# Program 54: Copy File
def main():
    f1 = open("test.txt", "r")
    f2 = open("copy.txt", "w")

    data = f1.read()

    f2.write(data)

    f1.close()
    f2.close()

main()

---------------------------------------------------------------------------

FileNotFoundError                         Traceback (most recent call last)

Cell In[6], line 13
      9 
     10     f1.close()
     11     f2.close()
     12 
---> 13 main()


Cell In[6], line 3, in main()
      2 def main():
----> 3     f1 = open("test.txt", "r")
      4     f2 = open("copy.txt", "w")
      5 
      6     data = f1.read()


FileNotFoundError: [Errno 2] No such file or directory: 'test.txt'

# Program 55: Exception
def main():
    try:
        a = int(input("Enter number: "))
        b = int(input("Enter number: "))

        print(a / b)

    except:
        print("Error occurred")

main()

Enter number:  67
Enter number:  89


0.7528089887640449

# Program 56: Custom Exception
def main():
    try:
        age = int(input("Enter age: "))

        if age < 18:
            raise Exception("Too young")

        print("Allowed")

    except Exception as e:
        print(e)

main()

Enter age:  89


Allowed