AttributeError — Expert Playground
Raised when an attribute reference or assignment fails
Python Playground
# Exception groups (Python 3.11+)
import sys
print(f"Python {sys.version}")
# Exception hierarchy inspection
print(f"AttributeError MRO:")
for cls in AttributeError.__mro__:
print(f" {cls.__name__}")
# Exception attributes
try:
"hello".nonexistent
except AttributeError as e:
print(f"\nException attributes:")
print(f" args: {e.args}")
print(f" __traceback__: {type(e.__traceback__)}")
# Traceback manipulation
import traceback
tb_lines = traceback.format_exception(type(e), e, e.__traceback__)
print(f" Traceback lines: {len(tb_lines)}")
Output
Click "Run" to execute your code
Understanding the exception hierarchy and traceback system helps build robust error handling and debugging tools.
Challenge
Try modifying the code above to explore different behaviors. Can you extend the example to handle a new use case?