invalid syntax in hisat2_read_statistics.py

[qj009]

Hello,
When I ran CIRI-quant, it gave out an error below:

File ".conda/envs/CIRIquant/bin/hisat2_read_statistics.py", line 182
length_map = sorted(length_map.iteritems(), key=lambda (k,v):(v,k), reverse=True)
^
SyntaxError: invalid syntax

However, it still finish the circular RNA quantification and output a gtf file. Does this error matters?

Thank you!