3 code to demonstrate# Checking for string match suffix# initializing resres = False# initializing stringtest_string = "GfG is best"# initializing suffix listsuff_list = ['best', 'iss', 'good']# printing original stringprint("The original string : " + str(test_string))x = test_string.split()if x[-1] in suff_list: res=True# print resultprint("Does string end with any suffix list sublist ? : " + str(res)) |
The original string : GfG is best Does string end with any suffix list sublist ? : True
Time Complexity : O(n)
Space Complexity : O(1)
Method #5 : Using find() and len() methods
Python3
# Python3 code to demonstrate# Checking for string match suffix# Initializing resres = False# Initializing stringtest_string = "GfG is best"# Initializing suffix listsuff_list = ['best', 'iss', 'good']# Printing original stringprint("The original string : " + str(test_string))# Using Loopfor i in suff_list: a = test_string.find(i) b = len(test_string)-len(i) if(a == b): res = True# Print resultprint("Does string end with any suffix list sublist ? : " + str(res)) |
The original string : GfG is best Does string end with any suffix list sublist ? : True
Time complexity: O(n * m)
Space complexity: O(1)
Method #6 : Using any()
The any function in Python returns True if any element in an iterable is True, and False otherwise. In this approach, we use a list comprehension to generate a list of boolean values, where each value is True if the test string ends with the current suffix in the list, and False otherwise. The any function is then used to check if any element in the list is True.
Python3
# Python3 code to demonstrate# Checking for string match suffix# initializing stringtest_string = "GfG is best"# initializing suffix listsuffix_list = ['best', 'iss', 'good']# printing original stringprint("The original string :"+ str(test_string))# Use a list comprehension to check if any suffix in the list appears at the end of the test stringresult = any(test_string.endswith(suffix) for suffix in suffix_list)# print resultprint("Does string end with any suffix list sublist ? :"+ str(result))#This code is contributed by Edula Vinay Kumar Reddy |
The original string :GfG is best Does string end with any suffix list sublist ? :True
Time complexity: O(n), where n is the length of the suffix list
Auxiliary space: O(1)
Method 7: using operator.countOf() method
Python3
# Python3 code to demonstrate# Checking for string match suffiximport operator as op# initializing resres = False# initializing stringtest_string = "GfG is best"# initializing suffix listsuff_list = ['best', 'iss', 'good']# printing original stringprint("The original string : " + str(test_string))x = test_string.split()if op.countOf(suff_list, x[-1]) > 0: res = True# print resultprint("Does string end with any suffix list sublist ? : " + str(res)) |
The original string : GfG is best Does string end with any suffix list sublist ? : True
Time Complexity: O(N)
Auxiliary Space : O(1)
Method 8: Using regular expressions
Python3
import re# Initializing stringtest_string = "GfG is best"# Initializing suffix listsuffix_list = ['best', 'iss', 'good']# printing original stringprint("The original string : " + str(test_string))# Initializing boolean flagflag = False# Iterating through suffix listfor suffix in suffix_list: # Using regular expression to check suffix match match = re.search(r'{}$'.format(suffix), test_string) if match: flag = True break# Print resultprint("Does string end with any suffix list sublist ? : " + str(flag))#This code is contributed by Vinay Pinjala. |
The original string : GfG is best Does string end with any suffix list sublist ? : True
Time Complexity: O(N)
Auxiliary Space : O(1)
Method#9: Using Recursive method.
Python3
def check_suffix(string, suffix_list): if not string: return False words = string.split() if not words: return False if words[-1] in suffix_list: return True return check_suffix(" ".join(words[:-1]), suffix_list)# initializing resres = False# initializing stringtest_string = "GfG is best"# initializing suffix listsuff_list = ['best', 'iss', 'good']# printing original stringprint("The original string : " + str(test_string))res = check_suffix(test_string, suff_list)# print resultprint("Does string end with any suffix list sublist ? : " + str(res))#this code contributed by tvsk |
The original string : GfG is best Does string end with any suffix list sublist ? : True
Time Complexity: O(n)
Auxiliary Space: O(n)
