python 文本的读写功能整合

发布时间：2019-07-14 10:00:28编辑：auto阅读（1355）

    功能整合
    程序如下：
    print("*creating and reading text file in on programe*")
    while True:
        print("\n=========Meau======")
        print("a. create text file")
        print("b. read text file")
        print("q. quit")
        print(" "*11,"All by Neo")
        print('- '*10)
        choice = input("\nWhat do U want ?:")

        if  choice == 'a':
            print("\n\n***create text file***")
            import os
            ls = os.linesep
            #get filename
            while True:
                fname = input("Enter your file name:")
                if os.path.exists(fname):
                    judge = input("File already exists,try to overwrite it(y/n)?:")
                    if judge == 'y':
                        os.remove(fname) #if 'y' ,remove old file
                        break
                    if judge == 'n':
                        break
                else:
                    break

            #get file content lines
            all = []
            print("\nEnter your lines('quit'by itself to quit).")
            while True:
                entry= input('>')
                if entry == 'quit':
                    break
                else:
                    all.append(entry)
     
            #write lines to file with proper line-ending
            fobj = open(fname, 'w')
            fobj.writelines(['%s%s' %(x,ls) for x in all])
            fobj.close()
            print('Done')

        if choice == 'b':
            #read and display text file
            print("\nread and display text file")
            fname = input("\n\nEnter the filename:")
            print
     
            #attemp to open file for reading
            try:
                fobj = open(fname,'r')
            except IOError:
                print("file open error:")
            else:
                #display contents
                print('- '*5,"contents below",'- '*5)
                for eachline in fobj:
                    print(eachline,end = '')
                fobj.close()
            print('- '*7,"Done",'- '*7)
     
        if choice == 'q':
            break
     
    print ("\nDone,bye")
               
    程序功能有限
    对文本的编辑功能尚在学习中
    try more

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