Question

我有这个巨大的功能，我想知道如何使它递归。我有一个永远不会成真的基本情况，所以应该总是去其他地方并继续用变量t增加来调用自己。任何帮助都会很棒感谢

 def draw(x, y, t, planets):
    if 'Satellites' in planets["Moon"]:
        print ("fillcircle", x, y, planets["Moon"]['Radius']*scale)
    else:
            print("refresh")
            print("colour 0 0 0")
            print("clear")
            print("colour 255 255 255")
            print("fillcircle",x,y,planets['Sun']['Radius']*scale)
            print("text ", "\"Sun\"",x+planets['Sun']['Radius']*scale,y)
            if "Mercury" in planets:
                r_Mercury=planets['Mercury']['Orbital Radius']*scale;
                print("circle",x,y,r_Mercury)
                r_Xmer=x+math.sin(t*2*math.pi/planets['Mercury']['Period'])*r_Mercury
                r_Ymer=y+math.cos(t*2*math.pi/planets['Mercury']['Period'])*r_Mercury
                print("fillcircle",r_Xmer,r_Ymer,3)
                print("text ", "\"Mercury\"",r_Xmer+planets['Mercury']['Radius']*scale,r_Ymer)
            if "Venus" in planets:
                r_Venus=planets['Venus']['Orbital Radius']*scale;
                print("circle",x,y,r_Venus)
                r_Xven=x+math.sin(t*2*math.pi/planets['Venus']['Period'])*r_Venus
                r_Yven=y+math.cos(t*2*math.pi/planets['Venus']['Period'])*r_Venus
                print("fillcircle",r_Xven,r_Yven,3)
                print("text ", "\"Venus\"",r_Xven+planets['Venus']['Radius']*scale,r_Yven)
            if "Earth" in planets:
                r_Earth=planets['Earth']['Orbital Radius']*scale;
                print("circle",x,y,r_Earth)
                r_Xe=x+math.sin(t*2*math.pi/planets['Earth']['Period'])*r_Earth
                r_Ye=y+math.cos(t*2*math.pi/planets['Earth']['Period'])*r_Earth
                print("fillcircle",r_Xe,r_Ye,3)
                print("text ", "\"Earth\"",r_Xe+planets['Earth']['Radius']*scale,r_Ye)
            if "Moon" in planets:
                r_Moon=planets['Moon']['Orbital Radius']*scale;
                print("circle",r_Xe,r_Ye,r_Moon)
                r_Xm=r_Xe+math.sin(t*2*math.pi/planets['Moon']['Period'])*r_Moon
                r_Ym=r_Ye+math.cos(t*2*math.pi/planets['Moon']['Period'])*r_Moon
                print("fillcircle",r_Xm,r_Ym,3)
                print("text ", "\"Moon\"",r_Xm+planets['Moon']['Radius']*scale,r_Ym)
            if "Mars" in planets:
                r_Mars=planets['Mars']['Orbital Radius']*scale;
                print("circle",x,y,r_Mars)
                r_Xmar=x+math.sin(t*2*math.pi/planets['Mars']['Period'])*r_Mars
                r_Ymar=y+math.cos(t*2*math.pi/planets['Mars']['Period'])*r_Mars
                print("fillcircle",r_Xmar,r_Ymar,3)
                print("text ", "\"Mars\"",r_Xmar+planets['Mars']['Radius']*scale,r_Ymar)
            if "Phobos" in planets:
                r_Phobos=planets['Phobos']['Orbital Radius']*scale;
                print("circle",r_Xmar,r_Ymar,r_Phobos)
                r_Xpho=r_Xmar+math.sin(t*2*math.pi/planets['Phobos']['Period'])*r_Phobos
                r_Ypho=r_Ymar+math.cos(t*2*math.pi/planets['Phobos']['Period'])*r_Phobos
                print("fillcircle",r_Xpho,r_Ypho,3)
                print("text ", "\"Phobos\"",r_Xpho+planets['Phobos']['Radius']*scale,r_Ypho)
            if "Deimos" in planets:
                r_Deimos=planets['Deimos']['Orbital Radius']*scale;
                print("circle",r_Xmar,r_Ymar,r_Deimos)
                r_Xdei=r_Xmar+math.sin(t*2*math.pi/planets['Deimos']['Period'])*r_Deimos
                r_Ydei=r_Ymar+math.cos(t*2*math.pi/planets['Deimos']['Period'])*r_Deimos
                print("fillcircle",r_Xdei,r_Ydei,3)
                print("text ", "\"Deimos\"",r_Xpho+planets['Deimos']['Radius']*scale,r_Ydei)
            if "Ceres" in planets:
                r_Ceres=planets['Ceres']['Orbital Radius']*scale;
                print("circle",x,y,r_Ceres)
                r_Xcer=x+math.sin(t*2*math.pi/planets['Ceres']['Period'])*r_Ceres
                r_Ycer=y+math.cos(t*2*math.pi/planets['Ceres']['Period'])*r_Ceres
                print("fillcircle",r_Xcer,r_Ycer,3)
                print("text ", "\"Ceres\"",r_Xcer+planets['Ceres']['Radius']*scale,r_Ycer)
            if "Jupiter" in planets:
                r_Jupiter=planets['Jupiter']['Orbital Radius']*scale;
                print("circle",x,y,r_Jupiter)
                r_Xjup=x+math.sin(t*2*math.pi/planets['Jupiter']['Period'])*r_Jupiter
                r_Yjup=y+math.cos(t*2*math.pi/planets['Jupiter']['Period'])*r_Jupiter
                print("fillcircle",r_Xjup,r_Yjup,3)
                print("text ", "\"Jupiter\"",r_Xjup+planets['Jupiter']['Radius']*scale,r_Yjup)
            if "Io" in planets:
                r_Io=planets['Io']['Orbital Radius']*scale;
                print("circle",r_Xjup,r_Yjup,r_Io)
                r_Xio=r_Xjup+math.sin(t*2*math.pi/planets['Io']['Period'])*r_Io
                r_Yio=r_Yjup+math.cos(t*2*math.pi/planets['Io']['Period'])*r_Io
                print("fillcircle",r_Xio,r_Yio,3)
                print("text ", "\"Io\"",r_Xio+planets['Io']['Radius']*scale,r_Yio)
            if "Europa" in planets:
                r_Europa=planets['Europa']['Orbital Radius']*scale;
                print("circle",r_Xjup,r_Yjup,r_Europa)
                r_Xeur=r_Xjup+math.sin(t*2*math.pi/planets['Europa']['Period'])*r_Europa
                r_Yeur=r_Yjup+math.cos(t*2*math.pi/planets['Europa']['Period'])*r_Europa
                print("fillcircle",r_Xeur,r_Yeur,3)
                print("text ", "\"Europa\"",r_Xeur+planets['Europa']['Radius']*scale,r_Yeur)
            if "Ganymede" in planets:
                r_Ganymede=planets['Ganymede']['Orbital Radius']*scale;
                print("circle",r_Xjup,r_Yjup,r_Ganymede)
                r_Xgan=r_Xjup+math.sin(t*2*math.pi/planets['Ganymede']['Period'])*r_Ganymede
                r_Ygan=r_Yjup+math.cos(t*2*math.pi/planets['Ganymede']['Period'])*r_Ganymede
                print("fillcircle",r_Xgan,r_Ygan,3)
                print("text ", "\"Ganymede\"",r_Xgan+planets['Ganymede']['Radius']*scale,r_Ygan)
            if "Callisto" in planets:
                r_Callisto=planets['Callisto']['Orbital Radius']*scale;
                print("circle",r_Xjup,r_Yjup,r_Callisto)
                r_Xcal=r_Xjup+math.sin(t*2*math.pi/planets['Callisto']['Period'])*r_Callisto
                r_Ycal=r_Yjup+math.cos(t*2*math.pi/planets['Callisto']['Period'])*r_Callisto
                print("fillcircle",r_Xcal,r_Ycal,3)
                print("text ", "\"Callisto\"",r_Xcal+planets['Callisto']['Radius']*scale,r_Ycal)
            if "Saturn" in planets:
                r_Saturn=planets['Saturn']['Orbital Radius']*scale;
                print("circle",x,y,r_Saturn)
                r_Xsat=x+math.sin(t*2*math.pi/planets['Saturn']['Period'])*r_Saturn
                r_Ysat=y+math.cos(t*2*math.pi/planets['Saturn']['Period'])*r_Saturn
                print("fillcircle",r_Xsat,r_Ysat,3)
                print("text ", "\"Saturn\"",r_Xsat+planets['Saturn']['Radius']*scale,r_Ysat)
            if "Mimas" in planets:
                r_Mimas=planets['Mimas']['Orbital Radius']*scale;
                print("circle",r_Xsat,r_Ysat,r_Mimas)
                r_Xmim=r_Xsat+math.sin(t*2*math.pi/planets['Mimas']['Period'])*r_Mimas
                r_Ymim=r_Ysat+math.cos(t*2*math.pi/planets['Mimas']['Period'])*r_Mimas
                print("fillcircle",r_Xmim,r_Ymim,3)
                print("text ", "\"Mimas\"",r_Xmim+planets['Mimas']['Radius']*scale,r_Ymim)
            if "Enceladus" in planets:
                r_Enceladus=planets['Enceladus']['Orbital Radius']*scale;
                print("circle",r_Xsat,r_Ysat,r_Enceladus)
                r_Xenc=r_Xsat+math.sin(t*2*math.pi/planets['Enceladus']['Period'])*r_Enceladus
                r_Yenc=r_Ysat+math.cos(t*2*math.pi/planets['Enceladus']['Period'])*r_Enceladus
                print("fillcircle",r_Xenc,r_Yenc,3)
                print("text ", "\"Enceladus\"",r_Xenc+planets['Enceladus']['Radius']*scale,r_Yenc)
            if "Tethys" in planets:
                r_Tethys=planets['Tethys']['Orbital Radius']*scale;
                print("circle",r_Xsat,r_Ysat,r_Tethys)
                r_Xtet=r_Xsat+math.sin(t*2*math.pi/planets['Tethys']['Period'])*r_Tethys
                r_Ytet=r_Ysat+math.cos(t*2*math.pi/planets['Tethys']['Period'])*r_Tethys
                print("fillcircle",r_Xtet,r_Ytet,3)
                print("text ", "\"Tethys\"",r_Xtet+planets['Tethys']['Radius']*scale,r_Ytet)
            if "Dione" in planets:
                r_Dione=planets['Dione']['Orbital Radius']*scale;
                print("circle",r_Xsat,r_Ysat,r_Dione)
                r_Xdio=r_Xsat+math.sin(t*2*math.pi/planets['Dione']['Period'])*r_Dione
                r_Ydio=r_Ysat+math.cos(t*2*math.pi/planets['Dione']['Period'])*r_Dione
                print("fillcircle",r_Xdio,r_Ydio,3)
                print("text ", "\"Dione\"",r_Xdio+planets['Dione']['Radius']*scale,r_Ydio)
            if "Rhea" in planets:
                r_Rhea=planets['Rhea']['Orbital Radius']*scale;
                print("circle",r_Xsat,r_Ysat,r_Rhea)
                r_Xrhe=r_Xsat+math.sin(t*2*math.pi/planets['Rhea']['Period'])*r_Rhea
                r_Yrhe=r_Ysat+math.cos(t*2*math.pi/planets['Rhea']['Period'])*r_Rhea
                print("fillcircle",r_Xrhe,r_Yrhe,3)
                print("text ", "\"Rhea\"",r_Xrhe+planets['Rhea']['Radius']*scale,r_Yrhe)
            if "Titan" in planets:
                r_Titan=planets['Titan']['Orbital Radius']*scale;
                print("circle",r_Xsat,r_Ysat,r_Titan)
                r_Xtit=r_Xsat+math.sin(t*2*math.pi/planets['Titan']['Period'])*r_Titan
                r_Ytit=r_Ysat+math.cos(t*2*math.pi/planets['Titan']['Period'])*r_Titan
                print("fillcircle",r_Xtit,r_Ytit,3)
                print("text ", "\"Titan\"",r_Xtit+planets['Titan']['Radius']*scale,r_Ytit)
            if "Iapetus" in planets:
                r_Iapetus=planets['Iapetus']['Orbital Radius']*scale;
                print("circle",r_Xsat,r_Ysat,r_Iapetus)
                r_Xiap=r_Xsat+math.sin(t*2*math.pi/planets['Iapetus']['Period'])*r_Iapetus
                r_Yiap=r_Ysat+math.cos(t*2*math.pi/planets['Iapetus']['Period'])*r_Iapetus
                print("fillcircle",r_Xiap,r_Yiap,3)
                print("text ", "\"Iapetus\"",r_Xiap+planets['Iapetus']['Radius']*scale,r_Yiap)
            if "Uranus" in planets:
                r_Uranus=planets['Uranus']['Orbital Radius']*scale;
                print("circle",x,y,r_Uranus)
                r_Xura=x+math.sin(t*2*math.pi/planets['Uranus']['Period'])*r_Uranus
                r_Yura=y+math.cos(t*2*math.pi/planets['Uranus']['Period'])*r_Uranus
                print("fillcircle",r_Xura,r_Yura,3)
                print("text ", "\"Uranus\"",r_Xura+planets['Uranus']['Radius']*scale,r_Yura)
            if "Puck" in planets:
                r_Puck=planets['Puck']['Orbital Radius']*scale;
                print("circle",r_Xura,r_Yura,r_Puck)
                r_Xpuc=r_Xura+math.sin(t*2*math.pi/planets['Puck']['Period'])*r_Puck
                r_Ypuc=r_Yura+math.cos(t*2*math.pi/planets['Puck']['Period'])*r_Puck
                print("fillcircle",r_Xpuc,r_Ypuc,3)
                print("text ", "\"Puck\"",r_Xpuc+planets['Puck']['Radius']*scale,r_Ypuc)
            if "Miranda" in planets:
                r_Miranda=planets['Miranda']['Orbital Radius']*scale;
                print("circle",r_Xura,r_Yura,r_Miranda)
                r_Xmira=r_Xura+math.sin(t*2*math.pi/planets['Miranda']['Period'])*r_Miranda
                r_Ymira=r_Yura+math.cos(t*2*math.pi/planets['Miranda']['Period'])*r_Miranda
                print("fillcircle",r_Xmira,r_Ymira,3)
                print("text ", "\"Miranda\"",r_Xmira+planets['Miranda']['Radius']*scale,r_Ymira)
            if "Ariel" in planets:
                r_Ariel=planets['Ariel']['Orbital Radius']*scale;
                print("circle",r_Xura,r_Yura,r_Ariel)
                r_Xari=r_Xura+math.sin(t*2*math.pi/planets['Ariel']['Period'])*r_Ariel
                r_Yari=r_Yura+math.cos(t*2*math.pi/planets['Ariel']['Period'])*r_Ariel
                print("fillcircle",r_Xari,r_Yari,3)
                print("text ", "\"Ariel\"",r_Xari+planets['Ariel']['Radius']*scale,r_Yari)
            if "Umbriel" in planets:
                r_Umbriel=planets['Umbriel']['Orbital Radius']*scale;
                print("circle",r_Xura,r_Yura,r_Umbriel)
                r_Xumb=r_Xura+math.sin(t*2*math.pi/planets['Umbriel']['Period'])*r_Umbriel
                r_Yumb=r_Yura+math.cos(t*2*math.pi/planets['Umbriel']['Period'])*r_Umbriel
                print("fillcircle",r_Xumb,r_Yumb,3)
                print("text ", "\"Umbriel\"",r_Xumb+planets['Umbriel']['Radius']*scale,r_Yumb)
            if "Titania" in planets:
                r_Titania=planets['Titania']['Orbital Radius']*scale;
                print("circle",r_Xura,r_Yura,r_Titania)
                r_Xtita=r_Xura+math.sin(t*2*math.pi/planets['Titania']['Period'])*r_Titania
                r_Ytita=r_Yura+math.cos(t*2*math.pi/planets['Titania']['Period'])*r_Titania
                print("fillcircle",r_Xtita,r_Ytita,3)
                print("text ", "\"Titania\"",r_Xtita+planets['Titania']['Radius']*scale,r_Ytita)
            if "Oberon" in planets:
                r_Oberon=planets['Oberon']['Orbital Radius']*scale;
                print("circle",r_Xura,r_Yura,r_Oberon)
                r_Xober=r_Xura+math.sin(t*2*math.pi/planets['Oberon']['Period'])*r_Oberon
                r_Yober=r_Yura+math.cos(t*2*math.pi/planets['Oberon']['Period'])*r_Oberon
                print("fillcircle",r_Xober,r_Yober,3)
                print("text ", "\"Oberon\"",r_Xober+planets['Oberon']['Radius']*scale,r_Yober)
            if "Neptune" in planets:
                r_Neptune=planets['Neptune']['Orbital Radius']*scale;
                print("circle",x,y,r_Neptune)
                r_Xnep=x+math.sin(t*2*math.pi/planets['Neptune']['Period'])*r_Neptune
                r_Ynep=y+math.cos(t*2*math.pi/planets['Neptune']['Period'])*r_Neptune
                print("fillcircle",r_Xnep,r_Ynep,3)
                print("text ", "\"Neptune\"",r_Xnep+planets['Neptune']['Radius']*scale,r_Ynep)
            if "Titan" in planets:
                r_Titan=planets['Titan']['Orbital Radius']*scale;
                print("circle",r_Xnep,r_Ynep,r_Titan)
                r_Xtita=r_Xnep+math.sin(t*2*math.pi/planets['Titan']['Period'])*r_Titan
                r_Ytita=r_Ynep+math.cos(t*2*math.pi/planets['Titan']['Period'])*r_Titan
                print("fillcircle",r_Xtita,r_Ytita,3)
                print("text ", "\"Titan\"",r_Xtita+planets['Titan']['Radius']*scale,r_Ytita)

            t += 0.003
            draw(x, y, t, planets)
def draw(x, y, t, planets):
    if 'Satellites' in planets["Moon"]:
        print ("fillcircle", x, y, planets["Moon"]['Radius']*scale)
    else:
        print("refresh")
        print("colour 0 0 0")
        print("clear")
        print("colour 255 255 255")
        print("fillcircle",x,y,planets['Sun']['Radius']*scale)
        print("text ", "\"Sun\"",x+planets['Sun']['Radius']*scale,y)

        for each in planets.keys():
                r_planet=planets[each]['Orbital Radius']*scale;
                print("circle", x, y, r_planet)
                #if "Period" in planets[each]:
                    #r_X = x+math.sin(t*2*math.pi/planets[each]['Period'])*r_planet
                    #r_Y = y+math.cos(t*2*math.pi/planets[each]['Period'])*r_planet
                    #print("fillcircle",r_X,r_Y,3)
                    #print("text ", each, r_X+planets[each]['Radius']*scale,r_Y)
                    #t += 0.003

print(draw(x, y, t, planets))

我把画面缩小到上面它会计算出圆圈的位置，但不会在快速画中打印出来？

Answer 1

如果您确实希望基本案例失败，那么您的函数需要再次调用您的函数：

def draw(x, y, t, planets):
    if 'Satellites' in planets["Moon"]:
        print ("fillcircle", x, y, planets["Moon"]['Radius']*scale)
    else:
        print("refresh")
        print("colour 0 0 0")
        print("clear")
        print("colour 255 255 255")
        print("fillcircle",x,y,planets['Sun']['Radius']*scale)
        print("text ", "\"Sun\"",x+planets['Sun']['Radius']*scale,y)
        if "Mercury" in planets:
            r_Mercury=planets['Mercury']['Orbital Radius']*scale;
            print("circle",x,y,r_Mercury)
            r_Xmer=x+math.sin(t*2*math.pi/planets['Mercury']['Period'])*r_Mercury
            r_Ymer=y+math.cos(t*2*math.pi/planets['Mercury']['Period'])*r_Mercury
            print("fillcircle",r_Xmer,r_Ymer,3)
            print("text ", "\"Mercury\"",r_Xmer+planets['Mercury']['Radius']*scale,r_Ymer)
        if "Venus" in planets:
            r_Venus=planets['Venus']['Orbital Radius']*scale;
            print("circle",x,y,r_Venus)
            r_Xven=x+math.sin(t*2*math.pi/planets['Venus']['Period'])*r_Venus
            r_Yven=y+math.cos(t*2*math.pi/planets['Venus']['Period'])*r_Venus
            print("fillcircle",r_Xven,r_Yven,3)
            print("text ", "\"Venus\"",r_Xven+planets['Venus']['Radius']*scale,r_Yven)
        if "Earth" in planets:
            r_Earth=planets['Earth']['Orbital Radius']*scale;
            print("circle",x,y,r_Earth)
            r_Xe=x+math.sin(t*2*math.pi/planets['Earth']['Period'])*r_Earth
            r_Ye=y+math.cos(t*2*math.pi/planets['Earth']['Period'])*r_Earth
            print("fillcircle",r_Xe,r_Ye,3)
            print("text ", "\"Earth\"",r_Xe+planets['Earth']['Radius']*scale,r_Ye)
        if "Moon" in planets:
            r_Moon=planets['Moon']['Orbital Radius']*scale;
            print("circle",r_Xe,r_Ye,r_Moon)
            r_Xm=r_Xe+math.sin(t*2*math.pi/planets['Moon']['Period'])*r_Moon
            r_Ym=r_Ye+math.cos(t*2*math.pi/planets['Moon']['Period'])*r_Moon
            print("fillcircle",r_Xm,r_Ym,3)
            print("text ", "\"Moon\"",r_Xm+planets['Moon']['Radius']*scale,r_Ym)
        if "Mars" in planets:
            r_Mars=planets['Mars']['Orbital Radius']*scale;
            print("circle",x,y,r_Mars)
            r_Xmar=x+math.sin(t*2*math.pi/planets['Mars']['Period'])*r_Mars
            r_Ymar=y+math.cos(t*2*math.pi/planets['Mars']['Period'])*r_Mars
            print("fillcircle",r_Xmar,r_Ymar,3)
            print("text ", "\"Mars\"",r_Xmar+planets['Mars']['Radius']*scale,r_Ymar)
        if "Phobos" in planets:
            r_Phobos=planets['Phobos']['Orbital Radius']*scale;
            print("circle",r_Xmar,r_Ymar,r_Phobos)
            r_Xpho=r_Xmar+math.sin(t*2*math.pi/planets['Phobos']['Period'])*r_Phobos
            r_Ypho=r_Ymar+math.cos(t*2*math.pi/planets['Phobos']['Period'])*r_Phobos
            print("fillcircle",r_Xpho,r_Ypho,3)
            print("text ", "\"Phobos\"",r_Xpho+planets['Phobos']['Radius']*scale,r_Ypho)
        if "Deimos" in planets:
            r_Deimos=planets['Deimos']['Orbital Radius']*scale;
            print("circle",r_Xmar,r_Ymar,r_Deimos)
            r_Xdei=r_Xmar+math.sin(t*2*math.pi/planets['Deimos']['Period'])*r_Deimos
            r_Ydei=r_Ymar+math.cos(t*2*math.pi/planets['Deimos']['Period'])*r_Deimos
            print("fillcircle",r_Xdei,r_Ydei,3)
            print("text ", "\"Deimos\"",r_Xpho+planets['Deimos']['Radius']*scale,r_Ydei)
        if "Ceres" in planets:
            r_Ceres=planets['Ceres']['Orbital Radius']*scale;
            print("circle",x,y,r_Ceres)
            r_Xcer=x+math.sin(t*2*math.pi/planets['Ceres']['Period'])*r_Ceres
            r_Ycer=y+math.cos(t*2*math.pi/planets['Ceres']['Period'])*r_Ceres
            print("fillcircle",r_Xcer,r_Ycer,3)
            print("text ", "\"Ceres\"",r_Xcer+planets['Ceres']['Radius']*scale,r_Ycer)
        if "Jupiter" in planets:
            r_Jupiter=planets['Jupiter']['Orbital Radius']*scale;
            print("circle",x,y,r_Jupiter)
            r_Xjup=x+math.sin(t*2*math.pi/planets['Jupiter']['Period'])*r_Jupiter
            r_Yjup=y+math.cos(t*2*math.pi/planets['Jupiter']['Period'])*r_Jupiter
            print("fillcircle",r_Xjup,r_Yjup,3)
            print("text ", "\"Jupiter\"",r_Xjup+planets['Jupiter']['Radius']*scale,r_Yjup)
        if "Io" in planets:
            r_Io=planets['Io']['Orbital Radius']*scale;
            print("circle",r_Xjup,r_Yjup,r_Io)
            r_Xio=r_Xjup+math.sin(t*2*math.pi/planets['Io']['Period'])*r_Io
            r_Yio=r_Yjup+math.cos(t*2*math.pi/planets['Io']['Period'])*r_Io
            print("fillcircle",r_Xio,r_Yio,3)
            print("text ", "\"Io\"",r_Xio+planets['Io']['Radius']*scale,r_Yio)
        if "Europa" in planets:
            r_Europa=planets['Europa']['Orbital Radius']*scale;
            print("circle",r_Xjup,r_Yjup,r_Europa)
            r_Xeur=r_Xjup+math.sin(t*2*math.pi/planets['Europa']['Period'])*r_Europa
            r_Yeur=r_Yjup+math.cos(t*2*math.pi/planets['Europa']['Period'])*r_Europa
            print("fillcircle",r_Xeur,r_Yeur,3)
            print("text ", "\"Europa\"",r_Xeur+planets['Europa']['Radius']*scale,r_Yeur)
        if "Ganymede" in planets:
            r_Ganymede=planets['Ganymede']['Orbital Radius']*scale;
            print("circle",r_Xjup,r_Yjup,r_Ganymede)
            r_Xgan=r_Xjup+math.sin(t*2*math.pi/planets['Ganymede']['Period'])*r_Ganymede
            r_Ygan=r_Yjup+math.cos(t*2*math.pi/planets['Ganymede']['Period'])*r_Ganymede
            print("fillcircle",r_Xgan,r_Ygan,3)
            print("text ", "\"Ganymede\"",r_Xgan+planets['Ganymede']['Radius']*scale,r_Ygan)
        if "Callisto" in planets:
            r_Callisto=planets['Callisto']['Orbital Radius']*scale;
            print("circle",r_Xjup,r_Yjup,r_Callisto)
            r_Xcal=r_Xjup+math.sin(t*2*math.pi/planets['Callisto']['Period'])*r_Callisto
            r_Ycal=r_Yjup+math.cos(t*2*math.pi/planets['Callisto']['Period'])*r_Callisto
            print("fillcircle",r_Xcal,r_Ycal,3)
            print("text ", "\"Callisto\"",r_Xcal+planets['Callisto']['Radius']*scale,r_Ycal)
        if "Saturn" in planets:
            r_Saturn=planets['Saturn']['Orbital Radius']*scale;
            print("circle",x,y,r_Saturn)
            r_Xsat=x+math.sin(t*2*math.pi/planets['Saturn']['Period'])*r_Saturn
            r_Ysat=y+math.cos(t*2*math.pi/planets['Saturn']['Period'])*r_Saturn
            print("fillcircle",r_Xsat,r_Ysat,3)
            print("text ", "\"Saturn\"",r_Xsat+planets['Saturn']['Radius']*scale,r_Ysat)
        if "Mimas" in planets:
            r_Mimas=planets['Mimas']['Orbital Radius']*scale;
            print("circle",r_Xsat,r_Ysat,r_Mimas)
            r_Xmim=r_Xsat+math.sin(t*2*math.pi/planets['Mimas']['Period'])*r_Mimas
            r_Ymim=r_Ysat+math.cos(t*2*math.pi/planets['Mimas']['Period'])*r_Mimas
            print("fillcircle",r_Xmim,r_Ymim,3)
            print("text ", "\"Mimas\"",r_Xmim+planets['Mimas']['Radius']*scale,r_Ymim)
        if "Enceladus" in planets:
            r_Enceladus=planets['Enceladus']['Orbital Radius']*scale;
            print("circle",r_Xsat,r_Ysat,r_Enceladus)
            r_Xenc=r_Xsat+math.sin(t*2*math.pi/planets['Enceladus']['Period'])*r_Enceladus
            r_Yenc=r_Ysat+math.cos(t*2*math.pi/planets['Enceladus']['Period'])*r_Enceladus
            print("fillcircle",r_Xenc,r_Yenc,3)
            print("text ", "\"Enceladus\"",r_Xenc+planets['Enceladus']['Radius']*scale,r_Yenc)
        if "Tethys" in planets:
            r_Tethys=planets['Tethys']['Orbital Radius']*scale;
            print("circle",r_Xsat,r_Ysat,r_Tethys)
            r_Xtet=r_Xsat+math.sin(t*2*math.pi/planets['Tethys']['Period'])*r_Tethys
            r_Ytet=r_Ysat+math.cos(t*2*math.pi/planets['Tethys']['Period'])*r_Tethys
            print("fillcircle",r_Xtet,r_Ytet,3)
            print("text ", "\"Tethys\"",r_Xtet+planets['Tethys']['Radius']*scale,r_Ytet)
        if "Dione" in planets:
            r_Dione=planets['Dione']['Orbital Radius']*scale;
            print("circle",r_Xsat,r_Ysat,r_Dione)
            r_Xdio=r_Xsat+math.sin(t*2*math.pi/planets['Dione']['Period'])*r_Dione
            r_Ydio=r_Ysat+math.cos(t*2*math.pi/planets['Dione']['Period'])*r_Dione
            print("fillcircle",r_Xdio,r_Ydio,3)
            print("text ", "\"Dione\"",r_Xdio+planets['Dione']['Radius']*scale,r_Ydio)
        if "Rhea" in planets:
            r_Rhea=planets['Rhea']['Orbital Radius']*scale;
            print("circle",r_Xsat,r_Ysat,r_Rhea)
            r_Xrhe=r_Xsat+math.sin(t*2*math.pi/planets['Rhea']['Period'])*r_Rhea
            r_Yrhe=r_Ysat+math.cos(t*2*math.pi/planets['Rhea']['Period'])*r_Rhea
            print("fillcircle",r_Xrhe,r_Yrhe,3)
            print("text ", "\"Rhea\"",r_Xrhe+planets['Rhea']['Radius']*scale,r_Yrhe)
        if "Titan" in planets:
            r_Titan=planets['Titan']['Orbital Radius']*scale;
            print("circle",r_Xsat,r_Ysat,r_Titan)
            r_Xtit=r_Xsat+math.sin(t*2*math.pi/planets['Titan']['Period'])*r_Titan
            r_Ytit=r_Ysat+math.cos(t*2*math.pi/planets['Titan']['Period'])*r_Titan
            print("fillcircle",r_Xtit,r_Ytit,3)
            print("text ", "\"Titan\"",r_Xtit+planets['Titan']['Radius']*scale,r_Ytit)
        if "Iapetus" in planets:
            r_Iapetus=planets['Iapetus']['Orbital Radius']*scale;
            print("circle",r_Xsat,r_Ysat,r_Iapetus)
            r_Xiap=r_Xsat+math.sin(t*2*math.pi/planets['Iapetus']['Period'])*r_Iapetus
            r_Yiap=r_Ysat+math.cos(t*2*math.pi/planets['Iapetus']['Period'])*r_Iapetus
            print("fillcircle",r_Xiap,r_Yiap,3)
            print("text ", "\"Iapetus\"",r_Xiap+planets['Iapetus']['Radius']*scale,r_Yiap)
        if "Uranus" in planets:
            r_Uranus=planets['Uranus']['Orbital Radius']*scale;
            print("circle",x,y,r_Uranus)
            r_Xura=x+math.sin(t*2*math.pi/planets['Uranus']['Period'])*r_Uranus
            r_Yura=y+math.cos(t*2*math.pi/planets['Uranus']['Period'])*r_Uranus
            print("fillcircle",r_Xura,r_Yura,3)
            print("text ", "\"Uranus\"",r_Xura+planets['Uranus']['Radius']*scale,r_Yura)
        if "Puck" in planets:
            r_Puck=planets['Puck']['Orbital Radius']*scale;
            print("circle",r_Xura,r_Yura,r_Puck)
            r_Xpuc=r_Xura+math.sin(t*2*math.pi/planets['Puck']['Period'])*r_Puck
            r_Ypuc=r_Yura+math.cos(t*2*math.pi/planets['Puck']['Period'])*r_Puck
            print("fillcircle",r_Xpuc,r_Ypuc,3)
            print("text ", "\"Puck\"",r_Xpuc+planets['Puck']['Radius']*scale,r_Ypuc)
        if "Miranda" in planets:
            r_Miranda=planets['Miranda']['Orbital Radius']*scale;
            print("circle",r_Xura,r_Yura,r_Miranda)
            r_Xmira=r_Xura+math.sin(t*2*math.pi/planets['Miranda']['Period'])*r_Miranda
            r_Ymira=r_Yura+math.cos(t*2*math.pi/planets['Miranda']['Period'])*r_Miranda
            print("fillcircle",r_Xmira,r_Ymira,3)
            print("text ", "\"Miranda\"",r_Xmira+planets['Miranda']['Radius']*scale,r_Ymira)
        if "Ariel" in planets:
            r_Ariel=planets['Ariel']['Orbital Radius']*scale;
            print("circle",r_Xura,r_Yura,r_Ariel)
            r_Xari=r_Xura+math.sin(t*2*math.pi/planets['Ariel']['Period'])*r_Ariel
            r_Yari=r_Yura+math.cos(t*2*math.pi/planets['Ariel']['Period'])*r_Ariel
            print("fillcircle",r_Xari,r_Yari,3)
            print("text ", "\"Ariel\"",r_Xari+planets['Ariel']['Radius']*scale,r_Yari)
        if "Umbriel" in planets:
            r_Umbriel=planets['Umbriel']['Orbital Radius']*scale;
            print("circle",r_Xura,r_Yura,r_Umbriel)
            r_Xumb=r_Xura+math.sin(t*2*math.pi/planets['Umbriel']['Period'])*r_Umbriel
            r_Yumb=r_Yura+math.cos(t*2*math.pi/planets['Umbriel']['Period'])*r_Umbriel
            print("fillcircle",r_Xumb,r_Yumb,3)
            print("text ", "\"Umbriel\"",r_Xumb+planets['Umbriel']['Radius']*scale,r_Yumb)
        if "Titania" in planets:
            r_Titania=planets['Titania']['Orbital Radius']*scale;
            print("circle",r_Xura,r_Yura,r_Titania)
            r_Xtita=r_Xura+math.sin(t*2*math.pi/planets['Titania']['Period'])*r_Titania
            r_Ytita=r_Yura+math.cos(t*2*math.pi/planets['Titania']['Period'])*r_Titania
            print("fillcircle",r_Xtita,r_Ytita,3)
            print("text ", "\"Titania\"",r_Xtita+planets['Titania']['Radius']*scale,r_Ytita)
        if "Oberon" in planets:
            r_Oberon=planets['Oberon']['Orbital Radius']*scale;
            print("circle",r_Xura,r_Yura,r_Oberon)
            r_Xober=r_Xura+math.sin(t*2*math.pi/planets['Oberon']['Period'])*r_Oberon
            r_Yober=r_Yura+math.cos(t*2*math.pi/planets['Oberon']['Period'])*r_Oberon
            print("fillcircle",r_Xober,r_Yober,3)
            print("text ", "\"Oberon\"",r_Xober+planets['Oberon']['Radius']*scale,r_Yober)
        if "Neptune" in planets:
            r_Neptune=planets['Neptune']['Orbital Radius']*scale;
            print("circle",x,y,r_Neptune)
            r_Xnep=x+math.sin(t*2*math.pi/planets['Neptune']['Period'])*r_Neptune
            r_Ynep=y+math.cos(t*2*math.pi/planets['Neptune']['Period'])*r_Neptune
            print("fillcircle",r_Xnep,r_Ynep,3)
            print("text ", "\"Neptune\"",r_Xnep+planets['Neptune']['Radius']*scale,r_Ynep)
        if "Titan" in planets:
            r_Titan=planets['Titan']['Orbital Radius']*scale;
            print("circle",r_Xnep,r_Ynep,r_Titan)
            r_Xtita=r_Xnep+math.sin(t*2*math.pi/planets['Titan']['Period'])*r_Titan
            r_Ytita=r_Ynep+math.cos(t*2*math.pi/planets['Titan']['Period'])*r_Titan
            print("fillcircle",r_Xtita,r_Ytita,3)
            print("text ", "\"Titan\"",r_Xtita+planets['Titan']['Radius']*scale,r_Ytita)

        t += 0.003
        draw(x, y, t, planets)

同样，您可能希望在某个时刻停止递归。

顺便说一下，如果你想清理你的打印陈述，这里有一种迭代行星的方法（使用它或离开它）：

for p in planets.keys():
    planet = planets[p]

我不知道这是否有用，也许可能会为你节省一些打字。

Answer 2

你可以这样：

def draw_e(x, y, t, planets):
    if 'Satellites' in planets["Moon"]:
        print ("fillcircle", x, y, planets["Moon"]['Radius']*scale)
    else:
        print("refresh")
        print("colour 0 0 0")
        print("clear")
        print("colour 255 255 255")
        print("fillcircle",x,y,planets['Sun']['Radius']*scale)
        print("text ", "\"Sun\"",x+planets['Sun']['Radius']*scale,y)

        for each in planets.keys():
            r_planet=planets[each]['Orbital Radius']*scale;
            print("circle", x, y, r_Mercury)
            r_X = x+math.sin(t*2*math.pi/planets[each]['Period'])*r_planet
            r_Y = y+math.cos(t*2*math.pi/planets[each]['Period'])*r_planet
            print("fillcircle",r_X,r_Y,3)

            print("text ", each, r_X+planets[each]['Radius']*scale,r_Y)

            t += 0.003

draw(x, y, t, planets)

Answer 3

我认为你应该首先在你的递归函数之外定义太阳，因为无论如何太阳都是固定的。

e.g。

        print("fillcircle",400,200,planets['Sun']['Radius']*scale)
        print("text ", "\"Sun\"",x+planets['Sun']['Radius']*scale,y)
             def planets:
                    if ~~~~~

也应该定义比例。

如何使函数递归

3 个答案: