1.A = B ? a1:a2
A = (a1, a2)[B == True]
2.List comprehension
a = [i
in range(
10)
if i%
2==
0]
b = [(x,y)
for x
in range(
5)
for y
in range(
3)]
3.read file
with open(filename)
as f:
image_index = [x.strip()
for x
in f.readlines()]
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