Python：使用命令行中的相对路径运行脚本

Question

TL;DR

What are the options on Windows 10 to run from command line a python script specified by a relative path? Can environment variables be changed to do so? How can this be done?

LONG

I am using Windows 10. When I follow this installation guide (written for Linux), everything is fine until I need to perform the following on Windows

# From tensorflow/models/research/
export PYTHONPATH=$PYTHONPATH:`pwd`:`pwd`/slim

On Windows, I added the two paths (the entire, absolute, path) to PYTHONPATH. When I execute the following; I see the extra two paths added.

C:\User\me>    python -c "import sys; print(sys.path)"

However, if I create a simple test.py script

print("Relative path works")

and run it from the command line:

C:\User\me> python test.py

it works if the test.py file is saved in C:\\User\\me\\, but NOT when it is saved in the folders of PYTHONPATH.

This SO Q&A says that

PYTHONPATH is used by the python interpreter. It is not the same as Windows' PATH environment variable. You can't use it as a search path for passing files to the interpreter on the command line.

But I could not find how I can achieve what I need, using relative path of script to run it from command line. Please note that using the absolute path is not an option, because the instalation guide requires 2 folders are added to the PYTHONPATH, in order for the task to work.

It should be possible but I did not find any answer - Python 3 documentation describes Command line option for running script with relative path:

Execute the Python code contained in script, which must be a filesystem path (absolute or relative) referring to either a Python file...

Answer 1

These lines from the install guide are intended to be run after a cd .../tensorflow/models/research/ and thus are absolute paths:

 # From tensorflow/models/research/ export PYTHONPATH=$PYTHONPATH:`pwd`:`pwd`/slim 

You will likely need to do something similar on Windows. The equivalent would likely be to add the absolute paths to the libraries to PYTHONPATH environment variable.

Answer 2

I haven't tested this but as mentioned in here , this >>> export PYTHONPATH=$PYTHONPATH: pwd : pwd /slim should be used as

set PYTHONPATH=%PYTHONPATH%;%cd%;%cd%\\slim