Advanced exceptions - the traceback attribute
Each exception object owns a __traceback__ attribute.
Python allows us to operate on the traceback details because each exception object (not only chained ones) owns a __traceback__ attribute.
Let's examine such an object while we’re preparing our rocket to launch.
Final check procedure
The captain's name is John
The pilot's name is Mary
The mechanic's name is Mike
<traceback object at 0x00753300>
<class 'traceback'>
output
Code
class RocketNotReadyError(Exception):pass
def personnel_check():
try:
print("\tThe captain's name is", crew[0])
print("\tThe pilot's name is", crew[1])
print("\tThe mechanic's name is", crew[2])
print("\tThe navigator's name is", crew[3])
except IndexError as e:
raise RocketNotReadyError('Crew is incomplete') from e
crew = ['John', 'Mary', 'Mike']
print('Final check procedure')
try:
personnel_check()
except RocketNotReadyError as f:
print(f.__traceback__)
print(type(f.__traceback__))
{{ dockerServerErrorMsg }}
×
{{ errorMsg }}
×
{{ successMsg }}
×