list-comprehension.py

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# Listing those files from the directory that ends with .jpg format

import os 

files=[file for file in os.listdir('D:\\Temp') if file.endswith('.jpg')]
print(files)


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#TO filter those numbers greater than 5

numbers=[numb for numb in [1,2,3,4,5,6,7,8,9,10] if numb>5]
numbers


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# TO list pairs
pairs = [(x, y) for x in range(3) for y in range(3) if x != y]
print(pairs)


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# To list all files 

files=[file for file in os.listdir('D:\\Temp') if file.endswith('.jpg')]
files


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# TO convert a;; of them in upper casing 

file=[f.upper() for f in files]
file

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# To list those files with name length smaller than 8

l5=[file for file in files if len(file)<=8]
l5

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# Write a list comprehension to create a list of the squares of even numbers from 0 to 20.

sqn_num=[n*n for n in range(0,21) if n%2==0]
sqn_num



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# Extract filenames that contain the letter 'a'

file_with_a=[f for f in files if 'a' in f]
file_with_a