Bluehost-Premature end of headers in python script

Question

I have a website and I have 2 python cgi scripts in a cgi-bin folder under my website. Now everytime it tries to load either of these 2 python cgi scipts, server returns 500 error, and there's the premature end of errors infamous error.

So I tried something new. I made a very simple python cgi-script:

#!/usr/bin/python -u

print "Content-type: text/html\n\n"
print "Hello World!"

I named this hello_world.py, put it in the cgi-bin with the other 2 python scripts, and I ran the following link: http://steap.co/cgi-bin/hello_world.py, and it amazingly returned "Hello World!".

This showed me that something was wrong with my python scripts, but I don't know what. This is my script:

Steap.py

#!/usr/bin/python -u
#Steam64 ID - 76561198041707719
import urllib
import cgi, cgitb
import itertools
import urllib2
import time
from datetime import datetime
from bs4 import BeautifulSoup
from flask import Flask, jsonify, render_template, redirect
import requests
import json
import xml.etree.ElementTree as ET
from xml.dom.minidom import parseString
import sys

//code goes here

print "Content-type: text/html\n\n"
print "<div id=\"phisher-users\"></br></br>"
print getFriendList(steeam)
print "</div>"
print "<div id=\"phisher-ids\" style=\"display: none;\">"
print grabPhisherIDs()
print "</div>"

And now when the server tried to load this script, I got some more information:

Traceback (most recent call last):
  File "Steap.py", line 9, in 
    from bs4 import BeautifulSoup
ImportError: No module named bs4
[Sat Dec 06 09:58:07 2014] [error] [client 174.61.70.33] Premature end of script headers: Steap.py

Why is this happening? I custom installed python 2.7 in my website, and I used pip to all all the custom modules above (such as bs4, flask, etc.).

Any help is greatly appreciated.

Answer 1

I have both 3.2.1 and 4.3.2 version of BeautifulSoup.

$pip freeze
BeautifulSoup==3.2.1
beautifulsoup4==4.3.2

You can import BeautifulSoup like this:

>>> from bs4 import BeautifulSoup
>>> from BeautifulSoup import BeautifulSoup

You can check the version of BeautifulSoup like this on Python terminal.

>>> import bs4
>>> bs4.__version__
'4.3.2'
>>> import BeautifulSoup
>>> BeautifulSoup.__version__
'3.2.1' 

---

From Python Doc Porting code to BS4

Most code written against Beautiful Soup 3 will work against Beautiful Soup 4 with one simple change. All you should have to do is change the package name from BeautifulSoup to bs4. So this:

from BeautifulSoup import BeautifulSoup

becomes this:

from bs4 import BeautifulSoup

If you get the ImportError “No module named BeautifulSoup”, your problem is that you’re trying to run Beautiful Soup 3 code, but you only have Beautiful Soup 4 installed.

If you get the ImportError “No module named bs4”, your problem is that you’re trying to run Beautiful Soup 4 code, but you only have Beautiful Soup 3 installed.