Как исполнять простейшие скрипты, установленные через pip install ?

C:\Users\Alex>pip install bits_parser
Collecting bits_parser
  Downloading bits_parser-1.0.1.tar.gz (11 kB)
Collecting construct==2.8.12
  Downloading construct-2.8.12.tar.gz (720 kB)
     |████████████████████████████████| 720 kB 1.7 MB/s
Collecting docopt==0.6.2
  Downloading docopt-0.6.2.tar.gz (25 kB)
Using legacy 'setup.py install' for bits-parser, since package 'wheel' is not installed.
Using legacy 'setup.py install' for construct, since package 'wheel' is not installed.
Using legacy 'setup.py install' for docopt, since package 'wheel' is not installed.
Installing collected packages: construct, docopt, bits-parser
    Running setup.py install for construct ... done
    Running setup.py install for docopt ... done
    Running setup.py install for bits-parser ... done
Successfully installed bits-parser-1.0.1 construct-2.8.12 docopt-0.6.2
WARNING: You are using pip version 20.2.3; however, version 21.0 is available.
You should consider upgrading via the 'c:\users\alex\appdata\local\programs\python\python39\python.exe -m pip install --upgrade pip' command.
 
C:\Users\Alex>python
Python 3.9.1 (tags/v3.9.1:1e5d33e, Dec  7 2020, 17:08:21) [MSC v.1927 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> bits_parser qmgr0.dat
  File "<stdin>", line 1
    bits_parser qmgr0.dat
                ^
SyntaxError: invalid syntax

C:\Users\Alex>cd /d C:\Users\Alex\AppData\Local\Programs\Python\Python39\Scripts
 
C:\Users\Alex\AppData\Local\Programs\Python\Python39\Scripts>bits_parser qmgr0.dat
"bits_parser" не является внутренней или внешней
командой, исполняемой программой или пакетным файлом.
 
C:\Users\Alex\AppData\Local\Programs\Python\Python39\Scripts>python
Python 3.9.1 (tags/v3.9.1:1e5d33e, Dec  7 2020, 17:08:21) [MSC v.1927 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> bits_parser qmgr0.dat
  File "<stdin>", line 1
    bits_parser qmgr0.dat
                ^
SyntaxError: invalid syntax
>>> bits_parser
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'bits_parser' is not defined
>>> ^Z
 
 
C:\Users\Alex\AppData\Local\Programs\Python\Python39\Scripts>path
PATH=C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\Users\Alex\AppData\Local\Programs\Python\Python39\Scripts\;C:\Users\Alex\AppData\Local\Programs\Python\Python39\;C:\Users\Alex\AppData\Local\Microsoft\WindowsApps;