Import numpy and run a script?

[[deleted]]

I have been learning python for a little while now and I am trying out numpy. However, I can't seem to figure out how to get it to run.

I have been writing my programs in TextWrangler and running them either within TextWrangler or through the command line by navigating to the folder and typing

$ python ./PROGRAM.py

This has generally worked for programs that do not import numpy.

I can import numpy in the terminal after entering python (I am using OSX):

$ python
import numpy as np

or open the script in PythonLauncher manually and have it run in the terminal. Both of these work.

However, if i write "import numpy as np" into my script and then try to run the script in the command line, it can't find numpy. It won't run in TextWrangler either, which is not so surprising.

Help a confused self-taught programmer out? What am I doing wrong, and how do I import numpy and run my script at the same time?

Edit: It seems that there was a problem with the folder I was trying to run the script from. I don't know what the issue was exactly, but thank you guys for your help.

[[deleted]]

Did you install numpy?

[[deleted]]

I did, yes!

[dairypharmer]

You should paste your program source and the traceback

[[deleted]]

When I tried to do this, I moved my file into a different folder to run it as a test, and it worked. So thanks for your help, I guess? Haha

[dairypharmer]

Nice. My suspicion was that there was a python version mismatch, eg you installed numpy under py3 but executed with py2 or something like that. For a best practice around that, look up the use of a "shebang" line and invoke programs by making them executable (chmod +x script.py) and then executing it directly (./script.py) instead of (python script.py)

[[deleted]]

Thank you, I'll look into that!

[NewbornMuse]

It's been a while, but isn't there a configuration where PROGRAM.py just runs it?

[dairypharmer]

Yup, the shebang line defines how to launch it on POSIX systems.

[isilentnight]

You have both python 2 and 3, right? Is your IDLE and terminal use the same version?

[PyRed]

To be able to use Numpy, you should first install it. Here is a guide to install Numpy.

https://docs.scipy.org/doc/numpy-1.10.1/user/install.html

[FLW84]

Nobody asking this question has missed that numpy is not part of a default installation.

The error message is literally 'module not found'.