Implementing LINQ in Python

import itertools

class IterHelper(object):
    def __init__(self, iterable = None):
        self.iterable = iterable

def map(self, func):
        return IterHelper(itertools.imap(func, self.iterable))

def filter(self, predicate):
        return IterHelper(itertools.ifilter(predicate, self.iterable))

def chain(self):
    	return IterHelper(itertools.chain.from_iterable(self.iterable))

def first(self):
        for item in self.iterable:
            return item
        return None

def to_list(self):
        return list(self.iterable)

technologies = ["python", "ruby", "javascript", "coffeescript", "ruby on rails", "django", "node.js", "sinatra", "flask", "cherrypy"]

# method 1 - traditional if statement nested within a loop
def get_tech(name):
	for tech in technologies:
		if tech == name:
			return tech
	return None

print get_tech("python")

# method 2 - list comprehension
def get_tech(name):
	results = [tech for tech in technologies if tech == name]
	if len(results) > 0:
		return results[0]
	return None

print get_tech("ruby")

#method 3 - using linq pattern
def get_tech(name):
	return IterHelper(technologies)\
		.filter(lambda tech:tech == name)\
		.first()

print get_tech("ruby")

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