问题遇到的现象和发生背景
图像画的过程中一段时间可以显示，但又突然消失，一直不显示，完整的图像应该是y=1/x的图像
部分代码
import turtle
bili = 30.0
jiange = 1
turtle.pensize(1)
turtle.hideturtle()
turtle.speed(100)
#部分数据
ww={ '-7.200000000000042': -0.1388888888888881, '-7.160000000000042': -0.13966480446927293, '-7.120000000000042': -0.14044943820224637, '-7.080000000000042': -0.14124293785310651, '-7.040000000000042': -0.1420454545454537, '-7.000000000000042': -0.14285714285714202, '-6.960000000000042': -0.14367816091953936, '-6.920000000000042': -0.14450867052023034, '-6.880000000000042': -0.14534883720930145, '-6.840000000000042': -0.14619883040935583, '-6.800000000000042': -0.14705882352941085, '-6.7600000000000415': -0.14792899408283933, '-6.7200000000000415': -0.1488095238095229, '-6.6800000000000415': -0.14970059880239428, '-6.640000000000041': -0.1506024096385533, '-6.600000000000041': -0.15151515151515058, '-6.560000000000041': -0.15243902439024293, '-6.520000000000041': -0.1533742331288334, '-6.480000000000041': -0.15432098765432, '-6.440000000000041': -0.15527950310558908, '-6.400000000000041': -0.156249999999999, '-6.360000000000041': -0.15723270440251472, '-6.320000000000041': -0.1582278481012648, '-6.280000000000041': -0.15923566878980788, '-6.240000000000041': -0.16025641025640922, '-6.200000000000041': -0.1612903225806441, '-6.160000000000041': -0.16233766233766125, '-6.120000000000041': -0.16339869281045644, '-6.080000000000041': -0.16447368421052522, '-6.040000000000041': -0.16556291390728364, '-6.000000000000041': -0.16666666666666552, '-5.960000000000041': -0.1677852348993277, '-5.920000000000041': -0.16891891891891775, '-5.880000000000041': -0.17006802721088318, '-5.840000000000041': -0.17123287671232756, '-5.800000000000041': -0.17241379310344707, '-5.760000000000041': -0.17361111111110988, '-5.720000000000041': -0.1748251748251736, '-5.680000000000041': -0.17605633802816775, '-5.6400000000000405': -0.17730496453900582, '-5.6000000000000405': -0.17857142857142727, '-5.5600000000000405': -0.17985611510791236, '-5.52000000000004': -0.18115942028985374, '-5.48000000000004': -0.18248175182481619, '-5.44000000000004': -0.18382352941176333, '-5.40000000000004': -0.18518518518518381, '-5.36000000000004': -0.18656716417910307, '-5.32000000000004': -0.18796992481202865, '-5.28000000000004': -0.18939393939393795, '-5.24000000000004': -0.1908396946564871, '-5.20000000000004': -0.19230769230769082, '-5.16000000000004': -0.19379844961240159, '-5.12000000000004': -0.19531249999999847, '-5.08000000000004': -0.19685039370078586, '-5.04000000000004': -0.19841269841269685, '-5.00000000000004': -0.1999999999999984, '-4.96000000000004': -0.20161290322580483, '-4.92000000000004': -0.20325203252032356, '-4.88000000000004': -0.20491803278688356, '-4.84000000000004': -0.2066115702479322, '-4.80000000000004': -0.2083333333333316, '-4.76000000000004': -0.21008403361344363, '-4.72000000000004': -0.21186440677965923, '-4.68000000000004': -0.21367521367521186, '-4.64000000000004': -0.2155172413793085, '-4.60000000000004': -0.21739130434782422, '-4.56000000000004': -0.2192982456140332, '-4.5200000000000395': -0.2212389380530954, '-4.4800000000000395': -0.22321428571428376, '-4.4400000000000395': -0.22522522522522323, '-4.400000000000039': -0.22727272727272524, '-4.360000000000039': -0.22935779816513555, '-4.320000000000039': -0.23148148148147937, '-4.280000000000039': -0.23364485981308197, '-4.240000000000039': -0.2358490566037714, '-4.200000000000039': -0.23809523809523586, '-4.160000000000039': -0.24038461538461312, '-4.120000000000039': -0.24271844660193945, '-4.080000000000039': -0.24509803921568393, '-4.040000000000039': -0.24752475247524514, '-4.000000000000039': -0.24999999999999756, '-3.960000000000039': -0.25252525252525004, '-3.920000000000039': -0.255102040816324, '-3.880000000000039': -0.257731958762884, '-3.840000000000039': -0.260416666666664, '-3.800000000000039': -0.2631578947368394, '-3.760000000000039': -0.2659574468085079, '-3.720000000000039': -0.2688172043010725, '-3.680000000000039': -0.27173913043477976, '-3.6400000000000388': -0.2747252747252718, '-3.6000000000000387': -0.2777777777777748, '-3.5600000000000387': -0.28089887640449135, '-3.5200000000000387': -0.28409090909090595, '-3.4800000000000386': -0.2873563218390773, '-3.4400000000000386': -0.2906976744186014, '-3.4000000000000385': -0.2941176470588202, '-3.3600000000000385': -0.29761904761904423, '-3.3200000000000385': -0.30120481927710496, '-3.2800000000000384': -0.30487804878048425, '-3.2400000000000384': -0.3086419753086383, '-3.2000000000000384': -0.3124999999999963, '-3.1600000000000383': -0.3164556962025278, '-3.1200000000000383': -0.3205128205128166, '-3.0800000000000383': -0.3246753246753206, '-3.0400000000000382': -0.3289473684210485, '-3.000000000000038': -0.3333333333333291, '-2.960000000000038': -0.3378378378378335, '-2.920000000000038': -0.3424657534246531, '-2.880000000000038': -0.34722222222221766, '-2.840000000000038': -0.3521126760563333, '-2.800000000000038': -0.3571428571428523, '-2.760000000000038': -0.36231884057970515, '-2.720000000000038': -0.3676470588235243, '-2.680000000000038': -0.3731343283582037, '-2.640000000000038': -0.37878787878787334, '-2.600000000000038': -0.38461538461537903, '-2.560000000000038': -0.3906249999999942, '-2.5200000000000378': -0.39682539682539086, '-2.4800000000000377': -0.40322580645160677, '-2.4400000000000377': -0.4098360655737642, '-2.4000000000000377': -0.41666666666666013, '-2.3600000000000376': -0.4237288135593153, '-2.3200000000000376': -0.4310344827586137, '-2.2800000000000376': -0.43859649122806293, '-2.2400000000000375': -0.44642857142856396, '-2.2000000000000375': -0.4545454545454468, '-2.1600000000000374': -0.4629629629629549, '-2.1200000000000374': -0.47169811320753885, '-2.0800000000000374': -0.4807692307692221, '-2.0400000000000373': -0.4901960784313636, '-2.0000000000000373': -0.4999999999999907, '-1.9600000000000373': -0.5102040816326434, '-1.9200000000000372': -0.5208333333333233, '-1.8800000000000372': -0.5319148936170107, '-1.8400000000000372': -0.5434782608695542, '-1.8000000000000371': -0.5555555555555441, '-1.760000000000037': -0.5681818181818062, '-1.720000000000037': -0.5813953488371968, '-1.680000000000037': -0.5952380952380821, '-1.640000000000037': -0.6097560975609618, '-1.600000000000037': -0.6249999999999856, '-1.560000000000037': -0.6410256410256259, '-1.5200000000000369': -0.6578947368420893, '-1.4800000000000368': -0.6756756756756589, '-1.4400000000000368': -0.6944444444444267, '-1.4000000000000368': -0.7142857142856955, '-1.3600000000000367': -0.735294117647039, '-1.3200000000000367': -0.7575757575757365, '-1.2800000000000367': -0.7812499999999776, '-1.2400000000000366': -0.806451612903202, '-1.2000000000000366': -0.833333333333308, '-1.1600000000000366': -0.8620689655172142, '-1.1200000000000365': -0.8928571428571137, '-1.0800000000000365': -0.9259259259258946, '-1.0400000000000365': -0.9615384615384278, '-1.0000000000000364': -0.9999999999999636, '-0.9600000000000364': -1.0416666666666272, '-0.9200000000000363': -1.0869565217390875, '-0.8800000000000363': -1.1363636363635894, '-0.8400000000000363': -1.1904761904761392, '-0.8000000000000362': -1.2499999999999434, '-0.7600000000000362': -1.3157894736841478, '-0.7200000000000362': -1.3888888888888191, '-0.6800000000000361': -1.4705882352940396, '-0.6400000000000361': -1.5624999999999118, '-0.6000000000000361': -1.6666666666665666, '-0.560000000000036': -1.7857142857141708, '-0.520000000000036': -1.92307692307679, '-0.480000000000036': -2.083333333333177, '-0.44000000000003603': -2.2727272727270864, '-0.40000000000003605': -2.499999999999775, '-0.36000000000003607': -2.7777777777774997, '-0.3200000000000361': -3.1249999999996474, '-0.2800000000000361': -3.5714285714281107, '-0.2400000000000361': -4.16666666666604, '-0.2000000000000361': -4.999999999999098, '-0.16000000000003609': -6.2499999999985905, '-0.12000000000003608': -8.333333333330827, '-0.08000000000003607': -12.499999999994364, '-0.04000000000003607': -24.999999999977458, '-3.606837051250977e-14': 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'1.919999999999965': 0.5208333333333428, '1.959999999999965': 0.5102040816326622, '1.9999999999999651': 0.5000000000000088, '2.039999999999965': 0.49019607843138097, '2.079999999999965': 0.4807692307692389, '2.119999999999965': 0.47169811320755495, '2.159999999999965': 0.46296296296297046, '2.199999999999965': 0.45454545454546175, '2.239999999999965': 0.4464285714285784, '2.279999999999965': 0.43859649122807687, '2.319999999999965': 0.43103448275862716, '2.3599999999999652': 0.4237288135593283, '2.3999999999999653': 0.4166666666666727, '2.4399999999999653': 0.40983606557377633, '2.4799999999999653': 0.40322580645161854, '2.5199999999999654': 0.3968253968254023, '2.5599999999999654': 0.3906250000000053, '2.5999999999999654': 0.38461538461538974, '2.6399999999999655': 0.3787878787878837, '2.6799999999999655': 0.37313432835821375, '2.7199999999999656': 0.36764705882353405, '2.7599999999999656': 0.36231884057971464, '2.7999999999999656': 0.35714285714286154, '2.8399999999999657': 0.3521126760563423, '2.8799999999999657': 0.3472222222222264, '2.9199999999999657': 0.34246575342466157, '2.9599999999999658': 0.33783783783784177, '2.999999999999966': 0.33333333333333715, '3.039999999999966': 0.3289473684210563, '3.079999999999966': 0.3246753246753283, '3.119999999999966': 0.32051282051282404, '3.159999999999966': 0.31645569620253505, '3.199999999999966': 0.31250000000000333}
turtle.pencolor('red')
turtle.penup()
for item in ww:
y = ww[item]
hh="{}/{}*{}".format(item,jiange,bili)
x = eval(hh)
hh = "{}/{}*{}".format(y,jiange, bili)
y = eval(hh)
turtle.goto(x,y)
turtle.pendown()
turtle.mainloop()
