Exception Handling in Python

Program 1

#Exception Handling 
# try:
#     a=int(input("Enter First Number"))
#     b=int(input("Enter Second Number"))
#     c=a//b
#     print(c)
# except ZeroDivisionError as obj:
#     print("Unable to divide by zero")    
# except ValueError as obj:    
#     print("Please enter number only")    

# try:
#     c=a+b
#     print(c)
#     c=a-b
#     print(c)
#     c=a*b
#     print(c)
#     print("End of Program")
# except NameError as obj:    
#     print("Please enter number only")    

# try:
#     a=int(input("Enter First Number"))
#     b=int(input("Enter Second Number"))
#     c=a//b
#     print(c)
# finally:
#     print("This is my finally block")    
# try:
#     n=int(input("Enter First Number")) 
#     if(n%2==0):
#         print("No is Even")
#     else:
#         print("No is odd")        
# except ValueError as obj:
#     print("Enter number only")    
#     print(obj)

mylist=[10,20,"hello",30,40,50,"Bye"]
print(mylist)
try:
    i=int(input("Enter index value: "))
    print(mylist[i])
except IndexError as obj:
    print("Invalid index number")    
except ValueError as obj:
    print("Enter number only")

Program 2

#Exception Handling 
# try:
#     a=int(input("Enter First Number"))
#     b=int(input("Enter Second Number"))
#     c=a//b
#     print(c)
# except Exception as obj:
#     print("An Error in code")    

# try:
#     print("This is my try block")
#     c=10//0
# except:
#     print("This is my except block")
# else:
#     print("This is my else block")    

# try:
#     a=int(input("Enter First Number"))
#     b=int(input("Enter Second Number"))
#     c=a//b
#     print(c)
# except Exception as obj:
#     print("Error in code")    
# else:
#     c=a+b
#     print(c)      
#     c=a-b
#     print(c)      
#     c=a*b
#     print(c)
# finally:
#     print("This is my finally block")    

# Raise 
# try:
#     a=int(input("Enter First Number"))
#     b=int(input("Enter Second Number"))
#     if(b==5):
#         raise ZeroDivisionError("Dont divide number by 5")
#     c=a//b
#     print(c)
# except Exception as obj:
#     print("Error in Code")    

try:
    hindi=int(input("Enter marks of hindi: "))
    if(hindi<0 or hindi>100):
        raise Exception("Invalid Marks")

    eng=int(input("Enter marks of english: "))
    if(eng<0 or eng>100):
        raise Exception("Invalid Marks")
    
    math=int(input("Enter marks of maths: "))
    if(eng<0 or eng>100):
        raise Exception("Invalid Marks")
    
    comp=int(input("Enter marks of computer: "))
    if(eng<0 or eng>100):
        raise Exception("Invalid Marks")
    
except Exception as obj:
    print("Error in Application pls check")        

else:
    total=hindi+eng+math+comp
    per=total//4
    print("Total marks: ",total)
    print("Percentages: ",per)