$ pip install flake8-chart

$ flake8chart --help

Usage: flake8chart [OPTIONS]

Options:
  --chart-type [PIE|BAR]  type of chart (default: 'PIE')
  --chart-title TEXT      title of chart (default: 'flake8 stats')
  --chart-output TEXT     name of SVG file to export (default:
                          'flake8_stats.svg')
  --csv-output TEXT       name of CSV file to export
  --help                  Show this message and exit.

$ flake8 --statistics ~/devel/projs/fn.py | \
> flake8chart \
> --chart-type=PIE --chart-output=stats_pie.svg \
> --csv-output=stats.csv