How can I check whether a integer data in dataframe column has same number of digits?

Question

I want to check if the column data has same number of digit.

I have following dataset

District    Prefix  Quota       
A           98426   783
A           98427   223
A           98446   127
A           98626   51
B           98049   167
B           98079   153
B           98140   120
B           98159   139
B           98169   182
B           98249   86
B           98426   588
B           98446   96
C           98049   104
C           98060   68
C           98149   65
C           98150   68
C           98159   86
C           98160   80
C           98169   113

Code to reproduce:

import pandas as pd
df = pd.DataFrame([
    ['A', 98426, 783],
    ['A', 98427, 223],
    ['A', 98446, 127],
    ['A', 98626, 51],
    ['B', 98049, 167],
    ['B', 98079, 153],
    ['B', 98140, 120],
    ['B', 98159, 139],
    ['B', 98169, 182],
    ['B', 98249, 86],
    ['B', 98426, 588],
    ['B', 98446, 96],
    ['C', 98049, 104],
    ['C', 98060, 68],
    ['C', 98149, 65],
    ['C', 98150, 68],
    ['C', 98159, 86],
    ['C', 98160, 80],
    ['C', 98169, 113]
], 
    columns=['District', 'Prefix', 'Quota'])

as you can see in "prefix" column, all the numbers is of 5 digits. but lets suppose there is inconsistency in digits like the first data is of 6 digits or 4 digits. how can I make sure all the digit in integer is same?

I tried len(str(round(df.Prefix.mean()))) that will give the number of digits but it calculates mean first and gives the number of digits of that mean. but I cant check the consistency

Answer 1

This is one approach using str.len and nunique .

Ex:

print(df['Prefix'].astype(str).str.len().nunique() == 1) #--> True