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String_slicing.py
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String_slicing.py
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# String slicing in Python to check if a string can become empty by recursive deletion
def is_valid(string, sub_string):
# checking the lengths of string and sub_string
if len(string) > 0 and len(sub_string):
# iterating until string becomes empty
while len(string) > 0:
# finding the sub_string in string
index = string.find(sub_string)
# checking whether its present or not
if index == -1:
# returning false
return False
# removind the sub_string
string = string[0:index] + string[index + len(sub_string):]
# returning True
return True
else:
# returning False
return False
if __name__ == '__main__':
# initializing the string and string
string = 'tutorialstutorialspointpoint'
sub_string = 'tutorialspoint'
# invoking the method
print(is_valid(string, sub_string))