Python Tutorial Series - Exceptions

Exceptions are used to catch errors during program execution. Catching errors with exceptions during program execution helps prevent a program from crashing.

Exception handling is performed in Python as follows:

try:
  do_something()
except:
  print ('Exception occurred')


Catch a specific exception:

try:
  do_something()
except ValueError:
  print ('ValueError Exception occurred')


Catch multiple exceptions:

try:
  do_something()
except (ValueError, OSError):
  print ('Multiple Exceptions occurred')

try:
  do_something()
except ValueError:
  print ('ValueError Exception occurred')
except OSError:
  print ('OSError Exception occurred')


Use an else statement to perform specific actions when an exception is not thrown:

try:
  open_some_file()
except ValueError:
  print ('ValueError Exception occurred')
else:
  close_the_file()


Throw an exception:

raise NameError('Name error exception')



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