Part B

The dataset file in assets$/$grades$.$txt contains a line separated list of people with their grade in a class. Create a regex to generate a list of just those students who received a $B$ in the course.

$[12]$:

import re

def grades$()$:

with open $("$assets$/$grades$.$txt$","$r$")$ as file:

grades $=$ file. read$()$

# Regex pattern to match names followed by a $\text{'}B\text{'}$

pattern $=r^{\text{'}}\frac{[A-Za-z]+}{\frac{?}{?}}s{B}^{\text{'}}$

# Find all matches and return a list of names

return re$.$findall$($pattern$,$ grades$)$

$[11]$: assertlen$(grades())==16$

AssertionError

Traceback $($most recent call last$)$

Cell In $[11],$ line $1$

longrightarrow$1$ assert len$(grades())==16$

AssertionError: