Answer to Question #284986 in Python for ugjkyg

Question

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

Answer 1

Python, exceptions are handled using a try statement. Any operation that raise an exception is put inside the try clause. except clause is used to handle the exceptions. Below is the code example:

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))