Python · Modules & Packages

This is valid Python. Why? from math import ( sin, cos, tan, sinh, cosh, ) And why can't you wrap a plain import the same way?

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After import math, why does calling sin(math.pi) (without the math. prefix) raise NameError?

What does this print? ``` import math as m print(m.sqrt(9)) print(math.sqrt(9)) ```

What does this print? ``` pi = 1234 from math import * print(pi) ```

When you do from somemod import *, which of a module's names are NOT imported by default?

Why is from os import * considered an anti-pattern even though it saves typing the os. prefix?

What does this print? ``` import mymod # prints "loading" on import import mymod import mymod ``` (mymod has a top-level `print("loading")`)

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