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https://issues.apache.org/jira/browse/THRIFT-4281?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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jonathan updated THRIFT-4281:
-----------------------------
       Flags: Important
    Priority: Critical  (was: Major)

> Got a NameError when using class defined in ttypes.py
> -----------------------------------------------------
>
>                 Key: THRIFT-4281
>                 URL: https://issues.apache.org/jira/browse/THRIFT-4281
>             Project: Thrift
>          Issue Type: Bug
>          Components: Python - Compiler
>    Affects Versions: 0.9.2
>         Environment: Thrift version 0.9.2
>            Reporter: jonathan
>            Priority: Critical
>
> Here the problem happens.
> See the error first:
>     from ttypes import *
>   File "../gen-py-ofs/ofs/ttypes.py", line 200, in <module>
>     class FeatureGetParams:
>   File "../gen-py-ofs/ofs/ttypes.py", line 210, in FeatureGetParams
>     (2, TType.LIST, 'featureScenes', (TType.STRUCT,(FeatureScene, 
> FeatureScene.thrift_spec)), None, ), # 2
> NameError: name 'FeatureScene' is not defined
> Class FeatureScene is defined in line 391 of ttype.py, and is used by another 
> class GetParams in line of 200. Then I got this error.
> I have a test.
> *If I moved class FeatureScene to the front of class GetParams, the error was 
> gone.*
> I googled character of language Python, it did happen in this situation that 
> we must define it at the place before we refer to it.
> So I have a question, if it's true, *{color:red}why doesn't ttypes.py 
> generate two classes in the correct order?{color}*
> It confused me for a while. Hope get your reply, thank you.
> Paste details of two classes for you reference:
> Defined in line 391:
> class FeatureScene:
>   """
>   Attributes:
>    - featureSceneType
>    - featureKeys
>   """
>   thrift_spec = (
>     None, # 0
>     (1, TType.I32, 'featureSceneType', None, None, ), # 1
>     (2, TType.LIST, 'featureKeys', (TType.STRING,None), None, ), # 2
>   )
> Defined in line 200:
> class GetParams:
>   """
>   Attributes:
>    - orderId
>    - featureScenes
>   """
>   thrift_spec = (
>     None, # 0
>     (1, TType.I64, 'orderId', None, None, ), # 1
>     (2, TType.LIST, 'featureScenes', (TType.STRUCT,(FeatureScene, 
> FeatureScene.thrift_spec)), None, ), # 2
>   )



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