《Python核心编程》部分代码习题实践(持续更新)

第三章

3-10 交换异常处理方式

代码：

#makeTextFile.py

#!/usr/bin/env python

'makeTextFile.py'
import os
ls = os.linesep

#get File name

while True:
    fname = raw_input("Enter file name: ")
    try:
        fobj = open(fname,'w')
    except IOError, e:
        print "File open Failed"
    else:
        break;

#get file contents lines

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

#loop until user terminate input

while True:
    entry = raw_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.write('\n',join(all))
fobj.close()
print "DONE"


######################################

#readTextFile.py

#!/usr/bin/env python

'readTextFile.py'
import os

#get filename
fname = raw_input('Enter filename: ')
print

#attempt to open file for reading

if os.path.exists(fname):
    fobj = open(fname,'r')
    for eachLine in fobj:
        print eachLine,

fobj.close()

View Code