Remove digits from a string when they are followed by a letter pattern

Question

I have three strings as follows

ex1 = "All is good 24STREET"
ex2 = "Is this the weight 2.5OZ"
ex3 = "Feeling good 100pc"

I want to remove only the digits when they are followed by 'OZ' or 'pc' but not with others.

**results**
    ex1 = "All is good 24STREET"
    ex2 = "Is this the weight OZ"
    ex3 = "Feeling good pc"

I tried with 'str.replace('\d+', '')' but this removes all digits and also not the "dot"

Answer 1

import re

ex1 = "All is good 24STREET"
ex2 = "Is this the weight 2.5OZ"
ex3 = "Feeling good 100pc"
reg = re.compile(r'[\d.]+(?=OZ|pc)')
print(reg.sub('', ex1))
print(reg.sub('', ex2))
print(reg.sub('', ex3))

Output:

All is good 24STREET

Is this the weight OZ

Feeling good pc