Question

I have a bash shell script which calls some python scripts. I am running windows with cygwin which has python in /usr/bin/python. I also have python and numpy installed as a windows package. When I execute the script from cygwin , I get an ImportError – no module named numpy. I have tried running from windows shell but the bash script does not run. Any ideas? My script is below

for target in $(ls large_t) ;  
do 
./emulate.py $target ;  #
done | sort | gawk '{print $2,$3,$4,$5,$6 > $1}{print $1}' | sort | uniq > frames

#frames contains a list of filenames, each files name is the timestamp 
rm -f video
touch video

# for each frame
for f in $(cat frames)
do
./make_target_ant.py $f 
cat $f.bscan >> video 
done

Thanks

Answer 1

Windows python and Cygwin Python are independent; if you’re using Cygwin’s Python, you need to have numpy installed in cygwin.

If you’d prefer to use the Windows python, you should be able to call it from a bash script by either:

• Calling the windows executable directly:
  c:/Python/python.exe ./emulate.py
• Changing the hash-bang to point at the Windows install:
  #!c:/Python/python.exe in the script, rather than #!/usr/bin/env python or #!/usr/bin/python.
• Putting Windows’ python in your path before Cygwin python, for the duration of the script:
  PATH=c:/Python/:$PATH ./emulate.py
  
  where emulate.py uses the /bin/env method of running python.