Error using dexseq_counts.py

Question

[felipead66]

I am trying to use dexseq_counts.py to find exon counts. I used ensemble gtf file for the dexseq_prepare_annotation.py in order to generate the gff file.

When I attempt to use dexseq_counts.py I gen the following error:

line 120 raise SystemError, "illegal strand" SyntaxError: invalid syntax

Does anyone have an idea how to solve it? The code I used was:

python3 path_to_python_scripts/python_scripts/dexseq_counts.py -r pos ensemble_dexseq_mouse.gff sample1.gff sample1.txt