Python being strange?!?!?!

[digitaldoughnut]

I have written this piece of code, its basically a calculator and when i try to run the code in python it give me this error: "unindent does not match any outer indentation level" 

it was working before but now it won't work does anyone have any ideas why???

thanks  

 

def subtract(first,second):
    print(first-second)
def add(first,second):
    print(first+second)
def divide(first,second):
    print(first/second)
def multiply(first,second):
    print(first*second)
def exponential(first,second):
    print(first**second)

#This is the main program
carryon = False
while not carryon:
        option = input("s to subtract /nor a to add/nor d to divide /nor d to divide /nor e to exponential /nor q to quit")

    if option = s:      <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<*****(THIS IS THE LINE THAT PYTHON DOESN"T LIKE!!!)*****
            one = int(input("Enter a number")
            two = int(input("Enter a second number")
            subtract(first,second)

    elif option = a:
            one = int(input("Enter a number")
            two = int(input("Enter a second number")
            add(first,second)

    elif option = d:
            one = int(input("Enter a number")
            two = int(input("Enter a second number")
            divide(first,second)

    elif option = m:
            one = int(input("Enter a number")
            two = int(input("Enter a second number")
            multiply(first,second)

    elif option e:
            one = int(input("Enter a number")
            two = int(input("Enter a second number")
            exponential(first,second)

    elif option = q:
                  carryon = True
    else:
                  print("Enter numbers as you have not entered a valid number")
        

[fizzlesticks]

Your indention is wrong, the line above the if is double indented. The amount you indent doesn't matter but you have to be consistent. Also you need double equals == to compare values and the strings you're comparing to need quotes.

 

And in the future please use code tags.