raise value error exception in python code example

Example 1: throwing an exception python

raise Exception("message")

Example 2: raise exception in python

raise Exception('I know Python!') # Don't! If you catch, likely to hide bugs.

Example 3: raise valueerror

raise ValueError('A very specific bad thing happened.')

Example 4: python check for exception

try: # put here the code that you expect to error 
  # code
except ValueError: # if you want to catch a ValueError
  # NOTE: you CANNOT catch a syntax error 
  # (UNLESS you are trying to execute code from a string with eval())
  
  # code if python caught the exception
except NameError: # you can catch multiple types of errors!
  # TIP: you can leave the error type blank to make python catch all types of errors!
  
  # code if another exception is caught (this is pretty much a modified if statement)
else: # if no error has been caught do the following:
  
  # code if no exception has been caught