Python

TypeError: 'NoneType' object is not subscriptable

TypeError: 'NoneType' Not Subscriptable

You tried to use [] or indexing on a value that is None.

Common Causes

Function returned None unexpectedly
Missing return statement
Failed lookup (dict.get returned None)
Uninitialized variable

Fixes

1. Check for None before indexing

if result is not None:
    x = result[0]

2. Use .get() with default
```
value = d.get('key', default)
```

3. Add return statement

def foo():
    x = compute()
    return x  # was missing

Still not fixed?

• Search the exact error message on Stack Overflow or GitHub Issues
• Check the official docs for the language or tool
• Ensure your versions (Node, Python, npm, Docker) are up to date
• Try in a minimal reproduction (new project, single file)

Related Errors

KeyError IndentationError

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