pathをしても、ライブラリをインポートすることができない。

streamlitを利用したアプリをWebサイトを見ながら開発しています。

発生している問題・エラーメッセージ

streamlit run /Users/lab_1/Downloads/会議室予約システムAPI/app.py
zsh: command not found: streamlit

該当のソースコード

python
1moro@Aries 会議室予約システムAPI % pip3 show streamlit                                                 
2Name: streamlit
3Version: 1.3.0
4Summary: The fastest way to build data apps in Python
5Home-page: https://streamlit.io
6Author: Streamlit Inc
7Author-email: hello@streamlit.io
8License: Apache 2
9Location: /Users/lab_1/Library/Python/3.8/lib/python/site-packages
10Requires: altair, astor, attrs, base58, blinker, cachetools, click, gitpython, numpy, packaging, pandas, pillow, protobuf, pyarrow, pydeck, pympler, python-dateutil, requests, toml, tornado, tzlocal, validators
11Required-by:

python
1import streamlit as st
2import datetime
3import random
4import requests
5import json
6import sys
7print(sys.path)
8sys.path.append("/Users/lab_1/Library/Python/3.8/lib/python/site-packages")#ここでパスを追加しています。
9page = st.sidebar.selectbox('Choose your page', ['users', 'rooms', 'bookings'])
10
11
12#実行結果
13moro@Aries 会議室予約システムAPI % /usr/bin/python3 /Users/lab_1/Downloads/会議室予約システムAPI/app.py
14['/Users/lab_1/Downloads/会議室予約システムAPI', '/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/lib/python38.zip', '/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8', '/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/lib-dynload', '/Users/lab_1/Library/Python/3.8/lib/python/site-packages', '/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/site-packages']
152021-12-18 16:49:13.003 
16  Warning: to view this Streamlit app on a browser, run it with the following
17  command:
18
19    streamlit run /Users/lab_1/Downloads/会議室予約システムAPI/app.py [ARGUMENTS]