I am trying to loop through a list of strings and replace any occurrence of a specific character, like '1', with a word. However, I'm puzzled as to why my current code is not working.
for x in list_of_strings:
x.replace('1', 'Ace')
Just a heads up, the strings in the list are more than one character long ('1 of Spades').
If you want to transform all strings in a list by replacing '1' with 'Ace', you can utilize a list comprehension:
new_list = [x.replace('1', 'Ace') for x in original_list]
In Python, this approach is quite common and efficient. Whether you modify the original list directly or create a new list, the time complexity will still be O(n).
The reason your initial code did not work as expected is because the str.replace method does not modify the string in place; it returns a copy instead, as explained in the official documentation. One way to update the original list can be done through iterating over indices:
for i in range(len(original_list)):
original_list[i] = original_list[i].replace('1', 'Ace')
Alternatively, you can make use of the enumerate function:
for idx, value in enumerate(original_list):
original_list[idx] = value.replace('1', 'Ace')
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