python 核心编程中makeTextFile.py和readTextFile.py 代码编写

#!usr/local/bin/python

"""
makeTextFile.py--create text file
"""

import os
ls = os.linesep

# get filename
while True:
    fname = input("please input file name:\n")
    if os.path.exists(fname):
        print("Error: %s already exists" % fname)
    else:
        break

# get file content lines
all = []
print("\n Enter 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!')

执行结果如下：

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#!/usr/local/bin/python

"""
readTextFile.py---read and display text file
"""

# get filename
filename = input("please input file name:\n")

# open file for reading
try:
    fobj = open(filename,'r')
except IOError as e:
    print("file open error",e)
else:
    # display contents
    for i in fobj:
        print(i)
    fobj.close()