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忽略抛出的异常：

常用的写法：

try:
    os.remove('somefile.tmp')
except OSError:
    pass
   
   

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//JavaScript callee 用法示例

function factorial(num) {
    if (num <= 1) {
		return 1;
	} else {
		return num * arguments.callee(num - 1);
	}
}
 

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# via: http://www.oschina.net/code/snippet_16840_1568

1.生成随机数
          import random    #这个是注释，引入模块
          rnd = random.randint(1,500)#生成1-500之间的随机数

2.读文件

         f = open("c:\\1.txt","r")
         lines = f.readlines()#读取全部内容

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# This is an asynchronous task scheduler based on coroutines
import socket
import select
from collections import deque

class YieldPoint:
    def yield_task(self, task):
        pass
    def resume_task(self, task):
        pass

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"""
This is a RPC server/client implementation using socket
* It authenticate the client with a secret shared by client/server
* It uses JSON to serialize the function call payload
"""
import socket
import random, string
import hmac
import json
import threading

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from datetime import date
import os

# A simple script to open a new markdown todo file every day. 

year = date.today().year
month = date.today().strftime('%b').lower()
day = date.today().day

filename = os.path.join(str(year) + '_' + month, str(day) + '.md')

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import re
s = "1991-02-28"
re.sub(r"(\d{4})-(\d{2})-(\d{2})", r'\1/\2/\3')
Out[6]: '1991/02/28'

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from future.builtins.disabled import *

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set1 = {1,2,3,4}
set2 = {3,4,5,6}

set1.intersection(set2)#交集
set1.difference(set2)#差集

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from itertools import groupby

def height_class(h):
    if h> 180:
        return "tall"
    elif h<160:
        return "short"
    else:
        return "middle"