rdb -c memory , Throw an exception: "pkg_resources.DistributionNotFound: redis"

[andylee2020888]

python 2.7
rdbtools 0.1.15

rdb -c memory redis.rdb --bytes 128 -f redis.csv

Throw an exception:
Traceback (most recent call last):
File "/usr/local/bin/rdb", line 5, in
from pkg_resources import load_entry_point
File "build/bdist.linux-x86_64/egg/pkg_resources.py", line 2603, in
File "build/bdist.linux-x86_64/egg/pkg_resources.py", line 666, in require
File "build/bdist.linux-x86_64/egg/pkg_resources.py", line 565, in resolve
pkg_resources.DistributionNotFound: redis

[bearAss13]

pip install redis

[id-id-id]

I have the same question, but i have installed redis. my redis is 5.0.6