Q:

IOError opening an existing file with Python

Running the following code:
import os
import datetime
import ftplib

currdate = datetime.datetime.now()
formatdate = currdate.strftime("%m-%d-%Y %H%M")

def log():

    fqn = os.uname()[1]
    ext_ip = urllib2.urlopen('http://whatismyip.org').read()
    log = open ('/Users/admin/Documents/locatelog.txt','w')
    log.write(str("Asset: %s " % fqn))
    log.write(str("Checking in from IP#: %s" % ext_ip))
    smush = str(fqn +' @ ' + formatdate)
    os.rename('/Users/admin/Documents/locatelog.txt','/Users/admin/Documents/%s.txt' %  smush )

    s = ftplib.FTP('10.7.1.71','username','password')
    f = open('/Users/admin/Documents/%s.txt' % smush,'r')
    s.storbinary("STOR /Users/admin/Documents/%s.txt" % smush,f)

Generates the following error:
ftplib.error_perm: 550 /Users/admin/Documents/678538.local @ 02-24-2010 1301.txt: No such file or directory

I have a feeling something is amiss in this line :
s.storbinary("STOR /Users/admin/Documents/%s.txt" % smush,f)

678538 is the host I am testing on...using Mac OS X 10.5 and Python 2.5.1

A:

Shouldn't it bef = open('/Users/admin/Documents/%s.txt' % smush,'r') ? notice the / in front of Users
If you dont put the first /, the script will think the path to the file is relative to the current directory (where the script is run from)
Edit:
I m not too familiar with Python (I wish) but shouldnt it be:
s.storbinary('STOR /Users/admin/Documents/%s.txt' % smush,f) ?
In your example, Python will treat your string as literal and you want to interpolate the value of smush with %s 
Edit 2:
Does the directory /Users/admin/Documents/ exist on your server? If not, I think you will have to create them before copying anything. (Since the error message is about some files/folders missing).
You can create them yourself first. Run your script. If the file is copied successfully, then you can add the creation of the directories from within your script.

A:

Edit: 
This version works: Problem was that I was writing to buffer, and not to file.
import os
import urllib2
import datetime
import ftplib

currdate = datetime.datetime.now()
formatdate = currdate.strftime("%m-%d-%Y-%H%M")

def log():

    fqn = os.uname()[1]
    ext_ip = urllib2.urlopen('http://whatismyip.org').read()
    smush = str(fqn + formatdate)
    s = ftplib.FTP('10.7.1.71','username','password')
    f = open('/Users/admin/Documents/%s.txt' % smush,'w')
    f.write(str("Asset: %s " % fqn))
    f.write('\n')
    f.write(str("Checking in from IP#: %s" % ext_ip))
    f.write('\n')
    f.write(str("On: %s" % formatdate))
    f.close
    f = open('/Users/admin/Documents/%s.txt' % smush,'rb')
    s.storbinary('STOR %s.txt' % smush , f)
    s.close
    f.close

