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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