Python核心编程(第二版)第三,四章课后习题部分答案代码.docx

Python核心编程（第二版）第三,四章课后习题部分答案代码Python核心编程（第二版）课后习题部分代码（3-4章）（持续更新）文章分类:Python编程本人近期研究了下Python,所用的书籍主要是Python核心编程（第二版）等，在此期间，我对书后的习题（编码部分）进行了实现，rti 于此书课后没有答案（英文版的答案也不全，我看的是电子书，不知道买的书后有没有答案），所以，在此把我的实现分享一下，希望对初学者有帮助。

由于本人水平有限，在实现的编码中肯定有不合理的地方，希望大虾指出，我及时更正，大家共同交流。

3-12 （第三章当时做的时候有些没实现，有时间补上）Python代码,，，，,@author: Riquelqi，，，#!/user/bin/env pythonimport osls=os.linesepdef write（）:content=[]ttlnput a filename・fname=raw_input（"Please input a filename:%s〃％ls）print "Please input content （Quit with lines=raw input （〃＞〃）while lines!二〃q〃：content. append（lines）lines=raw_input（“〉“）afile=open（fname, "w〃）afile. writelines（〃％s%s〃％（line, Is）for line in content）afile. close（）print 〃D0NE!〃，def read ():ttinput a filenamefname=raw_inputPlease input a #To be sure that the file path if notos.path ・exists(fname): print ，zFiledoesn't exists!，z else:af ile=open(fname,' r ) for line in afile.readlineO print line,print '\nD0NE!‘if _name_二二' main ―':input 二 rawinput (“"Please input your commend| —r 1 — read - 一一 w 1 write - —q 1 quit— Please input your commend〃 〃 〃）while input!二'q':if input 二二'r :read ()elif input 二二'w': write () input=raw_input (〃〃〃 Please input your commend -I--| r read一一| wwrite filena.me:%s' %ls) exists©author: Riquelqi，，，#!/user/bin/env pythonimport osIs 二os. linesepdef write():content ：]]#Input a filename ・ fname=raw_input(''Please input afilename:%s ，z %ls) print "Please input content (Quit with 'q'):〃 lines 二rawinput (“＞〃)while lines!=〃q 〃：content, append(1 ines) lines=raw_input (“＞〃) afile=open(fname, 〃w 〃)af ile .writel in es C ，%s%s，，%(line, Is) for line in con tent)af ile. close ()print 〃D0NE!〃，def read ():#input a filename fname=raw_input C Please input afilename:%s J %ls)#To be sure that the file path exists if not os.path ・exists(fname):print 〃File doesn ，t exists!/z else:afile=open(fname,' r ) for line in afile ・readline(): print ― qPlease 〃 〃 〃quit input your commend|line, print '\nD0NE!'if _name_二二'—main―':input 二rawinput (“"Please input your commendr readw write1 q quitPlease input your commendwhile input!二'q':if input二二'r :read ()elif input二二'w': write ()input 二rawinput (“"Please input your commend| -I -----| r read |一一w write-- q I quit |Please input your commend 〃〃〃)4-6(第四章感觉没有什么，不过以下我的这段练习，有助于4-6 题的理解，并且这段代码也说明了很多知识)Python代码，，，，，@a.uthor: Riquelqi，，，#To import like this is better than import types , because we willuse the property like that types.1ntType・・・#It will select twicefrom types import IntType, FloatType, LongType, ComplexTypedef display_Number_Best(number):print number, ' is',if isinstance(number, (int, long, float, complex)):print 'a number of type:J , type (number)._name_ else:print 'not a number at all',def display_Number_Worst(number):print number,' isif type (number)==type(0):print 'a number of type / , type(0)._name_ elif type (number) =type (0L):print 'a number of type:type(0L)・_name_ elif type (number) =type (0.0):print 'a number of type / , type(0.0)._name_ elif type (number) =type (0. 0+0. Oj):print 'a number of type / , type(0・0+0・0j)・_name__ else :print 'not a number at alTdef display_Number_Better(number):print number,' isif type(number) is IntType: print 'a number of type: int，elif type (number) is FloatType: print 'a number of type:float，elif type(number) is LongType:print 'a number of type:Long，elif type(number) is ComplexType: print 'a number oftype:Complex，else:print 'not a number at alTdef display_Number_Good(number):print number,' is'if type (number)二二IntType: print 'a number of type: int，elif type (number)二二FloatType: print 'a number oftype:float，elif type(number)二二LongType:print 'a number of type:Long，elif type(number)二二ComplexType: print 'a number of type:Complex，else:print 'not a number at alTif _name_=' _main_':d i sp1ay_Numb er_Be s t(94) display_Number_Best(-64)disp1ay_Number_Best(10. 3232)display_Number_Best(777777777777777777777777)display_Number_Best(10. 0+10. Oj) display_Number_Best C qq') # d i s p1ay_Numb er_Wor s t(554454)#display_Number_Worst(10. 11)#display_Number_Worst 仃0. 0+10. Oj)# d i s p1ay_Numb er_Wor s t Csdfsdfsd")# d i s p1ay_Numb er_B e 11 er(45654)# d i sp1ay_Number_Be11er(10. 0)#display_Number_Better(10. 0+10. Oj)# d i s p1ay_Numb er_B e 11 er(8888888888888888)#display_Number_Better C xxx')# d i s p1ay_Numb er_Good(21554)#display_Number_Good(8888888888888888888888888)#di sp1ay_Number_Good(10. 0)#display_Number_Good(10. 0+10. Oj) #display_Number_Good (' my，)。