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Lambda doesn't see changes of global variables #3

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splitline opened this issue Jul 15, 2021 · 0 comments

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splitline commented Jul 15, 2021 •

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The globals for lambda is just a clone/snapshot of current context.

Pickora/compiler.py

Lines 355 to 358 in 7e0e8eb

    
           func_globals = ast.Dict(keys=[], values=[]) 
        
           for name in code_args[8]:  # co_names 
        
               func_globals.keys.append(ast.Constant(value=name)) 
        
               func_globals.values.append(ast.Name(id=name))

So if any global variables are changed after the lambda definition, the lambda won't see those changes
For example:

val = 'before'
f = lambda:val
val = 'after'
print(f())  # before

I am not sure if there are any way to fix this 🤔

splitline added the bug label

splitline self-assigned this

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