在Python中具有加号，等于号和大于号的表达式

Question

I understand that an expression like i += 1 usually means i = i+1 ...

What would the operation below mean?

b += c > 0

Answer 1

In general, x op = expression , is the syntax for shorthand operators . It will be evaluated like x = x op expression.

As said above in comments, "b += True will increment b by 1 and b += False will not change the value of b", It will see if c is bigger than 0, or not. if it is it will increment b by 1