I'm writing Python code. I want to check if numpy and wxpython are installed on machine. How to do that??

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7 Answers

You can try importing them and then handle the ImportError if the module doesn't exist.

try: import numpy except ImportError: print "numpy is not installed"

I think you also may use this

>> import numpy >> print numpy.__version__

Update: for python3 use print(numpy.__version__)

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The traditional method for checking for packages in Python is "it's better to beg forgiveness than ask permission", or rather, "it's better to catch an exception than test a condition."

try: import numpy HAS_NUMPY = True except ImportError: HAS_NUMPY = False
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In the numpy README.txt file, it says

After installation, tests can be run with:

python -c 'import numpy; numpy.test()'

This should be a sufficient test for proper installation.

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If you use eclipse, you simply type "import numpy" and eclipse will "complain" if doesn't find.

I tried some methods, which did not work for me. The simplest way I found was to try to build a numpy array and then print it (see code below). If the array prints, numpy is installed, if array doesn't print, numpy is not installed.

import numpy as np a=np.array([[1. ,2. ,3.], [4. ,5. ,6.]]) print(a)

Option 1:

Use following command in python ide.:

import numpy

Option 2:

Go to Python -> site-packages folder. There you should be able to find numpy and the numpy distribution info folder.

If any of the above is true then you installed numpy successfully.