Use this as an example:
begin # "try" block
puts 'I am before the raise.'
raise 'An error has occured.' # optionally: `raise Exception, "message"`
puts 'I am after the raise.' # won't be executed
rescue # optionally: `rescue Exception => ex`
puts 'I am rescued.'
ensure # will always get executed
puts 'Always gets executed.'
end
The equivalent code in Python would be:
try: # try block
print 'I am before the raise.'
raise Exception('An error has occured.') # throw an exception
print 'I am after the raise.' # won't be executed
except: # optionally: `except Exception as ex:`
print 'I am rescued.'
finally: # will always get executed
print 'Always gets executed.'