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GeezerVison is showing github.com — Multiple class definitions in the same file raise error "invalid syntax" · Issue #257 · go-python/gpython

Multiple class definitions in the same file raise error "invalid syntax" #257

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#258
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Multiple class definitions in the same file raise error "invalid syntax"#257
#258
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@SolarLune
SolarLune
opened on Jul 2, 2026
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Hey, there. It seems like it's not possible to define multiple classes in a single Python file with py.RunSrc(), unless I'm misunderstanding something...? It works with py.RunFile(), though.

Go:

context := py.NewContext(py.DefaultContextOpts())

data, _ := fs.ReadFile(g.FS, "math_stuff.py")

_, err := py.RunSrc(context, string(data), "run", nil)

log.Println(err)

math_stuff.py

class A:
    pass


class B:
    pass

Gives me the error:

2026/07/02 15:06:16
  File "run", line 5, offset 5
    class B:


SyntaxError: 'invalid syntax'

I'm testing with the latest commit.

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  1. ncw commented on Jul 3, 2026

    @ncw
    ncw
    on Jul 3, 2026
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    I made an attempt at a fix for this on the fix-257-RunSrc branch - can you test it out?

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