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POPython 3.2 lxml fill and submit form, select multiple, how to do it? value not working
 

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  1. POPython 3.2 lxml fill and submit form, select multiple, how to do it? value not working
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    <p>Great page this one, coming from the perl world and after several years of doing nothing, I've re-started to program again (this web page didn't exist, how things change). And now, after a 2 full-days of searching, I play the last card of asking here for help.</p> <p>Working under mac environment, with python 3.2 and lxml 2.3 (installed following www.jtmoon.com/?p=21), what I am trying to do:</p> <ul> <li>web: <a href="http://biodbnet.abcc.ncifcrf.gov/db/db2db.php" rel="nofollow">http://biodbnet.abcc.ncifcrf.gov/db/db2db.php</a></li> <li>to fill the form that you find there</li> <li>to submit it</li> </ul> <p>My code. I put several attempts and the output code.</p> <pre><code>from lxml.html import parse, submit_form, tostring page = parse('http://biodbnet.abcc.ncifcrf.gov/db/db2db.php').getroot() page.forms[0].fields['input'] = 'GI Number' page.forms[0].inputs['outputs[]'].value = 'Gene ID' page.forms[0].fields['hasComma'] = 'no' page.forms[0].fields['removeDupValues'] = 'yes' page.forms[0].fields['request'] = 'db2db' page.forms[0].action = 'http://biodbnet.abcc.ncifcrf.gov/db/db2dbRes.php' page.forms[0].fields['idList'] = '86439006' submit_form(page.forms[0]) </code></pre> <p>Output:</p> <pre><code>File "/Users/gerard/Desktop/barbacue/MGFtoXML.py", line 30, in &lt;module&gt; page.forms[0].inputs['outputs[]'].value = 'Gene ID' File "/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/site-packages/lxml/html/__init__.py", line 1058, in _value__set "You must pass in a sequence") TypeError: You must pass in a sequence </code></pre> <p>So, since that element is a multi-select element, I understand that I have to give a list</p> <pre><code>page.forms[0].inputs['outputs[]'].value = list('Gene ID') </code></pre> <p>Output:</p> <pre><code>File "/Users/gerard/Desktop/barbacue/MGFtoXML.py", line 30, in &lt;module&gt; page.forms[0].inputs['outputs[]'].value = list('Gene ID') File "/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/site-packages/lxml/html/__init__.py", line 1059, in _value__set self.value.clear() File "/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/site-packages/lxml/html/_setmixin.py", line 115, in clear self.remove(item) File "/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/site-packages/lxml/html/__init__.py", line 1159, in remove "The option %r is not currently selected" % item) ValueError: The option 'Affy ID' is not currently selected </code></pre> <p>'Affy ID' is the first option value of the list, and it is not selected. But what's the problem with it?</p> <p>Surprisingly, if I instead put</p> <pre><code>page.forms[0].inputs['outputs[]'].multiple = list('Gene ID') #page.forms[0].inputs['outputs[]'].value = list('Gene ID') </code></pre> <p>Then, somehow lxml likes it, and move on. However, the multiple attribute should be a boolean (actually it is if I print the value), I shouldn't touch it, and the "value" of the item should actually point to the selected items, according to the lxml docs.</p> <p>The new output</p> <pre><code>File "/Users/gerard/Desktop/barbacue/MGFtoXML.py", line 87, in &lt;module&gt; submit_form(page.forms[0]) File "/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/site-packages/lxml/html/__init__.py", line 856, in submit_form return open_http(form.method, url, values) File "/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/site-packages/lxml/html/__init__.py", line 876, in open_http_urllib return urlopen(url, data) File "/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/urllib/request.py", line 138, in urlopen return opener.open(url, data, timeout) File "/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/urllib/request.py", line 364, in open req = meth(req) File "/Library/Frameworks/Python.framework/Versions/3.2/lib/python3.2/urllib/request.py", line 1052, in do_request_ raise TypeError("POST data should be bytes" TypeError: POST data should be bytes or an iterable of bytes. It cannot be str. </code></pre> <p>So, what can be done?? I am sure that with python 2.6 I could use mecanize, or that perhaps lxml could work? But I really don't want to code in a sort-of deprecated version. I am enjoying a lot python, but I am starting to consider going back to perl. Perhaps this could be a smart movement??</p> <p>Any help will be hugely appreciated</p> <p>Gerard</p> <ul> <li>Reading in this forum, I find pythonpaste.org, could it be a replacement for lxml?</li> </ul>
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    1. CONo Paste doesn't do any of the things lxml does. However, mechanize could. http://pypi.python.org/pypi/mechanize/0.1.7b
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      1. USLennart Regebro
 

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