Python for syntax conversion

[Gribouillis]

If you don't mind using someone else's code, there is a module in pypi named 'text2digits' under the MIT licence that does the number conversion

>>> from text2digits import text2digits
>>> td2 = text2digits.Text2Digits()
>>> td2.convert("I'm twenty five years old")
"I'm 25 years old"
>>> td2.convert("seventy two")
'72'

Considering that you are a beginner in python, it would probably be a good idea to use this code instead of rewriting your own. You will probably meet many other issues before the project is complete.