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