python 3.x - Pygal Module Not Working -

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in trying run simple code has outputs histogram, keep getting following error:

traceback (most recent call last):   file "c:\tmp\die_visual.py", line 1, in <module>     import pygal   file "c:\users\christopher\appdata\roaming\python\python36\site-packages\pygal\__init__.py", line 33, in <module>     pygal.graph.bar import bar   file "c:\users\christopher\appdata\roaming\python\python36\site-packages\pygal\graph\__init__.py", line 24, in <module>     .__about__ import *  # noqa: f401,f403 modulenotfounderror: no module named 'pygal.graph.__about__'

i have moved file requires pygal same directory , same error.

this code have entered.

import pygal die import die # create d6. die = die()  # make rolls, , store results in list.  results = [] roll_num in range(1000):     result = die.roll()     results.append(result)   # analyze results frequencies = [] value in range(1, die.num_sides+1):     frequency = results.count(value)     frequencies.append(frequency)  # visualize results. hist = pygal.bar() hist.title = "results of rolling 1 d6 1000 times." hist.x_labels = ['1', '2', '3', '4', '5', '6'] hist.x_title = "result" hist.y_title = "frequency of result" hist.add('d6', frequencies) hist.render_to_file('die_visual.svg')





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