toil.lib.exceptions

Classes

panic

The Python idiom for reraising a primary exception fails when the except block raises a

Functions

raise_(exc_type, exc_value, traceback)

Module Contents

class toil.lib.exceptions.panic(log=None)

The Python idiom for reraising a primary exception fails when the except block raises a secondary exception, e.g. while trying to cleanup. In that case the original exception is lost and the secondary exception is reraised. The solution seems to be to save the primary exception info as returned from sys.exc_info() and then reraise that.

This is a contextmanager that should be used like this

try:

# do something that can fail

except:

with panic( log ):

# do cleanup that can also fail

If a logging logger is passed to panic(), any secondary Exception raised within the with block will be logged. Otherwise those exceptions are swallowed. At the end of the with block the primary exception will be reraised.

log

exc_info = None

__enter__()

__exit__(*exc_info)

toil.lib.exceptions.raise_(exc_type, exc_value, traceback)

Return type:

None