Looks like axvline doesn't work on the second axes correctly (See code). Also if I set ymin=0, ymax=10, ylim=(-1, 11) it draw line from bottom to the top of the axes rather than from 0 to 10. IPython ...

Use matplotlib draw pictures，The results are different, there will be two images stacked together, as if they were interfered by the previous program。 the code is： "import pandas as pd\nimport ...