Dict KeyError in cgi-bin script, works fine via console

[dbsoundman]

Hi all, I'm experiencing a KeyError when I try to run the following cgi-bin script via my web form. The error indicates the problem resides on line 13 of the script: the key, 'yellow', was not found, even though it's clearly shown in the error message output (it shows the contents of the loaded dict).

#!/usr/bin/env python3.5 import cgi import cgitb import pickle import html cgitb.enable() form = cgi.FieldStorage() print("Content-type: text/html\n\n") userVars = pickle.load(open("/opt/RampPi/RampPi.CFG", "rb")) userVars['yellow'] = int(form["yellow"].value) pickle.dump(userVars, open("/opt/RampPi/RampPi.CFG", "wb")) text = form["yellow"].value print("<h1>Save successful</h1>") print(html.escape(text))

What's interesting is that if I run the exact same commands in the Python3.5 console, it works perfectly:

$ python3.5 Python 3.5.2 (default, Nov 17 2016, 17:05:23) [GCC 5.4.0 20160609] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import pickle >>> userVars = pickle.load(open("/opt/RampPi/RampPi.CFG", "rb")) >>> userVars['yellow'] 10 >>> userVars['yellow'] = int(15) >>> userVars['yellow'] 15 >>> userVars['yellow'] = int(10) >>> userVars['yellow'] 10

Permissions on /opt/RampPi/RampPi.CFG are rw-r--r--, and it's owned by the current user (myself). /usr/lib/cgi-bin/ (the location of the script) is owned by root but permissions are rwxr-xr-x. Not sure if that's a factor here but I figure it can't hurt. I would think that if it were a permissions error I would get a different message, but who knows!

I'd appreciate your help. Thanks!

[ichabod801]

You use 'yellow' as a key twice on that line. Are you sure the error is with userVars and not form?

[dbsoundman]

That could be something... I named the form variable "yellow" as well just because I will have multiple items on the form, and all they do is set the values of corresponding items in the dict, so I wanted to make life easy, so to speak.

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Wow, that was dumb...changing the form variable from yellow to yellowIn did it. Thanks!