python 核心编程 第十章

第6题

#!/usr/bin/env python
import sys
def safeOpen(fileName,openType):
    try:
        files = open(fileName,openType)
    except IOError:
        return None
    else:
        return files 

FL = safeOpen((sys.argv)[1],(sys.argv)[2])       
if FL == None:
    print "%s Can't Open."%((sys.argv)[1]),
else:
    for lines in FL:
        print lines,
    FL.close()

第8题

#!/usr/bin/env python
def safeInput():
    try:
        inString = raw_input()
    except (EOFError,KeyboardInterrupt):
        return None
    else:
        return inString

inStr = safeInput()
print inStr