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evandavey opened this issue Dec 30, 2017 · 3 comments
Closed

PythonEngine.Exec scope between classes #591

evandavey opened this issue Dec 30, 2017 · 3 comments

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@evandavey
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Environment

  • Pythonnet version: 2.3.0
  • Python version: 3.6
  • Operating System: Windows 10

Details

I am embedding Python using PythonEngine.Exec to run code read from a file which seems to be losing global scope.

string code;
using (var streamReader = new StreamReader(scriptFile, Encoding.UTF8)) {
   code = streamReader.ReadToEnd();
}
 
using (Py.GIL()) {
    PythonEngine.Exec(code)
}

The python code contains two classes:

class Test1():
   pass

class Test2():
   def __init__(self):
       Test1()

Test2()

Error:

NameError: name 'Test1' is not defined
yagweb added a commit to yagweb/pythonnet that referenced this issue Jan 10, 2018
@yagweb
fixed bug of Exec method pythonnet#591
ae82fb5
yagweb added a commit to yagweb/pythonnet that referenced this issue Jan 10, 2018
@yagweb
fixed bug of Exec method pythonnet#591
c6cc3da
@yagweb yagweb mentioned this issue Jan 10, 2018
Merged
4 tasks
@yagweb
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yagweb commented Jan 10, 2018

It's a bug of the Exec method. I just submit a PR to fix it.

Another method is using the PyScope class,

string code;
using (var streamReader = new StreamReader(scriptFile, Encoding.UTF8)) {
   code = streamReader.ReadToEnd();
}
 
using (Py.GIL()) {
    var scope = Py.CreateScope();
    scope.Exec(code);
    var t1 = (scope as dynamic).Test1();
    var t2 = scope.Get<dynamic>("Test2")();
}

@evandavey
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Thanks. I also had some success using PythonEngine.ModuleFromString(...).

den-run-ai added a commit that referenced this issue Jan 11, 2018
@den-run-ai
Merge pull request #594 from yagweb/bug_of_exec
9b62597 
fixed bug of Exec method #591
@den-run-ai
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@evandavey @yagweb thanks for this bug report and pull request!

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3 participants
@evandavey @den-run-ai @yagweb