[Python] regex to find a string contains words with both letters and digits

I am trying to write a regex to find a string contains words with both letters and digits (NOT A CHECK FOR ALPHANUMERIC because word should strictly contain both letters and digits).

I have come up with this ^(?=.*[a-zA-Z])(?=.*[0-9])

Here's the link to the above regex: https://regex101.com/r/Y97ykL/1

Above regex works for simple scenarios like below

1. 
   a1b4cc -> true (contains both letters and digits)
   
   
2. 
   abc -> false (contains only letters)
   
   
3. 
   123 -> false (contains only digits)
   

But there are few scenarios which I am not able to cover with the above regex. How can I update my above regex to also work for the below examples?

1. 
   abc d77hv -> True ( Since efg123 contains both letter and digits)
   
   
2. 
   798 h7ghd -> True (Since h7ghd contains both letters and digits)
   
   
3. 
   798 abcd -> False (Since there is no word containing both letter and digits)
   

I am not too familiar with regex but is it possible to write a regex to do the check for the above described scenarios without iterating over each word in a string? Thanks for the help!

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