quick python book

#!python3# -*- coding:utf-8 -*-# 8.9.3#打开指定路径中所有.txt文件#用户输入正则，将匹配行输出，输出文件名import re,ospat=input("输入要处理的文件夹绝对路径：")lis_dir=os.listdir(pat)lis_txt=[]for x in lis_dir: #取出.txt结尾的文件名,加进列表 if re.search(r‘\.txt$‘,x): lis_txt.append(x)text=input("输入你的自定义正则表达式：")regCom=re.compile(text)#regCom=re.compile(‘.*name.*‘)#循环处理文件for fi in lis_txt: fi=os.path.join(pat,fi) fi_open=open(fi) for fi_line in fi_open.readlines(): fi_reg=regCom.search(fi_line) if fi_reg: print(fi_reg.group()) fi_open.close()print("查找完成"

#!python3#运行 py mcb.pyw save spam ，剪贴板内容就关键字spam保存#py mcb.pyw spam 加载spam 对应内容到剪贴板#py mcb.pyw list 关键字列表到剪贴板#扩展多重剪贴板：#增加delete "Python Programming Quick Start" 8.9.1 practical exercises

Quick SortThe first one is very inefficient.1 defQuickSort (array, Low, high):2 ifLow >=High :3 return4I, j =Low , high5TMP =Array[low]6 whileTrue:7 whileARRAY[J] > tmp andI J:8J-= 19 ifI J:TenArray[i] =Array[j] Onei + = 1 A whileARRAY[J] andI J: -i + = 1 - ifI J: theARRAY[J] =Array[i] -J-= 1 - Else: - Break +Array[i] =tmp -QuickSort (array, Low, i-1) +QuickSort (Array, j + 1, Hi

[right] -Nums[right], nums[left] =Nums[left], Nums[right] - Else:#Left〉=right Jump out of the loop - Break inNums[left] =Key - returnLeft#at this time left==right so return to right is also possible to + - defQuick_sort (Nums, left, right): the ifLeft Right : *Key_index =Split_array (Nums, left, right) $Quick_sort (Nums, left, key_index-1)Panax NotoginsengQuick_sort (Nums, Key_index + 1, right) - the + if __name__=="__main__": A fromRandomImportRandint theNu

-*-__author__='Hzq'LST= [6,1,2,7,9,3,4,5,10,8]defMinddle_index (Lst,low,high): Start_index=low#far leftEnd_index=high#left and right side ifStart_index#precondition right greater than leftkey=Lst[start_index] #设置参照key whileEnd_index>Start_index: whileLst[end_index]>=key andEnd_index>Start_index:end_index-=1Lst[start_index],lst[end_index]=Lst[end_index],lst[start_index] whileLst[start_index] andEnd_index>Start_index:start_index+=1Lst[start_index],lst[end_index]=Lst[end_index],lst[start_index]#

007. Quick Start, learn by the side008. Variable TypePrint (type (variable)) see the types of variables now commonly used types of variables are integer, float, character type009. List Base ModuleType conversion: STR (8) converts 8 to a string of value the test character has no way to convert to a character type010. List index 011, loop structureLoop condition, in the for loop, called the loop body, the loop body indents 4 spaces or a TAB key012. Judg

-digital things. For example, by ipaomi = Turtle You can change Dr. Mi into a turtle, and you can use the Ipaomi variable to control the turtle's drawing. The following code, drawing the image and just the same, the difference is that we assign a turtle to the variable Ipaomi1 Import Turtle 2 3 Ipaomi = Turtle 4 ipaomi.shape ("turtle") 5 x = 6ipaomi.forward (x) 7 ipaomi.left (GB) 8 Ipaomi.forward (x) 9 Ipaomi.exitonclick ()PracticeTry to draw a house (use a variable to do it, try to ad

In this paper, we describe the application of Python Quick Find algorithm and share it for your reference. The implementation method is as follows: Import randomdef partition (List_object,start,end): random_choice = Start #random. Choice (Range (start,end+1) ) #把这里的start改成random () is more efficient x = List_object[random_choice] i = start j = End While True: While List_object[i] break List_o

This article mainly introduces the Python requests using the Quick Start tutorial, using requests to send network requests is very simple, how to do, please refer to this article Get started quickly Can't wait for it? This page provides a good guide on how to get started with requests. It is assumed that you have installed the requests. If not, go to install a section to see it. First, make sure that: Requ

Differences:The Perl transfer list slice actually points to the same element in the parent list, which is determined by the data structure of Perl. While passing slice in Python is a new list, so parameter passing is slightly different. An example shows the differences in parameters passing through Perl:[Plain] view plaincopySub test {$ _ [2] = 'testing ';}@ X = (1 .. 10 );Test (@ x [3 .. 8]);Print "@ x ";Output:1 2 3 4 5 testing 7 8 9 10

Python is a simple language, because there are a lot of modules in use, as well as Linux also have to understand the use of command "man", "help", and Python also has.Use the following command to view >>> dir (__builtins__)>>> dir (__builtins__)[' Arithmeticerror ', ' assertionerror ', ' attributeerror ', ' baseexception ', ' blockingioerror ', ' brokenpipeerror ', ' Buffererror ', ' byteswarning ', ' child

#!/usr/bin/env python#-*-coding:utf-8-*-def quick_sort (arr): L = Len (arr) _quick_sort (arr, 0, L-1) tmp = 0def _quick_sort (arr, start, end): print start,end if start >= end: return middle = partition (arr, Start, end) _quick_sort (arr, start, middle-1) _quick_sort (arr, middle + 1, end) def partition (arr, start, end): i = (start+end)/2 while (Start 　　Python for