解决方案：
File "/usr/local/lib/python3.7/lzma.py", line 27, in <module>
from _lzma import *
ModuleNotFoundError: No module named '_lzma'
yum install xz-devel
yum install python-backports-lzma
pip install backports.lzma
# 然后找到 lzma.py 文件，vi命令去改写它
修改前
from _lzma import *
from _lzma import _encode_filter_properties, _decode_filter_properties修改后
try:
from _lzma import *
from _lzma import _encode_filter_properties, _decode_filter_properties
except ImportError:
from backports.lzma import *
from backports.lzma import _encode_filter_properties, _decode_filter_properties