# 1. Split the combined column into two new, clean columns
df[['department', 'region']] = df['department_region'].str.split('-', expand=True)
Next, I’ll drop the department_region column since it’s pretty much useless now
# 2. Drop the redundant combined column
df.drop('department_region', axis=1, inplace=True)
Let’s review our new columns
print(df[[‘department’, ‘region’]])