AttributeError: 'X' object has no attribute 'y'
You accessed an attribute or method that doesn’t exist on that object type.
Exact message you may see
has no attribute'NoneType' object has no attribute
Seen on:
Python
Meaning
The object is a different type than you think (often None, a str instead of a dict, or a library object whose API changed).
Common causes
- Object is None (
'NoneType' object has no attribute) - Wrong type (string vs dict)
- Library version changed the API
- Typo in attribute name
- Module shadowed by a local file
⚡ Quick fix
print(type(obj))before the line- Check the library version and docs
- Guard for None
Detailed fix by platform
Python
- Use
dir(obj)in a debugger to see available attributes.
Code examples
Inspect the real type
python
resp = requests.get(url).json()
print(type(resp)) # <class 'list'> — not a dict, so resp.get / resp.items fail
print(dir(resp)[:20])Module shadowing
bash
# AttributeError: module 'random' has no attribute 'randint'
ls *.py # random.py in your project shadows the standard library
mv random.py my_random.py && rm -rf __pycache__How to diagnose
- Type — print(type(obj)) right before the failing line
- None — Is it NoneType? Then trace why
- Version — Did the library rename/remove the attribute?
- Shadowing — Local file with the same name as a module?
🔧 Still not fixed?
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Where this error sits
Origin: Application & API. Errors that are often confused with or caused by this one (click to open):
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Last updated 14 Oct 2026