handler function

handler idea

#!/usr/bin/python2.7

# Simple example of using a 'handler' function
# -- Chris2048

def parseLine(line):
    if line==True:
        raise Exception()
    return "foo"

def parseLines(lines, handler):
    for line in lines:
        try:
            yield parseLine(line)
        except Exception, e:
            try: 
                yield handler(e, line)
            except SkipException:
                continue

one = [False, True, False]


def replacehandler(e, line):
    print "Exception '%s' was thrown!" % e.__repr__()
    if line==True:
        return "bar"

print "\nwith replace:"
oner = parseLines(one, replacehandler)
print [i for i in oner]


class SkipException(Exception):
    pass

def skiphandler(e, line):
    print "Exception '%s' was thrown!" % e.__repr__()
    raise SkipException()

print "\nwith skip:"
oner = parseLines(one, skiphandler)
print [i for i in oner]


def stophandler(e, line):
    print "Exception '%s' was thrown!" % e.__repr__()
    raise StopIteration()

print "\nwith stop"
oner = parseLines(one, stophandler)
print [i for i in oner]


class SomeException(Exception):
    pass

def excepthandler(e, line):
    print "Exception '%s' was thrown!" % e.__repr__()
    raise SomeException()

print "\nwith except:"
try:
    oner = parseLines(one, excepthandler)
    print [i for i in oner]
except Exception as e:
    print "Got exception '%s'!" % e.__repr__()


def askhandler(e, line):
    action = raw_input("Got exception '%s',\nWhat do I do? (Skip, Return, sTop, rAise):\n" % e.__repr__())
    while action not in ('s','S','r','R','t','T','a','A'):
        print "Please enter valid value!"
        action = raw_input("Got exception '%s',\nWhat do I do? (Skip, Return, sTop, rAise):\n" % e.__repr__())
    if action in ('s','S'):
        return skiphandler(e, line)
    if action in ('t','T'):
        return stophandler(e, line)
    if action in ('a','A'):
        return excepthandler(e, line)
    if action in ('r','R'):
        return raw_input("Replace with what?:\n")

print "\nwith ask:"
oner = parseLines(one, askhandler)
print [i for i in oner]