Merge Two Lists in Python

In Python, concatenating two lists means combining them into a single list. There are a few ways to achieve this. Here's a detailed explanation with examples:

Using the + Operator

list1 = [1, 2, 3] list2 = [4, 5, 6] concatenated_list = list1 + list2 print(concatenated_list) # Output: [1, 2, 3, 4, 5, 6]

You can simply use the + operator to concatenate two lists, resulting in a new list that includes all elements from both lists.

Using the extend() Method

list1 = [1, 2, 3] list2 = [4, 5, 6] list1.extend(list2) print(list1) # Output: [1, 2, 3, 4, 5, 6]

The extend() method modifies the first list by adding all elements from the second list to it.


How To Concatenate Multiple Lists In Python

Using List Slicing

list1 = [1, 2, 3] list2 = [4, 5, 6] list1[len(list1):] = list2 print(list1) # Output: [1, 2, 3, 4, 5, 6]

This method is less commonly used, but it involves using list slicing to append the elements of the second list to the end of the first list.

Using List Comprehension

list1 = [1, 2, 3] list2 = [4, 5, 6] concatenated_list = [item for sublist in [list1, list2] for item in sublist] print(concatenated_list) # Output: [1, 2, 3, 4, 5, 6]

List comprehension can also be used to concatenate lists by iterating over each sublist and its elements.

Conclusion

Merging two lists in Python involves combining their elements into a single list. This can be achieved using the + operator, the extend() method, list slicing, or list comprehension, each offering distinct approaches to achieving the same outcome.






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