Replacing specific words in a string (Python)

Question

I would like to replace words in a string sentence such as:

What $noun$ is $verb$?

What's the regular expression to replace the characters in '$ $' (inclusive) with actual nouns/verbs?

Answer 1

You don't need a regular expression for that. I would do

str = "What $noun$ is $verb$?"
print str.replace("$noun$", "the heck")

Only use regular expressions when needed. It's generally slower.