Flowcharting¶

Flowchart elements are defined in the flow module.

from schemdraw import flow

It’s a Trap!¶

Recreation of XKCD 1195.

../_images/flowcharting_1_0.svg

d = schemdraw.Drawing()
d.add(flow.Start(w=2, h=1.5, label='START'))
d.add(flow.Arrow('down', l=d.unit/3))
h = d.add(flow.Decision(w=5.5, h=4, S='YES', label='Hey, wait,\nthis flowchart\nis a trap!'))
d.add(flow.Line('down', l=d.unit/4))
d.add(flow.Line('right', l=d.unit*1.1))
d.add(flow.Line('up', toy=h.E))
d.add(flow.Arrow('left', tox=h.E))
d.draw()

Flowchart for flowcharts¶

Recreation of XKCD 518.

../_images/flowcharting_2_0.svg

d = schemdraw.Drawing(fontsize=11)
b = d.add(flow.Start(w=2, h=1.5, label='START'))
d.add(flow.Arrow('down', l=d.unit/2))
d1 = d.add(flow.Decision(w=5, h=3.9, E='YES', S='NO', label='DO YOU\nUNDERSTAND\nFLOW CHARTS?'))
d.add(flow.Arrow(l=d.unit/2))
d2 = d.add(flow.Decision(w=5, h=3.9, E='YES', S='NO', label='OKAY,\nYOU SEE THE\nLINE LABELED\n"YES"?'))
d.add(flow.Arrow(l=d.unit/2))
d3 = d.add(flow.Decision(w=5.2, h=3.9, E='YES', S='NO', label='BUT YOU\nSEE THE ONES\nLABELED "NO".'))

d.add(flow.Arrow('right', xy=d3.E, l=d.unit/2))
d.add(flow.Box(w=2, h=1.25, label='WAIT,\nWHAT?', anchor='W'))
d.add(flow.Arrow('down', xy=d3.S, l=d.unit/2))
listen = d.add(flow.Box(w=2, h=1, label='LISTEN.'))
d.add(flow.Arrow('right', xy=listen.E, l=d.unit/2))
hate = d.add(flow.Box(w=2, h=1.25, label='I HATE\nYOU.', anchor='W'))

d.add(flow.Arrow('right', xy=d1.E, l=d.unit*3.5))
good = d.add(flow.Box(w=2, h=1, label='GOOD', anchor='W'))
d.add(flow.Arrow('right', xy=d2.E, l=d.unit*1.5))
d4 = d.add(flow.Decision(w=5.3, h=4.0, E='YES', S='NO', label='...AND YOU CAN\nSEE THE ONES\nLABELED "NO"?', anchor='W'))

d.add(flow.Line('right', xy=d4.E, tox=good.S))
d.add(flow.Arrow('up', toy=good.S))
d.add(flow.Arrow('down', xy=d4.S, l=d.unit/2))
d5 = d.add(flow.Decision(w=5, h=3.6, E='YES', S='NO', label='BUT YOU\nJUST FOLLOWED\nTHEM TWICE!'))
d.add(flow.Arrow('right', xy=d5.E, l=d.unit))
question = d.add(flow.Box(w=3.5, h=1.75, label="(THAT WASN'T\nA QUESTION.)", anchor='W'))
d.add(flow.Line('down', xy=d5.S, l=d.unit/3))
d.add(flow.Line('right', tox=question.S))
d.add(flow.Arrow('up', toy=question.S))

d.add(flow.Line('right', xy=good.E, tox=question.S))
d.add(flow.Arrow('down', l=d.unit))
drink = d.add(flow.Box(w=2.5, h=1.5, label="LET'S GO\nDRINK."))
d.add(flow.Arrow('right', xy=drink.E, label='6 DRINKS'))
d.add(flow.Box(w=3.7, h=2, label='HEY, I SHOULD\nTRY INSTALLING\nFREEBSD!', anchor='W'))
d.add(flow.Arrow('up', xy=question.N, l=d.unit*.75))
screw = d.add(flow.Box(w=2.5, h=1, label='SCREW IT.', anchor='S'))
d.add(flow.Arrow('up', xy=screw.N, toy=drink.S))
d.draw()