How to Copy a List in Python and Check for Lowercase Letters?

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To copy a list in Python and check for lowercase letters, you can use list comprehension to create a new list that contains only the lowercase letters from the original list. Here’s an example:

original_list = ['a', 'B', 'c', 'D', 'e']
lowercase_list = [x for x in original_list if x.islower()]
copied_list = original_list.copy()

In this example, we first create a new list called lowercase_list using list comprehension. The list comprehension checks each element in the original_list and only includes the lowercase letters in the new list. We then create a shallow copy of the original_list using the copy() method and assign it to the copied_list variable.

If you want to check for uppercase letters instead of lowercase letters, you can use the isupper() method instead of islower().

Keep in mind that when you use indexing or slicing to copy a list, you are creating a shallow copy, which means that any mutable objects, such as other lists or dictionaries, will be passed by reference, and any changes made to them in the copied list will also affect the original list. If you want to create a deep copy of a list that contains mutable objects, you can use the copy module’s deepcopy() function, as I have explained in a previous answer.

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