How do I stop a program when an exception is raised in Python

Question

I need to stop my program when an exception is raised in Python  How do I implement this

User · Answer

As far as I know  if an exception is not caught by your script  it will be interrupted

User · Answer

import sys  try    print  stuff   except    sys exit 1    exiing with a non zero value is better for returning from an error

User · Answer

As far as I know  if an exception is not caught by your script  it will be interrupted

User · Answer

You can stop catching the exception  or - if you need to catch it  to do some custom handling   you can re-raise   try    doSomeEvilThing   except Exception  e    handleException e    raise   Note that typing raise without passing an exception object causes the original traceback to be preserved  Typically it is much better than raise e   Of course - you can also explicitly call   import sys  sys exit exitCodeYouFindAppropriate    This causes SystemExit exception to be raised  and  unless you catch it somewhere  terminates your application with specified exit code

User · Answer

If you don t handle an exception  it will propagate up the call stack up to the interpreter  which will then display a traceback and exit  IOW   you don t have to do anything to make your script exit when an exception happens

User · Answer

import sys  try         your code here except Exception as err      print  quot Error   quot    str err   sys exit 50    whatever non zero exit code

User · Answer

You can stop catching the exception  or - if you need to catch it  to do some custom handling   you can re-raise   try    doSomeEvilThing   except Exception  e    handleException e    raise   Note that typing raise without passing an exception object causes the original traceback to be preserved  Typically it is much better than raise e   Of course - you can also explicitly call   import sys  sys exit exitCodeYouFindAppropriate    This causes SystemExit exception to be raised  and  unless you catch it somewhere  terminates your application with specified exit code

User · Answer

As far as I know  if an exception is not caught by your script  it will be interrupted

User · Answer

import sys  try         your code here except Exception as err      print  quot Error   quot    str err   sys exit 50    whatever non zero exit code

User · Answer

If you don t handle an exception  it will propagate up the call stack up to the interpreter  which will then display a traceback and exit  IOW   you don t have to do anything to make your script exit when an exception happens

User · Answer

import sys  try    print  stuff   except    sys exit 1    exiing with a non zero value is better for returning from an error

User · Answer

You can stop catching the exception  or - if you need to catch it  to do some custom handling   you can re-raise   try    doSomeEvilThing   except Exception  e    handleException e    raise   Note that typing raise without passing an exception object causes the original traceback to be preserved  Typically it is much better than raise e   Of course - you can also explicitly call   import sys  sys exit exitCodeYouFindAppropriate    This causes SystemExit exception to be raised  and  unless you catch it somewhere  terminates your application with specified exit code

User · Answer

import sys  try    print  stuff   except    sys exit 1    exiing with a non zero value is better for returning from an error

User · Answer

import sys  try      import feedparser except      print  Error  Cannot import feedparser  n       sys exit 1    Here we re exiting with a status code of 1  It is usually also helpful to output an error message  write to a log  and clean up

User · Answer

If you don t handle an exception  it will propagate up the call stack up to the interpreter  which will then display a traceback and exit  IOW   you don t have to do anything to make your script exit when an exception happens

User · Answer

As far as I know  if an exception is not caught by your script  it will be interrupted

User · Answer

import sys  try      import feedparser except      print  Error  Cannot import feedparser  n       sys exit 1    Here we re exiting with a status code of 1  It is usually also helpful to output an error message  write to a log  and clean up

User · Answer

You can stop catching the exception  or - if you need to catch it  to do some custom handling   you can re-raise   try    doSomeEvilThing   except Exception  e    handleException e    raise   Note that typing raise without passing an exception object causes the original traceback to be preserved  Typically it is much better than raise e   Of course - you can also explicitly call   import sys  sys exit exitCodeYouFindAppropriate    This causes SystemExit exception to be raised  and  unless you catch it somewhere  terminates your application with specified exit code

User · Answer

import sys  try    print  stuff   except    sys exit 1    exiing with a non zero value is better for returning from an error

User · Answer

If you don t handle an exception  it will propagate up the call stack up to the interpreter  which will then display a traceback and exit  IOW   you don t have to do anything to make your script exit when an exception happens

[python] How do I stop a program when an exception is raised in Python?

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