python regular expression match a pattern

Question

So, I have been trying to match a simple pattern like B0000001 where just the first character be an alphabet " B " and rest should be numbers. The total length should be 9.

I tried the pattern "^B[0-9]{7}$" but it fails most of the time. Any suggestions?

Answer 1

Use this expresion:

^B\d{8}$

Demo