B4J Question [pybridge] Using Multiple .py files

[stevel05]

I have been playing with pybridge and came up with a scenario that I wanted to import a variable from a second py file using an import. I presume for the usual reasons, File.DirAssets cannot be on the PythonPath and therefore can't import from there.

I thought I would create a directory in the Python directory of the Objects directory and add that to PythonPath. I chose the Python Directory as that gets copied verbatim by the Build Standalone Process.

I tried adding "PYTHONPATH" to the EnvironmentVars, but looking at the code for PyBridge, this gets over written.

You may already have a simpler solution, but if not, could I request amending the PyBridge.Start method to do something similar to this:

Dim PythonPath As String = Options.EnvironmentVars.GetDefault("PYTHONPATH","")
If PythonPath <> "" Then
    Options.EnvironmentVars.Put("PYTHONPATH", Options.PyBridgePath & ";" & PythonPath)
Else
    Options.EnvironmentVars.Put("PYTHONPATH", Options.PyBridgePath)
End If

Which checks if the PythonPath env has been set and prepends the PyBridgePath.

I have tried this out and it seems to work as expected.

 

[stevel05]

I've just realized that this may cause issues when exporting or backing up the project so may not be the best solution.

 

[Erel]

I've added a new Option.PythonPath field and it will be set together with PyBridgePath.

 

[stevel05]

For completeness, I eventually decided to store the .py files in the Files folder and when run, copy them to their own folder in Dir.App and point the PYTHONPATH environment variable to that. This satisfies the need to be able to distribute the python files with the ide's export as zip, and works without change when building a standalone package.

 

[Daestrum]

I had a similar requirement (calling other script functions in DirAssets)

Probably not the best way, but it works without having to move the script files around.

B4J

    Dim scripts As String = File.geturi(File.DirAssets,"__init__.py").Replace("file:/","").Replace("\","/").Replace("__init__.py","").Replace("%20"," ")
    opt.EnvironmentVars = CreateMap("script_dir" : scripts)

see post #7 for Python code to use with this

Justr make sure you have an __init__.py in the files folder

 

[Erel]

It will not work in release mode as the Files folder is inside the compiled jar.

 

[Daestrum]

got it working with this python change

import os, sys, zipfile, tempfile
script_dir = os.getenv("SCRIPT_DIR")
# Create a persistent temporary directory
temp_dir = tempfile.TemporaryDirectory()
extracted_scripts_path = None
if script_dir.startswith("jar:"):
    jar_path = script_dir[len("jar:"):]
    jar_path = jar_path[:jar_path.find("!")]
    with zipfile.ZipFile(jar_path, 'r') as jar_file:
        jar_file.extractall(temp_dir.name)
        extracted_scripts_path = os.path.join(temp_dir.name, "Files")
else:
    extracted_scripts_path = script_dir
sys.path.append(extracted_scripts_path)
# any imports from here to local scripts are valid
from First_Python import func1
print(func1(4, 7))

Edit: forgot this bit when finished

temp_dir.cleanup()