Error: cannot import name 'pi'

Question

for some reason I'm getting an error when I try to import pi in my code. For example, I'll create a file in Text Wrangler with the following code:

from math import pi

print(pi * 2)

When I run the code in Terminal, I get the error:

Traceback (most recent call last):
  File "ex.py", line 1, in <module>
    from math import pi
ImportError: cannot import name 'pi'

This just seems very weird to me, and through some research I've read a bit about circular dependencies but I don't think that's really relevant. Any help would be great!

You have file named `math.py` in same directory where `ex.py` is located. — Łukasz Rogalski, Jun 13 '16 at 05:41
Your code works here. Are you sure you don't have a file `math.py` which shadows the real library? — tripleee, Jun 13 '16 at 05:42
@Jake: If you're not sure if you are using the system `math` that everyone here thinks you're not using, could you include the output of `math.__file__`? — Bill Lynch, Jun 13 '16 at 05:49

score 3 · Accepted Answer · edited Jun 13 '16 at 05:49

3

This works well on Python 3.4.3:

>>> from math import pi
>>> pi
3.141592653589793

Check whether you have another module named math by typing pip freeze in terminal, or check if you have a python file named math.py. If you do change its name.

edited Jun 13 '16 at 05:49

tripleee

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answered Jun 13 '16 at 05:46

Doron Cohen

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Error: cannot import name 'pi'

1 Answers1