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"""
多进程示例
"""
import time
from multiprocessing import Pool


def run(fn):
    time.sleep(1)
    print(fn)

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from difflib import SequenceMatcher

def similar(a, b):
    return SequenceMatcher(None, a, b).ratio()

"""
>>> similar("Apple","Appel")
0.8
>>> similar("Apple","Mango")
0.0

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import string
import random


# python 3.6.1以下
text = ''.join(random.choice(string.ascii_letters + string.digits) for _ in range(15))
print(text)

# python 3.6.1
text = ''.join(random.choices(string.ascii_letters + string.digits, k=15))

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Net;
using System.IO;

namespace ConsoleApp1
{

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1. 全局替换字符串 %s#old string#new string#g