ValueError: could not convert string to float: '2015-12-24'

[JohnTaco93]

Hi, nice work and thanks for sharing it.
I would like to ask one question. When I try to run the notebook 'visualization.ipynb' I got an error
in this part of the code:

    1 TOOL = 3 # The tool that we are plotting
    2 
    3 td = ToolData(TOOL)   # the error ocurrs in this line
    4 air_cuts = [cut for cut in td.iter_cuts() if cut.cuttype==AIR_CUT]
    5 conv_cuts = [cut for cut in td.iter_cuts() if cut.cuttype==CONV_CUT]

Error:
ValueError: could not convert string to float: '2015-12-24'

Is there any way to fix this?

Thanks and Regards,
John Taco