Python – Extract range sized strings

Sometimes, while working with huge amount of data, we can have a problem in which we need to extract just specific range sized strings. This kind of problem can occur during validation cases across many domains. Let’s discuss certain ways to handle this in Python strings list.

Method #1 : Using list comprehension + len()
The combination of above functionalities can be used to perform this task. In this, we iterate for all the strings and return only ranged sized strings checked using len().

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# Python3 code to demonstrate working of
# Range length Strings extraction
# using list comprehension + len()
  
# initialize list 
test_list = ['gfg', 'is', 'best', 'for', 'geeks']
  
# printing original list 
print("The original list : " + str(test_list))
  
# initialize i, j 
i, j = 2, 3
  
# Range length Strings extraction
# using list comprehension + len()
res = [ele for ele in test_list if len(ele) >= i and len(ele) <= j]
  
# printing result
print("The range sized strings are : " + str(res))

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Output :

The original list : ['gfg', 'is', 'best', 'for', 'geeks']
The range sized strings are : ['gfg', 'is', 'for']

 

Method #2 : Using filter() + lambda
The combination of above functionalities can be used to perform this task. In this, we extract the elements using filter() and logic is compiled in a lambda function.

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# Python3 code to demonstrate working of
# Range length Strings extraction
# using filter() + lambd
  
# initialize list 
test_list = ['gfg', 'is', 'best', 'for', 'geeks']
  
# printing original list 
print("The original list : " + str(test_list))
  
# initialize i, j
i, j = 2, 3
  
# Range length Strings extraction
# using filter() + lambda
res = list(filter(lambda ele: len(ele) >= i and len(ele) <= j, test_list))
  
# printing result
print("The range sized strings are : " + str(res))

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Output :

The original list : ['gfg', 'is', 'best', 'for', 'geeks']
The range sized strings are : ['gfg', 'is', 'for']



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