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 += flow.Start(w=2, h=1.5).label('START')
d += flow.Arrow().down().length(d.unit/3)
d += (h := flow.Decision(w=5.5, h=4, S='YES')
      .label('Hey, wait,\nthis flowchart\nis a trap!'))
d += flow.Line().down().length(d.unit/4)
d += flow.Line().right().length(d.unit*1.1)
d += flow.Line().up().toy(h.E)
d += 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)
d += (b := flow.Start(w=2, h=1.5).label('START'))
d += flow.Arrow().down().length(d.unit/2)
d += (d1 := flow.Decision(w=5, h=3.9, E='YES', S='NO')
      .label('DO YOU\nUNDERSTAND\nFLOW CHARTS?'))
d += flow.Arrow().length(d.unit/2)
d += (d2 := flow.Decision(w=5, h=3.9, E='YES', S='NO')
      .label('OKAY,\nYOU SEE THE\nLINE LABELED\n"YES"?'))
d += flow.Arrow().length(d.unit/2)
d += (d3 := flow.Decision(w=5.2, h=3.9, E='YES', S='NO')
      .label('BUT YOU\nSEE THE ONES\nLABELED "NO".'))

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

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

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

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