导入lmfit成功，但未从lmfit导入模型

Question

I have installed lmfit trough PIP

pip install lmfit==0.7.2

importing lmfit in ipython notebook seems to work. That is, the import does not give any error messages and I can call a bunch of functions from lmfit.

However when i try to import Model from lmfit it gives me an import error:

from lmfit import Model 

The import error.

---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-151-3ba1b6658da4> in <module>()
----> 1 from lmfit import Model

ImportError: cannot import name Model

I assume this has to do with a failed installation but do not know how to diagnose this further and/or how to fix it. Does anyone have a suggestion?

Answer 1

I'm pretty sure the Model Class is new to lmfit-py release 0.8.1 so you may have to update lmfit.

(I have the offline documentation for 0.7.2 which does not include a section on the Model Class, but the documentation for version 0.8.1 has it)