Python | Merge list elements

Python | Merge list elements

Merging elements of a list in Python can mean different things depending on the context. Here are several common scenarios:

1. Concatenate Strings in a List

Example:

Given:

lst = ["Hello", "world", "Python", "rocks"]

Desired output:

"HelloworldPythonrocks"

Implementation:

merged_string = ''.join(lst) print(merged_string)

2. Sum Numbers in a List

Example:

Given:

lst = [1, 2, 3, 4, 5]

Desired output:

15

Implementation:

total = sum(lst) print(total)

3. Merge Adjacent Elements in a List

Example:

Given:

lst = [1, 2, 3, 4, 5]

Desired output:

[3, 7, 5]

Implementation:

merged_list = [sum(lst[i:i+2]) for i in range(0, len(lst), 2)] print(merged_list)

4. Flatten Nested Lists

Example:

Given:

lst = [[1, 2], [3, 4], [5, 6]]

Desired output:

[1, 2, 3, 4, 5, 6]

Implementation:

Using list comprehension:

flattened_list = [item for sublist in lst for item in sublist] print(flattened_list)

Using itertools.chain:

import itertools flattened_list = list(itertools.chain.from_iterable(lst)) print(flattened_list)

Depending on the structure and type of the elements in your list, and your desired output, you would opt for one of the methods mentioned above.

More Tags

adjacency-matrix finance has-many-through android-pageradapter mac-catalyst attention-model lyx apache-spark-mllib aforge c#-4.0

More Programming Guides

Other Guides

More Programming Examples