python子进程，无此文件或目录

Question

I have read all related Questions, and haven't found solution. Here's my problem:

It can be seen that cmd gets printed and is correct and when I copy paste it to the terminal, it does the correct job. However, calling it via python with absolute path cannot find the file...

Answer 1

Since you are passing the command as a single string, you need to specify shell=True so that the command line is broken up into the appropriate command name and arguments. However, a better approach is to build the list yourself.

cmd = ["glpsol", "-m", os.path.join(os.path.dirname(__file__), "workingLP.txt")]

This avoids the need to escape the spaces in the pathname.