\u63a5\u7740\u4e0a\u4e00\u4e2ahttp:\/\/jpuyy.com\/2012\/12\/python-simple-programs-a.html<\/p>\n
\u4f8b11.\u4e09\u5f15\u53f7\uff0cwhile\u5faa\u73af–Triple-quoted strings, while loop<\/p>\n
REFRAIN = '''\r\n%d bottles of beer on the wall,\r\n%d bottles of beer,\r\ntake one down, pass it around,\r\n%d bottles of beer on the wall!\r\n'''\r\nbottles_of_beer = 99\r\nwhile bottles_of_beer > 1:\r\n print REFRAIN % (bottles_of_beer, bottles_of_beer,\r\n bottles_of_beer - 1)\r\n bottles_of_beer -= 1<\/pre>\n\u4f8b12.python\u4e2d\u7684\u7c7b–Classes<\/p>\n
class BankAccount(object):\r\n def __init__(self, initial_balance=0):\r\n self.balance = initial_balance\r\n def deposit(self, amount):\r\n self.balance += amount\r\n def withdraw(self, amount):\r\n self.balance -= amount\r\n def overdrawn(self):\r\n return self.balance < 0\r\nmy_account = BankAccount(15)\r\nmy_account.withdraw(5)\r\nprint my_account.balance<\/pre>\n\u6267\u884c\u7ed3\u679c\u662f10<\/p>\n
\u4f8b13.\u4f7f\u7528unittest\u6a21\u5757\u8fdb\u884c\u5355\u5143\u6d4b\u8bd5–Unit test with unittest<\/p>\n
import unittest\r\ndef median(pool):\r\n copy = sorted(pool)\r\n size = len(copy)\r\n if size % 2 == 1:\r\n return copy[(size - 1) \/ 2]\r\n else:\r\n return (copy[size\/2 - 1] + copy[size\/2]) \/ 2\r\nclass TestMedian(unittest.TestCase):\r\n def testMedian(self):\r\n self.failUnlessEqual(median([2, 9, 9, 7, 9, 2, 4, 5, 8]), 7)\r\nif __name__ == '__main__':\r\n unittest.main()<\/pre>\n\u6267\u884c\u8fc7\u7a0b\uff1a\u5c06\u4e2d\u95f4\u503c\u8ba1\u7b97\u51fa\u6765\u4e0e7\u6bd4\u8f83\uff0c\u5982\u679c\u76f8\u7b49\uff0c\u5219\u901a\u8fc7\u6d4b\u8bd5\u3002<\/p>\n
\u4f8b14.\u57fa\u4e8eDoctest\u7684\u6d4b\u8bd5–Doctest-based testing<\/p>\n
def median(pool):\r\n '''Statistical median to demonstrate doctest.\r\n >>> median([2, 9, 9, 7, 9, 2, 4, 5, 8])\r\n 7\r\n '''\r\n copy = sorted(pool)\r\n size = len(copy)\r\n if size % 2 == 1:\r\n return copy[(size - 1) \/ 2]\r\n else:\r\n return (copy[size\/2 - 1] + copy[size\/2]) \/ 2\r\nif __name__ == '__main__':\r\n import doctest\r\n doctest.testmod()<\/pre>\n\u6267\u884c\u7ed3\u679c\uff1a\u6ca1\u6709\u8f93\u51fa\u4efb\u4f55\u4e1c\u897f\uff0c\u8bf4\u660e\u4e2d\u95f4\u503c\u662f7<\/p>\n
\u4f8b15.\u4f7f\u7528itertools\u6a21\u5757<\/p>\n
from itertools import groupby\r\nlines = '''\r\nThis is the\r\nfirst paragraph.\r\n\r\nThis is the second.\r\n'''.splitlines()\r\n# Use itertools.groupby and bool to return groups of\r\n# consecutive lines that either have content or don't.\r\nfor has_chars, frags in groupby(lines, bool):\r\n if has_chars:\r\n print ' '.join(frags)\r\n# PRINTS:\r\n# This is the first paragraph.\r\n# This is the second.<\/pre>\n\u4f8b16.csv\u6a21\u5757\uff0c\u5143\u7ec4\u62c6\u5206\uff0c\u5185\u7f6e\u51fd\u6570cmp() — csv module, tuple unpacking, cmp() built-in<\/p>\n
import csv\r\n\r\n# write stocks data as comma-separated values\r\nwriter = csv.writer(open('stocks.csv', 'wb', buffering=0))\r\nwriter.writerows([\r\n ('GOOG', 'Google, Inc.', 505.24, 0.47, 0.09),\r\n ('YHOO', 'Yahoo! Inc.', 27.38, 0.33, 1.22),\r\n ('CNET', 'CNET Networks, Inc.', 8.62, -0.13, -1.49)\r\n])\r\n\r\n# read stocks data, print status messages\r\nstocks = csv.reader(open('stocks.csv', 'rb'))\r\nstatus_labels = {-1: 'down', 0: 'unchanged', 1: 'up'}\r\nfor ticker, name, price, change, pct in stocks:\r\n status = status_labels[cmp(float(change), 0.0)]\r\n print '%s is %s (%s%%)' % (name, status, pct)<\/pre>\n