Assert__.py

'''
Python has built-in assert statement to use assertion condition in the program.
assert statement has a condition or expression which is supposed to be always true.
If the condition is false assert halts the program and gives an AssertionError.
 '''
#----------------------------------------------------------------------------------------Copid code from Programiz ----------------------------------------------------
#-----------------------------------------------------------------------------------Example #1: Using assert without Error Message----------------------------------------
def avg(marks):
    assert len(marks) != 0
    return sum(marks)/len(marks)

mark1 = []
print("Average of mark1:",avg(mark1))
#-----------------------------------------------------------------------------------Example #2: Using assert with error message-------------------------------------------

def avg(marks):
    assert len(marks) != 0,"List is empty."
    return sum(marks)/len(marks)

mark2 = [55,88,78,90,79]
print("Average of mark2:",avg(mark2))

mark1 = []
print("Average of mark1:",avg(mark1))