CODEWITHSUNDEEP
python
pyyan
pyyan

Reputation: 103

Python - Adding a string in a data from a list

I'm currently stuck in this right now.

I have a code right here:

words = ["Hello","how","are","you"]
arrlen = len(words)
val1, val2, val3, val4 = words

What I want to do is add ".mp4" in each val1, val2, val3 and val4. Is there any way to achieve this? I have tried val1 + ".mp4", but it does not work.

Upvotes: 1

Views: 42

Answers (3)

user3483203
user3483203

Reputation: 51185

Using a list comprehension:

>>> words = ["Hello","how","are","you"]
>>> words = [x + ".mp4" for x in words]
>>> words
['Hello.mp4', 'how.mp4', 'are.mp4', 'you.mp4']

Upvotes: 2

wencakisa
wencakisa

Reputation: 5968

You can use the built-in map() function.

Directly from the docs:

Returns an iterator that applies function to every item of iterable, yielding the results.

Here the function is a lambda expression instead and maps each element from words with + '.mp4', which is exactly what you want:

words = ['Hello', 'how', 'are', 'you']
words = list(map(lambda s: s + '.mp4', words))
print(words)

Upvotes: 0

Ajax1234
Ajax1234

Reputation: 71471

Mutate each item along with the unpacking:

words = ["Hello","how","are","you"]
arrlen = len(words)
val1, val2, val3, val4 = ["{}.mp4".format(word) for word in words]

Upvotes: 1

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