Python NameError: Name 'get_tool_versions' not defined -

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i trying run cmd script calls setenv.py file. file has function says, 

    import build_cfg     tool_versions = get_tool_versions()     env_var_list = get_env_var()

which believe importing build_cfg module. build_cfg in turn has get_tool_versions , get_env_vars functions defined.

anyway, when run script error : 

file "setenv.py", line 172, in <module>    tool_versions = get_tool_versions () nameerror: name 'get_tool_versions' not defined

i relatively new python. please tell me doing wrong?

the error message says all: function get_tool_versions not exist in global namespace. solve problem have find out get_tool_versions defined , import there. if defined in build_cfg can this:

import build_cfg tool_versions = build_cfg.get_tool_versions() ...

or

from build_cfg import get_tool_versions tool_versions = get_tool_versions() ...

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