How to calculate the percentage of each value in a column follow each category in python pandas dataframe

Question

I'm having a dataframe and trying to get the output which shows percentage of each value in different category. Can anyone help on how can I do it?

Raw data table:

Interface_Bin	Product
1	ADL
1	ADL
22	ADL
97	ADL
1	JSL
1	JSL
97	JSL
97	JSL
22	JSL

Expected outcome:

Product	Bin(97)_count	Total_interfacebin_count	Bin_97_percentage_vs total count
ADL	1	4	25%
JSL	2	5	40%

Thanks alot.

Answer 1

first sort the data so you get a dictionary (or list) like: {"ADL":121,"JSL":218} probably with code like

for element in table row:
  if dict.contains(element.key) //in this case ADL or JSL
    dict[element.key].value+=element.value
  else
    dict[element.key]=element.value

then go through and sum all the dictionary values to get the total sum, or sum them as you add to the dictionary in the above code finally get each percentage as (dict[key].value/sum)*100 + "%"

Answer 2

Use crosstab with concat :

df = pd.crosstab(df['Product'], df['Interface_Bin'])

f1 = lambda x: f'Bin({x})_count'
f2 = lambda x: f'Bin({x})_percentage_vs total count'
s = df.sum(axis=1).rename('Total_interfacebin_count')

df2 = df.div(s, axis=0).rename(columns=f2).mul(100)
df = pd.concat([df.rename(columns=f1), s, df2], axis=1).sort_index(axis=1)
print (df)
         Bin(1)_count  Bin(1)_percentage_vs total count  Bin(22)_count  \
Product                                                                  
ADL                 2                              50.0              1   
JSL                 2                              40.0              1   

         Bin(22)_percentage_vs total count  Bin(97)_count  \
Product                                                     
ADL                                   25.0              1   
JSL                                   20.0              2   

         Bin(97)_percentage_vs total count  Total_interfacebin_count  
Product                                                               
ADL                                   25.0                         4  
JSL                                   40.0                         5