ModuleNotFoundError — Expert Playground
Subclass of ImportError; raised when a module cannot be located
Python Playground
# Exception groups (Python 3.11+)
import sys
print(f"Python {sys.version}")
# Exception hierarchy inspection
print(f"ModuleNotFoundError MRO:")
for cls in ModuleNotFoundError.__mro__:
print(f" {cls.__name__}")
# Exception attributes
try:
import nonexistent_module_xyz
except ModuleNotFoundError 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?