Sorting table data

[Blacktime2]

Hi everyone,

I've a difficulties with my project, I'm a novice in Python. I would like sort my column "TypeDOC" in descending order but it's not possible because of my index I think. Would you have an idea to solve my problem ?

df3 = pd.DataFrame(data=list(liste01.typeconsultation), index=liste01.iddoc, columns=['TypeDOC'])
df3 = df3[df3['TypeDOC'] == 'document']
df3['IdDOC'] = df3.index

tableau4 = pd.pivot_table(df3, index='IdDOC', values='TypeDOC', aggfunc='count')
tableau4.sort_values(by = 'TypeDOC')
tableau4

Thanks to all those who will take the time to answer me !