Python Typeerror: Unsupported Operand Type(s) For /: 'str' And 'float'

My code: total=tef+tpf-price I've got this error: total=tef+tpf-price unsupported operand type(s) for -: 'float' and 'str' How do I fix it?

Solution 1:

Instead of this

total=tef+tpf-price

Try this, I hope this will help you

total=float(tef)+float(float)tpf-float(price)

Solution 2:

I think you might take user's price input, like:

price = raw_input('--> ')    // Python 2.x

or

price = input('--> ')        // Python 3.x

So you might want to do some validation before using it.

You could cast price from string to float by float(price).

Solution 3:

One simple way to fix it is:

tef=float(price)*5/100.0