From: LinkedIn course ‘Python Essential Training’ by Ryan Mitchell https://www.linkedin.com/learning/python-essential-training-14898805
Try, except, finally
import time as time
def causeError():
start = time.time() #set start timer
try:
#delay run by 0.5 secs
time.sleep(0.5)
return 1/0
except Exception:
print('There was some sort of error!')
finally:
print(f'Function took {time.time() - start} seconds to execute')
causeError()## There was some sort of error!
## Function took 0.5048558712005615 seconds to executeCustom Decorators
*args **kwargs are multiple arguments or string arguments.
def handleException(func):
def wrapper(*args):
try:
func(*args)
except TypeError:
print('There was a type error!')
except ZeroDivisionError:
print('There was a zero division error!')
except Exception:
print('There was some sort of error!')
return wrapper
@handleException
def causeError():
return 1/0
causeError()## There was a zero division error!Raising exceptions
@handleException
def raiseError(n):
if n == 0:
raise Exception()
print(n)
raiseError(0)## There was some sort of error!raiseError(1)## 1Adding attributes to custom exceptions
class HttpException(Exception):
statusCode = None
message = None
# inherit parent class but with alteration.
def __init__(self, message=''):
#super().__init__(colored(message,'red')) #missing package for 'colored' function
super().__init__(f'Status code: {self.statusCode} and message is: {self.message}')
class NotFound(HttpException):
statusCode = 404
message = 'Resource not found'
class ServerError(HttpException):
statusCode = 500
message = 'The server messed up'
def raiseServerError():
raise ServerError()
#raiseServerError()