cannot import name 'qualitative' from 'plotly.express.colors'

Hi! I am new to Dash and just installed plotly 4.0.0, where plotly.express is integrated. But I have some problem importing it.

When trying to run the example code:

import plotly.express as px
print(px.data.iris.__doc__)
px.data.iris().head()

I got this error:

---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-5-1979e3394739> in <module>
----> 1 import plotly.express as px
      2 print(px.data.iris.__doc__)
      3 px.data.iris().head()

~/anaconda3/lib/python3.7/site-packages/plotly/express/__init__.py in <module>
      6 __version__ = "0.3.0"
      7 
----> 8 from ._chart_types import (  # noqa: F401
      9     scatter,
     10     scatter_3d,

~/anaconda3/lib/python3.7/site-packages/plotly/express/_chart_types.py in <module>
----> 1 from ._core import make_figure
      2 from ._doc import make_docstring
      3 import plotly.graph_objs as go
      4 
      5 

~/anaconda3/lib/python3.7/site-packages/plotly/express/_core.py in <module>
      4 
      5 from _plotly_utils.basevalidators import ColorscaleValidator
----> 6 from .colors import qualitative, sequential
      7 import math
      8 import pandas

ImportError: cannot import name 'qualitative' from 'plotly.express.colors'

Is there anything I can do to solve it?

[jonmmease]

Hi @AmazingSean, this error suggests that there may be something corrupt in the environment. This was also reported in https://github.com/plotly/plotly_express/issues/123 and the problem went away after restarting the system.

First, make sure that you don’t have plotly installed with both pip and conda. Try uninstalling and reinstalling like this.

$ pip uninstall plotly
$ conda uninstall plotly
$ conda install -c plotly plotly

If that doesn’t help, could you try installing plotly in a fresh conda environment?

$ conda create -n plotly_install -c plotly python=3.7 plotly=4.0
$ conda activate plotly_install

[chefcramer]

Uninstalling and then reinstalling plotly worked for me too!