Python核心编程（第二版）课后习题部分代码（3-4章）（持续更新）
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，由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）
'''@author: Riquelqi'''#!/user/bin/env pythonimport osls=os.linesepdef write(): content=[] #Input a filename. fname=raw_input("Please input a filename:%s"%ls) print "Please input content(Quit with 'q'):" lines=raw_input(">") while lines!="q": content.append(lines) lines=raw_input(">") afile=open(fname,"w") afile.writelines("%s%s"%(line,ls)for line in content) afile.close() print "DONE!",def read(): #input a filename fname=raw_input('Please input a filename:%s'%ls) #To be sure that the file pathexists if not os.path.exists(fname): print"File doesn't exists!" else: afile=open(fname,'r') for line in afile.readline(): print line, print '\nDONE!' if __name__=='__main__': input=raw_input(""" |Please input your commend| --|-------------------------|-- --|r | read |-- --|w | write |-- --|q | quit |-- |Please input your commend| """ ) while input!='q': if input=='r': read() elif input=='w': write() input=raw_input(""" |Please input your commend| --|-------------------------|-- --|r | read |-- --|w | write |-- --|q | 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）
'''@author: Riquelqi'''# To import like this isbetter than import types ,because we will use the property like that types.IntType...# It will select twicefrom types import IntType,FloatType,LongType,ComplexType def display_Number_Best(number): print number, 'is', if isinstance(number,(int,long,float,complex)): print 'a number of type:',type(number).__name__ else: print 'not a number at all',def display_Number_Worst(number): print number,'is' if 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+0.0j): print 'a number of type:',type(0.0+0.0j).__name__ else : print 'not a number at all'def display_Number_Better(number): print number,'is' if 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 of type:Complex' else: print 'not a number at all'def display_Number_Good(number): print number,'is' if type(number) == IntType: print 'a number of type: int' elif type(number) == FloatType: print 'a number of type:float' elif type(number) == LongType: print 'a number of type:Long' elif type(number) == ComplexType: print 'a number of type:Complex' else: print 'not a number at all' if __name__=='__main__': display_Number_Best(94) display_Number_Best(-64) display_Number_Best(10.3232) display_Number_Best(777777777777777777777777) display_Number_Best(10.0+10.0j) display_Number_Best('qq')# display_Number_Worst(554454)# display_Number_Worst(10.11)# display_Number_Worst(10.0+10.0j)# display_Number_Worst("sdfsdfsd") # display_Number_Better(45654)# display_Number_Better(10.0)# display_Number_Better(10.0+10.0j)# display_Number_Better(8888888888888888)# display_Number_Better('xxx')# display_Number_Good(21554)# display_Number_Good(8888888888888888888888888)# display_Number_Good(10.0)# display_Number_Good(10.0+10.0j)# display_Number_Good('my')
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