Installing pyodbc seems to work, but python cannot find the

Question

I was able to install pyodbc just fine it seems:

pip install pyodbc-4.0.32-cp310-cp310-win_amd64.whl
Processing c:\users\name\appdata\local\programs\python\python310\scripts\pyodbc-4.0.32-cp310-cp310-win_amd64.whl
Installing collected packages: pyodbc
Successfully installed pyodbc-4.0.32

But when I run the code, it fails with the generic error

pyodbc.InterfaceError: ('IM002', '[IM002] [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified (0) (SQLDriverConnect)')

Here's the code:

import pyodbc

print("Drivers")
print (pyodbc.drivers())

print ("Sources")
sources = pyodbc.dataSources()
keys = sources.keys()
for key in keys: 
   print (key)

conn_str = (r'DRIVER={Microsoft Access Driver (*.mdb, *.accdb)};'
            r'DBQ=C:\pyfun\TradingHubOutput.accdb;')
conn = pyodbc.connect(conn_str)
cursor = conn.cursor()

Here's the output:

Drivers
['SQL Server']
Sources
Traceback (most recent call last):
  File "C:\pyfun\playing with DB.py", line 14, in <module>
    conn = pyodbc.connect(conn_str)
pyodbc.InterfaceError: ('IM002', '[IM002] [Microsoft][ODBC Driver Manager] Data source name not found and no default driver specified (0) (SQLDriverConnect)')

So only one driver. No data sources listed. pyodbc installed ok - rerunning the command gives a confirmation it is install and only prompts for a forced reinstall.

What's going on?