I have written a script that reads and displays text
files:
#!/usr/bin/env python
'readTextFile.py -- read and display text file'
import os
# get filename
while True:
fname = raw_input('Enter file name: ')
print
if os.path.exists(fname):
fobj = open(fname, 'r')
for eachLine in fobj:
print eachLine,
fobj.close()
else:
print"*** File doesn't exist"
break
However, whenever I run the script, I get this result:
[EMAIL PROTECTED] ./chap3 314> python readTextFile1.py
Enter file name: datefile
Fri Sep 7 22:13:03 PDT 2007
Traceback (most recent call last):
File "readTextFile1.py", line 13, in ?
for eachLine in fobj:
ValueError: I/O operation on closed file
The original script appeared in 'Core Python
Programming' in this form:
#!/usr/bin/env python
'readTextFile.py -- read and display text file'
# get filename
fname = raw_input('Enter file name: ')
print
# attempt to open file for reading
try:
fobj = open(fname, 'r')
except IOError, e:
print"*** file open error:", e
else:
# display contents to the screen
for eachLine in fobj:
print eachLine,
fobj.close()
I modified the script as an answer to one of the end
of chapter questions. Basically, I am supposed to
rewrite the script, so that runs with 'try' and
'except'.
What is causing the error message? I thought the file
was opened earlier in the script.
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