fun_with_lambdas.md

First some boilerplate:

def side_effecty_id(x):
        print(x)
        return x

Now, consider:

lambdas_0 = tuple((lambda x: x >= side_effecty_id(i)) for i in range(10))
tuple(l(5) for l in lambdas_0)

Curiously, this gives

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(False, False, False, False, False, False, False, False, False, False)

while

lambdas_1 = tuple((lambda i: lambda x: x >= side_effecty_id(i))(i) for i in range(10))
tuple(l(5) for l in lambdas_1)

gives

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(True, True, True, True, True, True, False, False, False, False)