Replace currency symbol by word in Python

Question

I have a file of about 50000 tweets and I want to replace all the currency symbols by words so that $10 becomes 10 dollars.

How can I do that in Python?

I can find the symbols using a regex: [$][0-9]+ . I am not sure how to replace that by words and and also interchange the positions of the number and symbol.

My tweets have only $ symbols and no other currency symbols. Please help.

Answer 1

re.sub(..) is your friend.

>>> re.sub(r"\$(\d+)", r"\1 dollars", "$10")
'10 dollars'