Sometimes, while working with Python, we can have a problem in which we have data in which we need to perform processing and then pass the data forward. One way to process is to remove a stray 0 that may get attached to a string while data transfer. Lets discuss certain ways in which this task can be performed.
Method #1 : Using lstrip()
+ list comprehension
This is one of the one liner with the help of which this task can be performed. In this, we strip the leading 0 using lstrip and the extension of logic to list is done using list comprehension.
# Python3 code to demonstrate # Remove leading 0 from Strings List # using lstrip() + list comprehension # Initializing list test_list = [ '012' , '03' , '044' , '09' ] # printing original list print ( "The original list is : " + str (test_list)) # Remove leading 0 from Strings List # using lstrip() + list comprehension res = [ele.lstrip( '0' ) for ele in test_list] # printing result print ( "The string list after leading 0 removal : " + str (res)) |
The original list is : ['012', '03', '044', '09'] The string list after leading 0 removal : ['12', '3', '44', '9']
Method #2 : Using startswith()
+ loop + list slicing
This is one of the way in which this task can be performed. In this, we check for initial 0 using startswith() and then list slicing is used to remake string excluding 0.
# Python3 code to demonstrate # Remove leading 0 from Strings List # using startswith() + loop + list slicing # Initializing list test_list = [ '012' , '03' , '044' , '09' ] # printing original list print ( "The original list is : " + str (test_list)) # Remove leading 0 from Strings List # using startswith() + loop + list slicing for idx in range ( len (test_list)): if test_list[idx].startswith( '0' ): test_list[idx] = test_list[idx][ 1 :] # printing result print ( "The string list after leading 0 removal : " + str (test_list)) |
The original list is : ['012', '03', '044', '09'] The string list after leading 0 removal : ['12', '3', '44', '9']
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