num_sq = ( (x, x ** 2) for x in [1, 2, 3] ) next(num_sq) x = [x2 for x1, x2 in num_sq] code example

Example: x for x in python

# This could be said as:
x for x in thing: 
# Or
for x in thing:
    return x # Or whatever that puts x in some variable

# Same thing, just really dodgy syntax.