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This question should be relatively quick and easy. I just am trying to find out which version of Python's math and cmath packages I have.

Unfortunately, I did not install them using pip. I have already reviewed this stack article which was helpful (because I did not know pip freeze before). However, both packages are not on the list.

I've tried google and looking around a bit, but to no avail. I have tried the following in the interpreter:

import math
print math.__version # error
print math.version # error

I have also tried to use python's help command and breeze through the documentation, but once again, couldn't find anything about how to detect which version I have installed.

I'm not exactly sure what else to try. Any thoughts? Thanks again for your time!

Community
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jlarks32
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2 Answers2

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You can't. Neither math or cmath carry any specific version. They're related to the Python version you're using.

If it's because you want to check whether a function is present or not, let's say isfinite which was added in 3.2. Then you could do that using hasattr:

print(hasattr(math, "isfinite"))

or using sys.version_info:

has_infinite = sys.version_info >= (3, 2)
print(has_infinite)

Both prints True since I'm using Python 3.6.

vallentin
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Absolutely agree with @Vallentin

If you want to know available attribute or methods you could use dir() function. dir() is a powerful inbuilt function in Python 3, which returns list of the attributes and methods of any object (say functions , modules, strings, lists, dictionaries etc.)

import math
print(dir(math))

It will returns a list of available attributes and methods from math packages.

YGautomo
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