[Python] How can I display raw string of regex with ValueError in python?

I would like to display raw string of regex expression as it looks. I works with print but it does not work with ValueError. How can I display raw string of regex expression as it looks with ValueError?

pattern = r"\\d\{(\d+)\}"
print(f"pattern with print ={pattern}")
raise ValueError(f"pattern with ValueError ={pattern}")


The followings are outputs.

pattern with print =\\d\{(\d+)\}
pattern with ValueError =\\\\d\\{(\\d+)\\}"

Continue reading...