urllib/beautifulsoup error in directory

obligatory warning that I am just learning python.

My question is why do I receive the error below after being prompted for a file name?[Errno 22] invalid mode ('r') or filename: 'text.txt'

My code: (it works but the html won't load)

import urllib
from BeautifulSoup import *

url = raw_input('Enter - ')

html = urllib.urlopen(url).read()
soup = BeautifulSoup(html)

tags = soup('a')
for tag in tags:
     print tag.get('href', None)

IOError: [Errno 22] invalid mode ('r') or filename: ''

Thank you for your help,

Edit: Traceback

Traceback (most recent call last):
  File "C:UsersabrowDesktopPythonbrowser.py", line 6, in <module>
    html = urllib.urlopen(url).read()
  File "C:Python27liburllib.py", line 87, in urlopen
    return opener.open(url)
  File "C:Python27liburllib.py", line 208, in open
    return getattr(self, name)(url)
  File "C:Python27liburllib.py", line 292, in open_http
    import httplib
  File "C:Python27libhttplib.py", line 79, in <module>
    import mimetools
  File "C:Python27libmimetools.py", line 6, in <module>
    import tempfile
  File "C:Python27libtempfile.py", line 35, in <module>
    from random import Random as _Random
  File "C:UsersabrowDesktopPythonrandom.py", line 2, in <module>
    handle = open(name, 'r')
IOError: [Errno 2] No such file or directory: 'text.txt'