Chaquopy: error while reading a text file from python code "No s

ghz 2days ago ⋅ 5 views

Chaquopy: error while reading a text file from python code "No such file or directory"

I am using python as a backend code for some scientific programs in the android app. For that, I am using the Chaquopy plugin. I found an error "No such file or directory" when accessing the text file which is stored at "app/src/main/python/". I think this is a path issue.

Answer

The issue you're encountering is likely due to the way file paths are handled in Android when using Chaquopy. The file you are trying to access is stored inside the app/src/main/python/ directory, which is part of the project structure, but isn't directly accessible from the app's runtime environment.

When accessing files in Android, you need to consider the Android file system and the way Chaquopy interacts with it. Here’s how you can solve the issue:

1. Use getAssets() or getFilesDir()

Chaquopy allows you to interact with files through the app's assets or internal storage. If you need to access a file stored in the python/ directory or in assets, you should copy it to the app's storage or access it through the assets directory.

For accessing files in the assets directory, you can do something like this in your Python code (via Chaquopy):

import os
import android

droid = android.Android()

# Access the file stored in the 'assets' directory
file_path = "assets/your_text_file.txt"
with open(file_path, 'r') as file:
    content = file.read()
    print(content)

2. File Access via Chaquopy

Chaquopy gives you access to Python files within the app, but you need to use Chaquopy's methods to access them. You can either read them directly or copy them into the app's files directory using Android APIs.

Example of accessing files in filesDir:

import os

file_name = "your_text_file.txt"
file_path = os.path.join(os.environ.get('PYTHONFILES'), file_name)

with open(file_path, 'r') as file:
    content = file.read()
    print(content)

This code uses os.environ.get('PYTHONFILES') to get the correct path for Python files inside your Android app's structure.

3. Check if the File Exists

Ensure that the file you are trying to access actually exists in the right directory in your Android project. You can check by printing out the current working directory in your code:

import os
print(os.getcwd())  # Check the current directory

Conclusion

The error you're encountering is related to the way paths are structured and accessed in Android. Try the above solutions based on where you have stored your file and how you intend to access it from the Python backend in your Android app.

#py