Draw bar chart using the turtle module.

Bar_graph_turtle.py

#!/usr/bin/env python
#coding: utf-8

class DrawGraph():
    def set_data(self):
        # x軸目盛, y軸目盛, 棒グラフの数値をリストにして格納する。
        # 今回はサンプルなので適当にfor文で。
        for i in range(10):
            xList.append(str(i + 1))
        for i in range(5):
            yList.append(str((i + 1) * 20))
        for i in range(10):
            barList.append(str((i + 1) * 50))

    def setup(self):
        tG.hideturtle()
        tGl.hideturtle()
        tL.hideturtle()

        tX.up()
        tY.up()
        tG.up()
        tGl.up()
        tL.up()

        tX.setpos(-500, -250)
        tY.setpos(-500, -250)
        tG.setpos(-500, -250)
        tGl.setpos(-500, -250)

    def x_axis(self):
        tX.down()
        for i in range(10):
            tX.forward(100)
            tX.right(90)
            tX.forward(20)
            tX.up()
            tX.forward(XYmargin)
            tX.write(xList[i], False, align="center", font=(fontname, 10, "normal"))
            tX.right(180)
            tX.forward(20 + XYmargin)
            tX.down()
            tX.right(90)
        tX.forward(50)

    def y_axis(self):
        # 始めに0だけ書いておく
        tY.up()
        tY.setpos(-500 + zero_pos, -250 + zero_pos)
        tY.write("0", True, align="center", font=(fontname, 10, "normal"))
        tY.setpos(-500, -250)
        tY.down()

        tY.left(90)
        for i in range(5):
            tY.forward(100)
            tY.left(90)
            tY.forward(20)
            tY.up()
            tY.forward(XYmargin)
            tY.write(yList[i], False, align="center", font=(fontname, 10, "normal"))
            tY.left(180)
            tY.forward(20 + XYmargin)
            tY.down()
            tY.left(90)
        tY.forward(50)

    # 目盛線を点線で書くための関数
    def gridline(self):
        for i in range(5):
            tGl.setpos(-500, -250 + 100 * (i + 1))
            # 1回辺りの移動量(この場合は5+5で10)でグラフサイズを割る
            for j in range(1050 / 10):
                tGl.down()
                tGl.forward(5)
                tGl.up()
                tGl.forward(5)

    def draw_bar(self):
        tG.forward(100 - bar_width / 2)
        for i in range(10):
            tG.left(90)
            tG.down()
            tG.forward(int(barList[i]))
            tG.right(90)
            tG.forward(bar_width)
            tG.right(90)
            tG.forward(int(barList[i]))
            tG.left(90)
            tG.up()
            tG.forward(100 - bar_width)

    def label(self):
        tL.sety(-250 + 500 + 70)
        tL.write(title, False, align="center", font=(fontname, 25, "normal"))
        tL.sety(-250 - 20 - XYmargin - 30)
        tL.write(xlabel, False, align="center", font=(fontname, 12, "normal"))
        tL.setpos(-500, 250 + 60)
        tL.write(ylabel, False, align="center", font=(fontname, 12, "normal"))


if __name__=='__main__':
    import turtle
    turtle.setup(1200, 800)
    # グラフサイズは 1050x550

    tX   = turtle.Pen()
    tY   = turtle.Pen()
    tG   = turtle.Pen()
    tGl  = turtle.Pen()
    tL   = turtle.Pen()
        
    xList     = []
    yList     = []
    barList   = []
    zero_pos  = -10
    # 棒の幅
    bar_width = 40
    XYmargin  = 30
    fontname  = "Times New Roman"
    # グラフタイトル, ラベル名
    title     = "Figure01. Sample graph"
    xlabel    = "xLabel"
    ylabel    = "yLabel"
 
    graph = DrawGraph()
    graph.set_data()
    graph.setup()
    
    graph.label()
    graph.x_axis()
    graph.y_axis()
    graph.draw_bar()
    graph.gridline()

    turtle.mainloop()