50 lines
No EOL
2.1 KiB
Markdown
50 lines
No EOL
2.1 KiB
Markdown
# Fix for UnboundLocalError in application.py
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## Problem
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The application was encountering the following error when starting up:
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```
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Traceback (most recent call last):
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File "C:\Users\cody\PycharmProjects\Podcastrr\main.py", line 47, in <module>
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main()
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File "C:\Users\cody\PycharmProjects\Podcastrr\main.py", line 26, in main
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app = create_app()
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^^^^^^^^^^^^
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File "C:\Users\cody\PycharmProjects\Podcastrr\application.py", line 25, in create_app
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SECRET_KEY=os.environ.get('SECRET_KEY', 'dev'),
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^^
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UnboundLocalError: cannot access local variable 'os' where it is not associated with a value
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```
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## Root Cause
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The error was caused by a scope issue with the `os` module in `application.py`. The module was imported at the top of the file (global scope), but it was also imported again inside the `app_context()` block (local scope).
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When Python sees a variable being assigned in a function (which includes imports), it treats that variable as local to the function. This means that when the code tried to access `os.environ.get()` before the local import was executed, Python raised an `UnboundLocalError` because it saw that `os` would be defined as a local variable later in the function, but it wasn't yet defined at the point of use.
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## Solution
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The solution was to remove the redundant import of `os` inside the `app_context()` block. The `os` module was already imported at the top of the file, so there was no need to import it again.
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### Changes Made
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In `application.py`, removed the following line:
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```python
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import os
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```
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from inside the `app_context()` block (around line 72).
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## Verification
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After making this change, the application should start up without encountering the `UnboundLocalError`. The `os` module from the global scope will be used throughout the function, which resolves the error.
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## Preventing Similar Issues in the Future
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To prevent similar issues in the future:
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1. Avoid importing the same module multiple times in different scopes
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2. Be careful with variable names that might shadow global imports
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3. When possible, import all modules at the top of the file |