Matplotlib uses broken pdfmarks in latex

Question

I have a really weird problem:

plt.xlabel("$t$[ms]")    
plt.ylabel("$\dot{q}$[deg]")  
plt.axvline(x=span2Stop,lw='0.3',c='0.5')
plt.axvspan(spanStart, spanStop, facecolor='0.9', alpha=1,edgecolor='0.9',lw=0)
plt.annotate('11ms',fontsize='9', xy=(11, -500),xytext=(2, -500),verticalalignment='center',arrowprops=myarrow)
plt.annotate('13ms',fontsize='9', xy=(13, 1000),xytext=(2, 1000),verticalalignment='center',arrowprops=myarrow)
plt.annotate('17ms',fontsize='9', xy=(17, -500),xytext=(20, -500),verticalalignment='center',arrowprops=myarrow)
plt.tight_layout()
plt.savefig(imagePath + "snapAHVjoints.pdf")
plt.savefig(imagePath + "snapAHVjoints.svg")
plt.show()

generates a nice looking picture. But plt.axvline(x=span2Stop,lw='0.3',c='0.5') causes a broken pdfmark in the exported pdf if included in latex as a pdf. I spent ages to find that.

Compiled with xelatex to pdf. The problem does not seem to be related to the loaded packages (to be honest I didn't try to to disable hyperref but tested almost all options I found).

Any Idea what's wrong with that?

Answer 1

lw='0.3' should be lw=0.3 Nevertheless, no broken pdf should be exported. If you export it as eps matplotlib complains, so I recognized it that way

Is that a bug or am I again getting wrong soem pythonic things?