Re: run a string as code?


py_genetic wrote:
mtbeedee@xxxxxxxxx wrote:
py_genetic wrote:
How can you make python interpret a string (of py code) as code. For
example if you want a py program to modify itself as it runs. I know
this is an advantage of interpreted languages, how is this done in
python. Thanks.

This might do it...

print eval.__doc__
eval(source[, globals[, locals]]) -> value

Evaluate the source in the context of globals and locals.
The source may be a string representing a Python expression
or a code object as returned by compile().
The globals must be a dictionary and locals can be any mappping,
defaulting to the current globals and locals.
If only globals is given, locals defaults to it.

For example each time this line is interpreted I would like to use the
new value of the state var which is a global var. How can I force
state to be identified and used in this string.

r_table = h5file.root.state_raw_records.neg_records

r_table = eval("h5file.root.state_raw_records.neg_records") ??
r_table = h5file.root.eval("state")_raw_records.neg_records ?? eval is
not a part of root

dont think either of these is very logical? Any ideas? Possibly the
parser mod?

Got it!

tmp = "h5file.root."+state+"_raw_records.pos_records"
r_table = eval(tmp)

works great thanks for the help!

.

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