Answer to Question #199655 in Python for FORTUNE AIDOO

Question

Describe how catching exceptions can help with file errors. Write three Python examples that actually generate file errors on your computer and catch the errors with try: except: blocks. Include the code and output for each example in your post. 

Describe how you might deal with each error if you were writing a large production program. These descriptions should be general ideas in English, not actual Python code. 

Answer 1

Example-1

def get_sum_even(lst):
    Sum=0;
    for c in  range(0,len(lst)):
        is_int = True
        try:
           # convert to integer
           int(str(lst[c]))
        except ValueError:
           is_int = False
        if(is_int):
           if( lst[c]%2==0):
               Sum = Sum + lst[c]     
    return(Sum)


s = [2, 3, 5, 4, -1, 2]
print(s)
print("Sum = %d"%get_sum_even(s))


s = [1, 2, 3, 4, 'two',2]
print("\n",s)
print("Sum = %d"%get_sum_even(s))


s = []
print("\n",s)
print("Sum = %d"%get_sum_even(s))


s = ['NA']
print("\n",s)
print("Sum = %d"%get_sum_even(s))

Example-2

def divide(f1, f2):
   try:
       answer = f1/f2
       return answer
   except ZeroDivisionError:
       return 'Divide by zero is not allowed'


print(divide(10,5))
print(divide(10,0))

Example-3

while True:
    try:
        x = int(input("Please enter a number: "))
        break
    except ValueError:
        print("Oops!  That was no valid number.  Try again...")