[Tutor] odd behavior when renaming a file
joel.goldstick at gmail.com
Thu May 10 23:02:08 CEST 2012
On Thu, May 10, 2012 at 4:18 PM, Dave Angel <d at davea.name> wrote:
> On 05/10/2012 12:56 PM, Alan Gauld wrote:
>> On 09/05/12 20:26, Joel Goldstick wrote:
>>> import os
>>> def pre_process():
>>> if os.path.isfile('revelex.csv'):
>>> os.rename('revelex.csv', 'revelex.tmp')
>>> print "Renamed ok"
>>> print "Exiting, no revelex.csv file available"
>>> out_file = open('revelex.csv', 'w')
>>> # etc.
>>> When I run the code above it works file if run from the file. But
>>> when I import it and run it from another file it renames the file but
>>> then prints "Exiting, no revelex.csv file available"
>> I don;t know the reason but are you sure you want to open the file
>> that you have just renamed?
>> def pre_process():
>> if os.path.isfile('revelex.csv'):
>> os.rename('revelex.csv', 'revelex.tmp')
>> out_file = open('revelex.csv', 'w')
>> # etc.
>> I would expect the open() to fail...
> But he's opening it for WRITE, so it gets created just fine.
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I have to process a csv file from a business partner. Oddly (?) they
don't quote text fields, and the Title field sometimes contains
commas. So I wrote some code to count the commas in each line and if
there were too many, I removed the extras and wrote the cleaned up
file to the original filename for the rest of what I have to with that
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