我正在绘制一个海洋热图，并从MySQL检索数据集。当我运行脚本时，它崩溃并显示以下错误：
以退出代码139（被信号11中断）完成的过程： SIGSEGV）
起初我认为它必须存在于数据中，因为30万条记录不是很正确吗？但是，从数据库中选择数据集的顺序却相反，我看到的是相同的行为：300K条记录很好，310K条记录确实会导致崩溃。
第二，我尝试禁用代码中的所有不同内容，以查看导致崩溃的原因。据我所知，正是导致问题的groupby。难以确定的是，如果没有groupby，代码的其他部分将无法正常工作，但是禁用合并和数据透视不是解决方案，因此它似乎确实是groupby。
还有另一种方法可以进行分组吗？或将其拆分或其他？
我的代码：
import pandas as pd
from sqlalchemy import create_engine
import matplotlib.pyplot as plt
import seaborn as sns
import numpy as np
from matplotlib import rcParams
#mysql create engine and retrieve data and put in dataframe
engine = create_engine('mysql+mysqlconnector://[connection data]', echo=False)
connection = engine.connect()
query = connection.execute("SELECT * FROM ActivityRawData order by Time asc limit 0, 310000")
df = pd.DataFrame(query.fetchall())
df.columns = query.keys()
df['Date'] = pd.to_datetime(df['Time'])
df.set_index('Date',inplace=True)
#round for the groupby
df = df.round(1)
#groupby HR and Speed
df = df.groupby(['HR','Speed']).count().reset_index()
#create continuous values and merge to fill up and make sure plot is continuous
dfY = pd.DataFrame({'HR':np.arange(min(df['HR']), max(df['HR']),1)})
dfX = pd.DataFrame({'Speed':np.arange(min(df['Speed']), max(df['Speed']),0.1)})
df = pd.merge(df,dfY, how='outer', on='HR')
df = pd.merge(df,dfX, how='outer', on='Speed')
df = df.round(1)
data = df.pivot("HR","Speed","Distance").sort_values(by=['HR'],ascending=False).drop(np.nan,axis=1).drop(np.nan,axis=0)
#######################
## Create the graph ##
#######################
sns.set(style="white")
#plt.style.use('dark_background')
fig, ax = plt.subplots(figsize=(8,6))
ax=sns.heatmap(data,xticklabels="auto",ax = ax, robust=True, cmap='RdBu_r',cbar_kws={"shrink":.8, "label": "Count"})
#configure and set title
rcParams['axes.titlepad']=20
ax.set_title('Running Efficiency', fontsize=16, fontdict={})
#configure the x and y ticks
plt.xticks(fontsize="9", rotation=45)
plt.yticks(rotation=0, fontsize="10")
plt.ylabel("Average heart rate")
plt.xlabel("Average speed (m/s)")
#set labelsize of the colorbar
cbar = ax.collections[0].colorbar
cbar.ax.tick_params(labelsize=10)
plt.show()
以100行数据为例：
Alt Cadence Distance HR Lat Lon Speed Time
14.600000381469727 10 10670.7802734375 162 52.684949431568384 4.698166446760297 3.0510001182556152 2018-10-28 10:32:44
14.399999618530273 10 10674.26953125 161 52.68491967581213 4.6981824561953545 3.181999921798706 2018-10-28 10:32:45
14.199999809265135 10 10677.83984375 161 52.6848918478936 4.6982124634087095 3.23799991607666 2018-10-28 10:32:46
14.199999809265135 10 10680.6103515625 161 52.68487055785953 4.6982402075082055 3.23799991607666 2018-10-28 10:32:47
14.399999618530273 10 10684.169921875 161 52.68484013155103 4.698260156437755 3.125999927520752 2018-10-28 10:32:48
14.399999618530273 10 10686.75 162 52.684817416593425 4.698268957436085 3.003999948501587 2018-10-28 10:32:49
14.600000381469727 10 10689.4501953125 162 52.684792522341006 4.698286643251778 2.809000015258789 2018-10-28 10:32:50
14.800000190734865 10 10691.58984375 162 52.68477332778274 4.698283877223731 2.7709999084472656 2018-10-28 10:32:51
15 10 10693.3896484375 162 52.68475765362382 4.698276836425067 2.575000047683716 2018-10-28 10:32:52
15.199999809265135 10 10695.9599609375 161 52.684735022485256 4.69826971180737 2.565999984741211 2018-10-28 10:32:53
15.399999618530273 10 10699.419921875 161 52.684704847633846 4.698256468400358 2.743000030517578 2018-10-28 10:32:54
15.600000381469727 10 10702.3095703125 160 52.68467886373401 4.698254121467472 3.032000064849853 2018-10-28 10:32:55
15.800000190734865 10 10705.25 159 52.68465237691999 4.698256887495519 3.059999942779541 2018-10-28 10:32:56
15.600000381469727 10 10708.400390625 158 52.684624129906304 4.698261078447104 3.0699999332427983 2018-10-28 10:32:57
15.600000381469727 10 10711.990234375 158 52.68459185957909 4.698263006284833 3.1440000534057617 2018-10-28 10:32:58
15.600000381469727 10 10715.240234375 157 52.68456269055605 4.698264850303532 3.3220000267028813 2018-10-28 10:32:59
15.399999618530273 10 10717.919921875 157 52.68453855067492 4.698263173922896 3.3220000267028813 2018-10-28 10:33:00
15.199999809265135 10 10720.75 157 52.68451306968928 4.698261916637421 3.088000059127808 2018-10-28 10:33:01
15 10 10723.580078125 157 52.684487337246544 4.698260743170977 2.994999885559082 2018-10-28 10:33:02
14.800000190734865 10 10726.4599609375 157 52.684461520984776 4.698255965486169 3.0789999961853027 2018-10-28 10:33:03
14.600000381469727 10 10729.1396484375 157 52.684436459094286 4.698256803676487 3.032000064849853 2018-10-28 10:33:04
14.600000381469727 10 10731.75 158 52.68441391177476 4.698244817554952 3.032000064849853 2018-10-28 10:33:05
14.600000381469727 10 10733.66015625 158 52.68439555540681 4.698238614946604 2.7809998989105225 2018-10-28 10:33:06
14.800000190734865 10 10736.2001953125 160 52.68437401391565 4.698225958272816 2.743000030517578 2018-10-28 10:33:07
14.800000190734865 10 10739.48046875 161 52.684344844892614 4.698215480893849 2.743000030517578 2018-10-28 10:33:08
14.800000190734865 10 10742.3095703125 161 52.68431944772601 4.698211960494518 2.874000072479248 2018-10-28 10:33:09
15 10 10744.7001953125 162 52.684298409149044 4.698218666017056 2.874000072479248 2018-10-28 10:33:10
15 10 10747.0595703125 161 52.6842768676579 4.698222856968642 2.7249999046325684 2018-10-28 10:33:11
15.199999809265135 10 10749.6103515625 161 52.68425406888127 4.698230735957623 2.63100004196167 2018-10-28 10:33:12
15.199999809265135 10 10752.58984375 160 52.68422774970532 4.698239956051111 2.63100004196167 2018-10-28 10:33:13
15.199999809265135 10 10755.8896484375 160 52.68420411273837 4.6982696279883385 2.8929998874664307 2018-10-28 10:33:14
15.199999809265135 10 10758.7099609375 158 52.684180224314325 4.698285050690174 2.8929998874664307 2018-10-28 10:33:15
15.199999809265135 10 10761.25 157 52.68415843136609 4.698297204449774 2.882999897003174 2018-10-28 10:33:16
15.199999809265135 10 10763.73046875 157 52.684141919016845 4.698338359594344 2.882999897003174 2018-10-28 10:33:17
15.199999809265135 10 10766.2001953125 157 52.684122556820505 4.6983565483242264 2.82699990272522 2018-10-28 10:33:18
15.199999809265135 10 10769.3896484375 157 52.68409498035908 4.698371049016714 2.8929998874664307 2018-10-28 10:33:19
15 10 10772 157 52.6840767916292 4.698397284373642 2.7809998989105225 2018-10-28 10:33:20
15 10 10774.4697265625 157 52.68405927345157 4.698419999331237 2.7809998989105225 2018-10-28 10:33:21
14.800000190734865 10 10776.650390625 157 52.68404150381684 4.698434248566628 2.650000095367432 2018-10-28 10:33:22
14.800000190734865 10 10778.759765625 156 52.684029182419174 4.698461489751934 2.565999984741211 2018-10-28 10:33:23
14.800000190734865 10 10781.3095703125 156 52.6840139273554 4.69849057495594 2.556999921798706 2018-10-28 10:33:24
14.800000190734865 10 10783.349609375 156 52.68400403670967 4.698517145588994 2.500999927520752 2018-10-28 10:33:25
14.800000190734865 10 10786.0703125 156 52.68399615772069 4.6985556185245505 2.556999921798706 2018-10-28 10:33:26
14.800000190734865 10 10788.33984375 157 52.683991966769106 4.698589397594334 2.565999984741211 2018-10-28 10:33:27
14.800000190734865 10 10791.7099609375 157 52.68398568034172 4.698638264089824 2.63100004196167 2018-10-28 10:33:28
14.600000381469727 10 10794.7900390625 158 52.68397461622954 4.6986801736056805 3.1070001125335693 2018-10-28 10:33:29
14.800000190734865 10 10798.6103515625 158 52.683963384479284 4.698733650147915 3.125999927520752 2018-10-28 10:33:30
14.800000190734865 10 10801.5498046875 159 52.6839523203671 4.698774134740233 3.125999927520752 2018-10-28 10:33:31
15 10 10804.6298828125 159 52.683931533247225 4.6988044772297135 3.032000064849853 2018-10-28 10:33:32
15.199999809265135 10 10807.830078125 159 52.68390789628029 4.698831299319863 2.994999885559082 2018-10-28 10:33:33
15.199999809265135 10 10811.2197265625 159 52.68388685770332 4.698868095874786 2.986000061035156 2018-10-28 10:33:34
15.399999618530273 10 10813.7998046875 159 52.683868166059256 4.698890643194319 2.9210000038146973 2018-10-28 10:33:35
15.399999618530273 10 10816.8798828125 159 52.683849222958095 4.6989243384450665 2.874000072479248 2018-10-28 10:33:36
15.600000381469727 10 10819.5498046875 159 52.683832375332706 4.698952585458756 2.7709999084472656 2018-10-28 10:33:37
15.800000190734865 10 10821.490234375 159 52.68381795845925 4.698968846350908 2.5850000381469727 2018-10-28 10:33:38
16 10 10824.08984375 159 52.683800524100654 4.698995668441056 2.509999990463257 2018-10-28 10:33:39
16.200000762939453 10 10826.419921875 160 52.68378459848464 4.699018215760589 2.4820001125335693 2018-10-28 10:33:40
16.200000762939453 10 10828.66015625 161 52.68376825377345 4.6990391705185175 2.4260001182556152 2018-10-28 10:33:41
16.399999618530273 10 10832.169921875 161 52.683745371177785 4.699077475816011 2.4260001182556152 2018-10-28 10:33:42
16.399999618530273 10 10834.919921875 162 52.683722991496325 4.699094910174608 2.7709999084472656 2018-10-28 10:33:43
16.399999618530273 10 10837.58984375 162 52.683701617643244 4.6991133503615865 2.818000078201294 2018-10-28 10:33:44
16.399999618530273 10 10840.7900390625 162 52.68367672339082 4.699138244614005 2.818000078201294 2018-10-28 10:33:45
16.399999618530273 10 10843.23046875 162 52.683656355366104 4.6991525776684275 2.818000078201294 2018-10-28 10:33:46
16.200000762939453 10 10845.6103515625 161 52.683634394779794 4.699170682579278 2.6689999103546143 2018-10-28 10:33:47
16.200000762939453 10 10848.51953125 161 52.68360824324191 4.699174789711833 2.6689999103546143 2018-10-28 10:33:48
16 10 10851.9404296875 161 52.68357764929533 4.699184009805323 2.845999956130981 2018-10-28 10:33:49
15.600000381469727 10 10854.2802734375 160 52.683556862175465 4.6991913858801135 2.845999956130981 2018-10-28 10:33:50
15.399999618530273 10 10857.4599609375 160 52.68352878279985 4.699200941249729 2.9670000076293945 2018-10-28 10:33:51
15 10 10859.7998046875 160 52.683508163318045 4.699207479134202 2.697000026702881 2018-10-28 10:33:52
14.800000190734865 10 10862 159 52.68348846584559 4.699210580438376 2.697000026702881 2018-10-28 10:33:53
14.600000381469727 10 10864.5302734375 158 52.68346566706896 4.699210664257407 2.697000026702881 2018-10-28 10:33:54
14.199999809265135 10 10867.9296875 158 52.68343515694141 4.699207982048391 2.7809998989105225 2018-10-28 10:33:55
14 10 10870.849609375 157 52.683409340679646 4.6991996839642525 2.9019999504089355 2018-10-28 10:33:56
13.800000190734865 10 10873.7802734375 157 52.683384278789156 4.699186272919178 2.9479999542236333 2018-10-28 10:33:57
13.600000381469727 10 10876.4501953125 156 52.68336148001254 4.699174119159579 2.9019999504089355 2018-10-28 10:33:58
13.600000381469727 10 10878.7197265625 156 52.683341531082995 4.699167162179948 2.809000015258789 2018-10-28 10:33:59
13.600000381469727 10 10880.8603515625 156 52.68332208506764 4.699161043390632 2.6410000324249268 2018-10-28 10:34:00
13.399999618530273 10 10884.25 156 52.68329232931137 4.6991495601832876 2.6410000324249268 2018-10-28 10:34:01
13.399999618530273 10 10887.48046875 157 52.683263579383485 4.69914679415524 2.9210000038146973 2018-10-28 10:34:02
13.600000381469727 10 10890.6201171875 157 52.683235080912716 4.699149392545222 2.9210000038146973 2018-10-28 10:34:03
13.600000381469727 10 10893.5595703125 157 52.683206498622894 4.699148051440716 2.836999893188477 2018-10-28 10:34:04
13.600000381469727 10 10895.9404296875 157 52.68318470567465 4.699138579890132 2.76200008392334 2018-10-28 10:34:05
13.600000381469727 10 10897.509765625 157 52.683173390105374 4.699124582111836 2.61299991607666 2018-10-28 10:34:06
13.600000381469727 10 10899.580078125 157 52.6831560395658 4.6991130989044905 2.2950000762939453 2018-10-28 10:34:07
13.600000381469727 10 10901.830078125 157 52.683137599378824 4.699097340926529 2.2950000762939453 2018-10-28 10:34:08
13.600000381469727 10 10904.5 157 52.683116644620895 4.699075799435377 2.434999942779541 2018-10-28 10:34:09
13.600000381469727 10 10906.849609375 158 52.68309887498617 4.6990533359348765 2.5190000534057617 2018-10-28 10:34:10
13.600000381469727 10 10909.169921875 159 52.68308160826564 4.6990314591676 2.5190000534057617 2018-10-28 10:34:11
13.600000381469727 10 10911.740234375 160 52.68306417390704 4.699004888534546 2.5290000438690186 2018-10-28 10:34:12
13.600000381469727 10 10915.080078125 160 52.683039866387844 4.698975635692476 2.556999921798706 2018-10-28 10:34:13
13.800000190734865 10 10918.4404296875 161 52.683017402887344 4.6989419404417285 2.9110000133514404 2018-10-28 10:34:14
13.800000190734865 10 10922.2099609375 160 52.68299250863493 4.698903635144233 2.938999891281128 2018-10-28 10:34:15
14 10 10925.490234375 160 52.68297281116247 4.6988669224083415 3.0510001182556152 2018-10-28 10:34:16
14.199999809265135 10 10928.6103515625 159 52.682955795899026 4.698829958215357 3.059999942779541 2018-10-28 10:34:17
14.199999809265135 10 10931.6796875 158 52.682941798120744 4.698789473623037 2.9670000076293945 2018-10-28 10:34:18
14.399999618530273 10 10933.8095703125 158 52.682930901646614 4.6987626515328875 2.865000009536743 2018-10-28 10:34:19
14.399999618530273 10 10936.4404296875 158 52.68291547894478 4.698730967938901 2.6589999198913574 2018-10-28 10:34:20
14.399999618530273 10 10938.7099609375 158 52.68290064297617 4.698704229667784 2.565999984741211 2018-10-28 10:34:21
14.600000381469727 10 10940.5400390625 158 52.68288924358786 4.698678581044078 2.5380001068115234 2018-10-28 10:34:22
14.800000190734865 10 10942.7197265625 159 52.6828832924366 4.698647148907185 2.4260001182556152 2018-10-28 10:34:23