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# Copyright 2000 by Jeffrey Chang. All rights reserved.
# This code is part of the Biopython distribution and governed by its
# license. Please see the LICENSE file that should have been included
# as part of this package.
"""
Provides code to access SCOP over the WWW. The main SCOP web page
is available at:
http://scop.mrc-lmb.cam.ac.uk/scop/
Functions:
search Access the main CGI script.
_open
"""
import string
import urllib
from Bio import File
def search(pdb=None, key=None, sid=None, disp=None, dir=None, loc=None,
cgi='http://scop.mrc-lmb.cam.ac.uk/scop/search.cgi', **keywds):
"""search(pdb=None, key=None, sid=None, disp=None, dir=None, loc=None,
cgi='http://scop.mrc-lmb.cam.ac.uk/scop/search.cgi', **keywds)
Access search.cgi and return a handle to the results. See the
online help file for an explanation of the parameters:
http://scop.mrc-lmb.cam.ac.uk/scop/help.html
Raises an IOError if there's a network error.
"""
params = {'pdb' : pdb, 'key' : key, 'sid' : sid, 'disp' : disp,
'dir' : dir, 'loc' : loc}
variables = {}
for k in params.keys():
if params[k] is not None:
variables[k] = params[k]
variables.update(keywds)
return _open(cgi, variables)
def _open(cgi, params={}, get=1):
"""_open(cgi, params={}, get=1) -> UndoHandle
Open a handle to SCOP. cgi is the URL for the cgi script to access.
params is a dictionary with the options to pass to it. get is a boolean
that describes whether a GET should be used. Does some
simple error checking, and will raise an IOError if it encounters one.
"""
# Open a handle to SCOP.
options = urllib.urlencode(params)
if get: # do a GET
fullcgi = cgi
if options:
fullcgi = "%s?%s" % (cgi, options)
handle = urllib.urlopen(fullcgi)
else: # do a POST
handle = urllib.urlopen(cgi, options)
# Wrap the handle inside an UndoHandle.
uhandle = File.UndoHandle(handle)
# Should I check for 404? timeout? etc?
return uhandle
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