Python 3.4 MatPlotLib PdfPages值错误

Question

I keep trying to follow the examples I see for PdfPages but keep getting the value error: No such figure: None.

plot1 = Chart Generating Function(argument1, argument2,...)

from matplotlib.backends.backend_pdf import PdfPages

pp = PdfPages('sample.pdf')
pp.savefig(plot1)
plt.close() 

I've tried different variations of this (ie pdf.savefig()) but nothing seems to work.

Answer 1

I should have added more details, but somewhere in my code I had used "fig, ax = ..." when defining the figure. The "fig" part needed to be the argument in pdf.savefig(fig) in order for it to work.

Answer 2

对我来说解决问题的是在图表生成函数末尾删除了plt.show()命令。