Python static variable decorator for functions

static_variable_decorator.py

# Source: https://stackoverflow.com/questions/279561/what-is-the-python-equivalent-of-static-variables-inside-a-function/279586#279586

def static_vars(**kwargs):
    def decorate(func):
        for k in kwargs:
            setattr(func, k, kwargs[k])
        return func
    return decorate


@static_vars(counter=0)
def foo():
    foo.counter += 1
    print(f"Counter is {foo.counter}")

Thanks, it works. however, if foo.counter =+ 1, it doesn't work.