[Pyparsing] Question/help with pyparsing

[Vineet J. \(gmail\) <vin...@gm...>]

Problem:

 

I allow the users of my application to write small rules as python code. I
use pylint to find errors in code they enter. As part of the user code they
are required to enter a list (lista) and a couple of dicts (dict1, dict2) at
the module level. 

 

I use lista, dict1, dict2 to add variables to the module dynamically at run
time. The problem I'm having is that pylint complains of the dynamic
variables that are set in lista and dict1 and dict2. So I was thinking of
having a multiple stage effort to find syntax errors with the user python
code. 

 

Step 1:

 

Extract the lista, dict1, and dict2 with some pyparsing code. 

 

Step 2:

 

Then convert  list1, dict1, dict2 to valid python objects using pyparsing
json conversion function

 

Step 3:

 

Run pylint on the python user code. Ignore errors for variables and
functions defined in lista, dict1, dict2

 

 

Example User Python Code:

 

Lista  = ["variable1", "variable2"]

 

RuleDict = {

'rule1':{'name1':'function1name', },

'rule1':{'name1':'function1name', }

}

 

def user_logic():

                print variable1 #Not error

                print variable2 #Not error

                print function1name #Not error

                print function1name #Not error

                asdfasjkdfsdkajflasj; #ERROR

 

asfasdfasdf #ERROR

 

How would I do step1 and step2 with pyparsing? I'm going to sign up for the
oreily book and do some more reading on pyparsing this weekend, but any work
that I can get from anyone on this list would be very helpful.

 

Thanks,

 

Vineet