trouble with complex numbers

[Dr. Phillip M. Feldman]

When I try to compute the phase of a complex number, I get an error message:

In [3]: from cmath import *
In [4]: x=1+1J
In [5]: phase(x)
<snip>
NameError: name 'phase' is not defined
<snip>
AttributeError: 'complex' object has no attribute 'phase'

Any advice will be appreciated.

 

[alex23]

When I try to compute the phase of a complex number, I get an error message:
[...]
Any advice will be appreciated.

1. What version of Python are you using, and on what platform?

2. What you snipped is necessary to help debug your problem.

3. Do you have a cmath.py in the folder you're running the interpreter
in?