Practice Question

Question

Give an example of decorator?

Python

def decor(func):
  def inner(name):
    if name=="Amit":
      print("Hello Amit Bad Morning")
    else:
      func(name)
  return inner

def wish(name):
  print("Hello",name,"Good Morning")

decorfunction=decor(wish)
wish("Ajay")
wish("Amit")
decorfunction("Manish")
decorfunction("Amit")

Output

PowerShell

Hello Ajay Good Morning
Hello Amit Good Morning
Hello Manish Good Morning
Hello Amit Bad Morning

Question

How to call same function with decorator and without decorator?

Python

def smart_division(func):
  def inner(a,b):
    print("We are dividing",a,"with",b)
    if b==0:
      print("OOPS...cannot divide")
      return
    else:
      return func(a,b)
  return inner

#@smart_division
def division(a,b):
    return a/b

print(division(20,2))
print(division(20,0))

Without decorator i.e. decorator not applied.

PowerShell

10.0 
ZeroDivisionError: division by zero

With decorator i.e. line-11 uncommented.

Output

PowerShell

We are dividing 20 with 2
10.0
We are dividing 20 with 0
OOPS...cannot divide
None

Ungraded Questions

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