python_koans/python2/koans/about_lambdas.py at master · kolapsys/python_koans · GitHub

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#!/usr/bin/env python

# -*- coding: utf-8 -*-

# Based slightly on the lambdas section of AboutBlocks in the Ruby Koans

from runner.koan import *

class AboutLambdas(Koan):

def test_lambdas_can_be_assigned_to_variables_and_called_explicitly(self):

add_one = lambda n: n + 1

self.assertEqual(__, add_one(10))

# ------------------------------------------------------------------

def make_order(self, order):

return lambda qty: str(qty) + " " + order + "s"

def test_accessing_lambda_via_assignment(self):

sausages = self.make_order('sausage')

eggs = self.make_order('egg')

self.assertEqual(__, sausages(3))

self.assertEqual(__, eggs(2))

def test_accessing_lambda_without_assignment(self):

self.assertEqual(__, self.make_order('spam')(39823))

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