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Date: Tue, 21 Jan 2014 15:06:16 +0000
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Xref: csiph.com comp.lang.python:64416

On 2014-01-21 14:44, kevinbercaw@gmail.com wrote:
> I have a python script that accepts two arguments:
> sys.argv[1] is the full directory path to a config script.  The script is python but does not have a .py extension!
> sys.argv[2] is the file name of the config script
>
> For example:
> mainScript.py ./ a15800
>
>
> The config script sets variables that I want to be able to use in the main script.
>
> *** contents of "a15800": ***
> myVar = "hello"
>
> *** contents of "mainScript.py": ***
> def printVars(configModuleName):
>      myVarName = ("%s.myVar" % configModuleName)
>      print "myVarName = %s" % myVarName
>      myVarValue = eval(myVarName)
>      print "myVarValue = %s" % myVarValue
>
>
> if __name__ == '__main__':
>      import sys
>      import imp
>      filePath = sys.argv[1]
>      fileName = sys.argv[2]
>      configModuleObject = imp.load_source(fileName, filePath)
>      configModuleName = configModuleObject.__name__
>      print "configModuleName = %s" % configModuleName
>      printVars(configModuleName)
>
> *** Output: ***
>>mainScript.py ./ a15800
> configModuleName = a15800
> myVarName = a15800.myVar
> Traceback (most recent call last):
>    File "mainScript.py", line 27, in <module>
>      printVars(configModuleName)
>    File "mainScript.py", line 15, in printVars
>      myVarValue = eval(myVarName)
>    File "<string>", line 1, in <module>
> NameError: name 'a15800' is not defined
>
> *** Question: ***
> How do I get the value of the config file variable "myVar"??  It seems it's interpreting the variable name as a string rather than a variable name.  I don't see any python function stringToVariable.
>
The line:

     configModuleObject = imp.load_source(fileName, filePath)

imports the module and then binds it to the name configModuleObject,
therefore:

     print configModuleObject.myVar