What is the difference between try/except and assert?

assert only check if a condition is true or not and throw an exception. A try/except block can run a few statements and check if any of them throw an exception so you can process it in the exceptpart. Examples:

assert(1 == 2)

will give you an AsertionError.

try:
    # some statements # ... except OSError as err: #If an OSerror exception is thrown, you can process it here. For example: print("OS error: {0}".format(err))

Your code will look like this:

def function_addition(x,y): try: assert (y!=0) except: raise ValueError('y is 0.') total= x/y return total num1=float(input("Write a number :")) num2=float (input("Write a second number:")) try: result=function_addition(num1,num2) except ValueError as ve: print(ve) else: print(result)

If you save it in a fun.py file and run it, you will have this output:

Write a number :1 Write a second number:2 0.5 # Run it again. Write a number :0 Write a second number:0 y is 0.