python textbook with exercises

#!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

1. Use while loop input 1 2 3 4 5 6 8 9 10Code:0 While I : 1 if7: continue Print (i)Results:2. For all numbers of 1-100Code:i = 0sum = 0while iResults:3. All odd numbers in output 1-10:i = 0while I Results:4. All even numbers in the output 1-1000 while One : 1 if 2 0 : print (i)Results:5, Beg 1-2+3-4+5 ... 99 of all numbers of the andi =0J_sum=0O_sum=0sum=0 whileI About: I+=1 ifI2==1: J_sum= J_sum +IifI2==0: O_sum= O_sum +I sum=j_sum-o_sumprint (j_sum) prin

= [] R = Range (1, 5) for a in r:for B in R:for C in R: If a! = B and a! = C and b! = C:d.append ("%d%d%d"% (a, B, c)) print (d, end= ",") print ("%d"% Len (d)) Answer3 () def answer4 (): "" "in the list use the for and if operations to iterate the data" "" Print ("Answer four", end= ":") arr = [1, 2, 3, 4] NewList = ["%d%d%d"% (I, j, K) for I in Arr. J in arr. K in arr if I! = J and I! = k and J! = K] Print (NewList, End= ",") print ("%d"% len (newlist)) answer4 () def answer5 ():

#title: Decompose a positive integer into factorization. For example: Enter 90 and print out 90=2*3*3*5. #My method should be more concise than the Internet, but recursion may be slown = input ('Please enter a positive integer:') n=int (n) X=str (n) m= []defZhengchu (n): forIinchRange (2,n+1): ifn% i = =0:k= Int (n/i) m.append (i)returnZhengchu (k)Else: Continuey= (str (x) forXinchm)Print('%s ='X'*'. Join (y)) Zhengchu (n)"Python

# title: A ball from the height of 100 meters of freedom falling, each landing back to the original height of half, and then down, to ask it to fall on the 10th time, the total number of meters? How high is the 10th time rebound?#这个答案可以自定义任何高度和反弹次数, come to the conclusiondef Dist (x,y,s): while y >0: + = (1.5*x )= 0.5*x = y-1 return Dist (x,y,s) Print (x,s) dist (100,10,0)"Python

3, Title: An integer, it plus 100 is a complete square number, plus 168 is a complete square number, what is the number?x+100 = N*nx+100+168 = m * mSo(m+n) * (m-n) =168#title: An integer, which plus 100 is a complete square number, plus 168 is a complete square number, what is the number? I= Range (1,100) forMinchI: forNinchi:k= (m+n) * (M-N)ifK = = 168 andM >N:#print (m,n)x = (n * n-100) y= (M * m-268) ifx = =y:Print(x)"Python

#title: If a number is exactly equal to the sum of its factors, this number is called the "end number". For example, 6=1+2+3. Programming to find all the finished numbers within 1000. defsuoyou (n): #找到所有因子 s= [] forIinchRange (1,n+1): ifn% i = =0:s.append (i) s= S[:len (s)-1] x=0#print (' All silver ', s) forIinchs:x+=IreturnxdefZhengchu (n): #因式分解 forIinchRange (2, n + 1): ifn% i = =0:k= Int (n/i) m.append (i)returnZhengchu (k)Else: Continue ifm = =[]: N= n

2, Title: The bonus awarded by the enterprise according to the profit commission. Profit (I) less than or equal to $100,000, the bonus can be raised by 10%, the profit is higher than $100,000, less than $200,000, the portion of less than 100,000 yuan by 10% commission, higher than the portion of 100,000 yuan, a commission of 7.5%, 200,000 to 400,000, higher than 200,000 yuan, can commission 5% ; Between 400,000 and 600,000 is higher than the portion of 400,000 yuan, can commission 3%, 600,000 to

contains uppercase and lowercase letters and numbers, randomly appear. User input Verification code is not case-sensitive, as long as the characters appear in the correct order to pass validation. Please write a program to complete the verification Code matching verification, assuming that the current display of the verification code is ' qs2x '. If the user enters the correct code, the output "Verification code is correct", the input error output "code error, please re-enter". s = "Qs2

to program,,,,") the Break the elif "*" in passwd: the print ("The password cannot contain the ' * ' number!") You also have ", Count," chance ", end=") - Continue in Else: the Print ("Password entered incorrectly!") You still have ", count-1, ' Chance!" ', end= ') the count-=1" " About the ####################### Tri-color Ball the the " "print (' Red\tyellow\tblue ') + For red in range (0,4): - For yellow in range (0,4): the For Blue in range (2,7):Bayi if red + yellow + Blue ==8: the prin

illegal characters, then replace the illegal characters with the same number of * (such as Wang er), and then add to the user_list, if there is no illegal characters, then added directly to User_list, each time the addition of the successful, the new user name, the password was added.# user_list = [# {' username ': ' Barry ', ' Password ': ' 1234 '},# {' username ': ' Alex ', ' Password ': ' Asdf '},# ]# board = [' Zhang San ', ' Li Xiaoxi ', ' King two leper ']# while 1:# username=input (' use