如何在pythonreportlab中格式化YvalueAxis标签

Question

我正在用pythonreportlab创建一个垂直条形图。在

Y轴上的值是时间增量的倍（HH:MM:SS）。我必须将这些值转换为秒才能绘制图表。所以我得到了Y轴上的第二个值。在

如何根据HH:MM:SS格式格式化这些标签？？在

如果这是不可能的，我怎么能隐藏这些标签？在

Answer 1

您可以为YValueAxis.labelTextFormat设置格式化程序函数。请参见documentation的YValueAxis部分：

This determines what goes in the labels. Unlike a category axis which accepts fixed strings, the labels on a ValueAxis are supposed to be numbers. You may provide either a 'format string' like '%0.2f' (show two decimal places), or an arbitrary function which accepts a number and returns a string. One use for the latter is to convert a timestamp to a readable year-month-day format.