io.py

from collections import namedtuple

PutStrLn = namedtuple('PutStrLn', 'value')
Read = namedtuple('Read', [])

def hello():
    _ = yield PutStrLn('Hello.')
    return True

def f(myname):
    status = yield from hello()
    _ = yield PutStrLn('What\'s your name?')
    name = yield Read()
    _ = yield PutStrLn('Nice to meet you, ' + name + '. I am ' + myname + '.')
    return status

def runIO(it):
    try:
        request = it.__next__()
        while True:
            if isinstance(request, PutStrLn):
                print(request.value)
                request = it.send(True)
            elif isinstance(request, Read):
                request = it.send(input())
            else:
                raise NotImplementedError('Unknown request.')
    except StopIteration as s:
        return s.value

runIO(f('Jack'))

def runE(effects):
    def run0(it):
        output_lines = []
        try:
            request = it.__next__()
            while True:
                for cls, handler in effects:
                    if isinstance(request, cls):
                        result = handler(request)
                        request = it.send(result)
                        break
                else:
                    raise NotImplementedError('Unknown request.')
        except StopIteration as s:
            return s.value
    return run0

# runIO can be defined in terms of runE
runIO = runE([(PutStrLn, lambda r: print(r.value)), 
              (Read, lambda r: input())])
runIO(f('abc'))