squares = [] for x in range(10): squares.append(x**2)
squares = [x**2 for x in range(10)]
numbers = [] for x in range(100): if x % 3 == 0: numbers.append(x)
numbers = [x for x in range(100) if x % 3 == 0]
noprimes = [] for i in range(2, 8): for j in range(i*2, 50, i): noprimes.append(j) primes = [] for x in range(2, 50): if x not in noprimes: primes.append(x)
noprimes = [j for i in range(2, 8) for j in range(i*2, 50, i)] primes = [x for x in range(2, 50) if x not in noprimes]
noprimes = set(j for i in range(2, 8) for j in range(i*2, 50, i)) primes = [x for x in range(2, 50) if x not in noprimes]
matrix = [[0,1,2,3], [4,5,6,7], [8,9,10,11]]
flattened = [] for row in matrix: for i in row: flattened.append(i)
flattened = [i for row in matrix for i in row]
from random import random results = [] for x in range(10): results.append(int(round(random())))
from random import random results = [int(round(random())) for x in range(10)]
sentence = 'Your mother was a hamster'
vowels = 'aeiou' non_list = [] for l in sentence: if not l in vowels: non_list.append(l) nonvowels = ''.join(non_list)
vowels = 'aeiou' nonvowels = ''.join([l for l in sentence if not l in vowels])
vowels = 'aeiou' nonvowels = ''.join(l for l in sentence if not l in vowels)
import os
files = []
for f in os.listdir('./my_dir'):
if f.endswith('.txt'):
files.append(f)
import os
files = [f for f in os.listdir('./my_dir') if f.endswith('.txt')]
import os
files = [os.path.join('./my_dir', f) for f in os.listdir('./my_dir') if f.endswith('.txt')]
import csv
data = []
for x in csv.DictReader(open('file.csv', 'rU')):
data.append(x)
import csv
data = [ x for x in csv.DictReader(open('file.csv', 'rU'))]
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