The problem about the second step

[zhangxj59]

thanks for sharing such great works
when I run "pip install boto3 tqdm tensorflow_datasets --index-url=https://mirrors.aliyun.com/pypi/simple/"
there is something wrong happened like below:
Looking in indexes: https://mirrors.aliyun.com/pypi/simple/
Collecting boto3
Downloading https://mirrors.aliyun.com/pypi/packages/f1/99/43e5571005c792284276986eabd956699fac65d283df409b1482ca8722d8/boto3-1.17.67-py2.py3-none-any.whl (131kB)
|████████████████████████████████| 133kB 5.5MB/s
Collecting tqdm
Downloading https://mirrors.aliyun.com/pypi/packages/72/8a/34efae5cf9924328a8f34eeb2fdaae14c011462d9f0e3fcded48e1266d1c/tqdm-4.60.0-py2.py3-none-any.whl (75kB)
|████████████████████████████████| 81kB 14.7MB/s
Collecting tensorflow_datasets
Downloading https://mirrors.aliyun.com/pypi/packages/fe/52/9b9f6312cfa29c39445d22a3ba45f6279db1937de9df93c9fb65dcf0e42a/tensorflow-datasets-3.2.1.tar.gz (2.9MB)
|████████████████████████████████| 2.9MB 30.2MB/s
Collecting jmespath<1.0.0,>=0.7.1
Downloading https://mirrors.aliyun.com/pypi/packages/07/cb/5f001272b6faeb23c1c9e0acc04d48eaaf5c862c17709d20e3469c6e0139/jmespath-0.10.0-py2.py3-none-any.whl
ERROR: Could not find a version that satisfies the requirement botocore<1.21.0,>=1.20.67 (from boto3) (from versions: 0.4.1, 0.4.2, 0....)
ERROR: No matching distribution found for botocore<1.21.0,>=1.20.67 (from boto3)

I‘m confused about this.
May you provide the solution?
PS ：
Here is my environment：
OS ：Ubuntu 16.04.6
env：set up as you said