Hi,

If you do “import pybel” you have to use the module name for the readstring 
command, ie. pybel.readstring(). Another option is to do “from pybel import 
readstring”, depending on your use case.

Kind regards,
Fredrik

On 5 mars 2017 20:25 +0100, phuongdnp <phuongdnp2...@yahoo.com>, wrote:
> I have tried installing different version of python (2.7, 3.3, 3.6) and
> openbabel (2.3, 2.4) (Win 32bit) following these steps:
> - Install python
> - Install pip
> - Install pybel module
> - Install openbabel GUI and also openbabel module
> - Add the Environment variables to python folders
> I can use "import pybel" and "import openbabel" but when I run the examples
> (mol = readstring("smi", "CCCC") or readfile()) there always is an error
> "name 'readstring' is not defined"
> I have also tried other windows pc but the same thing happened.
> Please help me to fix this. I appreciate very much.
>
>
>
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