Python 3 module to draw an ASCII bar graph with optional major and minor grid.
Some examples with a major grid every 100 and a minor grid every 20:
# 0 100 200 300
bar_graph( 98, 10, 31, 2, 5) # => '█▉█▉█▉█▉█▊ '
bar_graph( 99, 10, 31, 2, 5) # => '█▉█▉█▉█▉█▉ '
bar_graph(100, 10, 31, 2, 5) # => '█▉█▉█▉█▉██ '
bar_graph(101, 10, 31, 2, 5) # => '█▉█▉█▉█▉█▊▏ '
bar_graph(102, 10, 31, 2, 5) # => '█▉█▉█▉█▉█▊▎ '
bar_graph(104, 10, 31, 2, 5) # => '█▉█▉█▉█▉█▊▍ '
bar_graph(105, 10, 31, 2, 5) # => '█▉█▉█▉█▉█▊▌ '
bar_graph(106, 10, 31, 2, 5) # => '█▉█▉█▉█▉█▊▋ '
bar_graph(107, 10, 31, 2, 5) # => '█▉█▉█▉█▉█▊▊ '
bar_graph(109, 10, 31, 2, 5) # => '█▉█▉█▉█▉█▊▉ '
bar_graph(110, 10, 31, 2, 5) # => '█▉█▉█▉█▉█▊█ '
bar_graph(120, 10, 31, 2, 5) # => '█▉█▉█▉█▉█▊██ '
bar_graph(140, 10, 31, 2, 5) # => '█▉█▉█▉█▉█▊█▉██ '
bar_graph(160, 10, 31, 2, 5) # => '█▉█▉█▉█▉█▊█▉█▉██ '
bar_graph(200, 10, 31, 2, 5) # => '█▉█▉█▉█▉█▊█▉█▉█▉█▉██ '
bar_graph(300, 10, 31, 2, 5) # => '█▉█▉█▉█▉█▊█▉█▉█▉█▉█▊█▉█▉█▉█▉██ 'See also the examples for the unit tests of the function bar_graph in the
source file for indication of under- and overflow and more. There is also
orgtbl_ascii_draw, a Python reimplementation of the Emacs Lisp function
orgtbl-ascii-draw from Emacs Org mode.