Mikael Olofsson wrote:
> Peter Otten wrote:
>> To feed an arbitrary mapping object to execfile() you need to upgrade to
>> Python 2.4.
>
> Thanks! As clear as possible. I will do that.
>
> FYI: I think I managed to achieve what I want in Py2.3 using the
> compiler module:
>
> def getNamesFromAstNode(node,varSet):
> if node.__class__ in (compiler.ast.Global,compiler.ast.Import):
> varSet.union_update(node.names)
> if node.__class__ in (compiler.ast.Name,):
> varSet.add(node.name)
> for subNode in node.getChildNodes():
> getNamesFromAstNode(subNode,varSet)
>
> # Get all variable names that are referenced in the file:
> varSet = sets.Set()
> mainNode = compiler.parseFile(filePath)
> getNamesFromAstNode(mainNode,varSet)
>
> # Define a namespace and update it:
> ns = {}
> for varName in varSet:
> ns[varName] = dummyObject
>
> # Execute the file without NameErrors:
> execfile(filePath,ns)
>
> Batteries included!
Clearly more elegant than:
>>> print open(filename).read()
b = a
>>> dummy = 42
>>> names = []
>>> while 1:
... ns = dict((n, dummy) for n in names)
... try:
... execfile(filename, ns)
... except NameError, e:
... names.append(e[0][6:-16])
... else:
... break
...
>>> names
['a']
:-)
Peter
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