Execute a python script stored on a web server using beautiful soup

I am trying to create a simple form/script combination that will allow someone to replace the contents of a certain div in an html file with the text they input 开发者_如何学运维in an html form on a separate page.

The script works fine if everything is local : the script is local, i set the working directory to where my html file is, and i pass the parameter myself when I run the script. When I load everything to my hosted site server, however, it gives me a 500 error.

I have been able to execute a simple python script that i stored on my site, and JustHost, my hosting service, has told me that BeuatifulSoup has been added to my server.

Here is the script, with the parameter "textcontent" coming from an html form which works fine. My scirpt is rooted under public_html/cgi-bin/ and the html I am trying to read and write resides on the root of public_html. I'm guessing either the html file isn't being found or beautifulsoup isn't actually available on my server...anyway way to test that??

#!/usr/bin/python
#import beautifulsoup
from BeautifulSoup import BeautifulSoup
# Import modules for CGI handling 
import cgi, cgitb, traceback


# Create instance of FieldStorage 
try:
    form = cgi.FieldStorage()    
    def text_replace(word):
    f = open('/public_html/souptest2.html', 'r')
    soup = BeautifulSoup(f.read())
    f.close()

    text = soup.find('div', attrs={'id': 'sampletext'}).string
    text.replaceWith(word)

    deploy_html = open('/public_html/souptest2.html', 'w')
    deploy_html.write(str(soup))
    deploy_html.close()

# Get data from fields
    if form.getvalue('textcontent'):
        text_content = form.getvalue('textcontent')
        text_replace(text_content)
    else:
        text_content = "Not entered"
except:
    deploy_html = open('../souptest2.html', 'w')
    traceback.print_exc(deploy_html)
    deploy_html.close() 

I have tried to load that as a script and run it from a url and still get a 500 error, with no output on my output page in order to debug using traceback...

Do you have a shell account on your host? If so, try running the server's version of Python in interactive mode and type:

>>> import BeautifulSoup

If the module doesn't exist, you should get an ImportError.

Alternatively, try putting cgitb.enable() immediately following the line import cgi, cgitb. This should give you the traceback of any exceptions raised. If this still doesn't work, it's likely that your webserver isn't finding the script. Double-check your configuration with your hosting provider.

There is a whole bunch of advice on how to debug CGI scripts in Python's CGI documentation, found here.

EDIT: Edited to actually take advantage of the cgitb module rather than try to handroll a solution using traceback.

To test do something like:

try:
  from BeautifulSoup import BeautifulSoup
except Exception, e:
  print "An error occured importing soup", e

You need to fix the output, such that you would actually see it, or alternatively write something to a file.