Python笔记（二）文本的创建和读取

学习python已有数日，这是今天的战利品：

 

1.创建文本（createtext.py）

程序如下：

#create text file

 

import os
ls = os.linesep

print("******create file******")

 

#get filename
while True:
    fname = input("enter your file name:")
    if os.path.exists(fname):
        print("error: '%s' already exists"%fname)
    else:
        break

 

#get file content lines
all = []
print("\nEnter lines ('.'by itself to quit).\n")

 

#loop until user terminates input
while True:
    entry = input('> ')
    if entry == '.':
        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')

 

 

 

程序验证：

 

文本查看器查看：

 

 

 

2.读取文本文件（readtext.py)

程序如下：

#read and dislay text file
print("read and dislay text file")

fname = input("Enter filename:")
print        #display a empty line

#attempt to open file for reading
try:
    fobj = open(fname, 'r')
except ioError:
    print("file open error:")
else:
    #display contents
    print('_ '*10,)
    for eachLine in fobj:
        print(eachLine,end = '') #end参数，默认为'\n'
    fobj.close()
print('_ '*10)
print("Done")

 

程序验证：

 

 

 

Let me Go on...