Hello,
sounds like a Problem with your matplotlib installation (matplotlib does
not come with sumo but must have been installed by you at some point).
maybe this helps:
https://stackoverflow.com/questions/13292396/error-importing-matplotlib-pyplot
regards,
Jakob

2017-11-08 9:48 GMT+01:00 michel.souweine--- via sumo-user <
[email protected]>:

> Hello,
> I tried unsuccessfully to run some of the Visualization/tools of SUMO, let
> us say, for instance <SUMO home>/tools/visualization/plot_net_dump.py>
> These programs call the python tool 
> "Python27\Lib\site-packages\matplotlib\cbook\__init__.py"
> which in there turn call
> "matplotlib.cbook. is_string_like"
> I get the message "from matplotlib.cbook cannot import is_string_like"
> As a matter of fact, looking in matplotlib documentation, this instruction
> "is_string_like" does appears as depreciated
> Nevertheless I didn't find something wrong with my Sumo installation
> (2017) and its matplotlib inside
> Please, would it be possible to have an hint ?
> I thank you very much for help on these more than usefull visualization
> tools
> Michel Souweine
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