具体如下：
Traceback (most recent call last):
File "PennSeq.py", line 114, in <module>
for read in bamFilePysam.fetch(geneChr, geneStart, geneEnd):
File "pysam/libcalignmentfile.pyx", line 1066, in pysam.libcalignmentfile.AlignmentFile.fetch
File "pysam/libchtslib.pyx", line 675, in pysam.libchtslib.HTSFile.parse_region
ValueError: invalid contig `chr8_KI270816v1_alt`
求大神帮忙解决！