Reformat pandas DataFrame

Question

I have a pandas.DataFrame with the following data:

 country    branch      Name           salary    mobile no     emailid
    x             


        

Answer 1

You can replace Null to NaN and then groupby with agg and last reset_index:

print data_df
  country branch Name  salary   mobile no    emailid position
0       x      a   aa  250000        Null       Null  unknown
1       x      b   bb  350000  8976646410  xx@xx.com  unknown
2       y      c   cc  450000  8777945411  yy@yy.com  unknown
3       y      d   dd  589630        Null       Null  unknown

data_df = data_df.replace('Null', np.nan)
print data_df
  country branch Name  salary   mobile no    emailid position
0       x      a   aa  250000         NaN        NaN  unknown
1       x      b   bb  350000  8976646410  xx@xx.com  unknown
2       y      c   cc  450000  8777945411  yy@yy.com  unknown
3       y      d   dd  589630         NaN        NaN  unknown

df = data_df.groupby(['country', 'branch']).agg({'Name': 'count',
                                                 'mobile no':'count', 
                                                 'emailid': 'count',
                                                 'position': 'count'})

print df.reset_index()
  country branch  emailid  position  Name  mobile no
0       x      a        0         1     1          0
1       x      b        1         1     1          1
2       y      c        1         1     1          1
3       y      d        0         1     1          0

EDIT:

If you need count positions by category, create columns for each category, then groupby with count, drop column salary and last reset_index:

print data_df
  country branch Name  salary   mobile no    emailid
0       x      a   aa  250000        Null       Null
1       x      a   aa   20000        Null       Null
2       x      b   bb  350000  8976646410  xx@xx.com
3       y      c   cc   45000  8777945411  yy@yy.com
4       y      d   dd  589630        Null       Null

normal = data_df['salary'] <= 20000
experienced = (data_df['salary'] > 20000) & (data_df['salary'] <= 50000)
unknown = data_df['salary'] > 50000

data_df.loc[normal, 'position_normal'] = 'normal employee'
data_df.loc[experienced,'position_experienced'] = 'experienced employee'
data_df.loc[unknown,'position_unknown'] = 'unknown employee'
print data_df
  country branch Name  salary   mobile no    emailid  position_normal  \
0       x      a   aa  250000        Null       Null              NaN   
1       x      a   aa   20000        Null       Null  normal employee   
2       x      b   bb  350000  8976646410  xx@xx.com              NaN   
3       y      c   cc   45000  8777945411  yy@yy.com              NaN   
4       y      d   dd  589630        Null       Null              NaN   

   position_experienced  position_unknown  
0                   NaN  unknown employee  
1                   NaN               NaN  
2                   NaN  unknown employee  
3  experienced employee               NaN  
4                   NaN  unknown employee 

#replace Null to NaN
data_df = data_df.replace('Null', np.nan)
df = data_df.groupby(['country', 'branch']).count()
#remove column salary
df = df.drop('salary', axis=1)

df = df.reset_index()
print df
  country branch  Name  mobile no  emailid  position_normal  \
0       x      a     2          0        0                1   
1       x      b     1          1        1                0   
2       y      c     1          1        1                0   
3       y      d     1          0        0                0   

   position_experienced  position_unknown  
0                     0                 1  
1                     0                 1  
2                     1                 0  
3                     0                 1