Creating loop in Pandas DataFrame with conditional value in cell

Question

In the script below, I assign the values 0 or 1 if the DataFrame cell has No or Yes in them.

answer= {\'account\': [\'Adam\', \'Ben\',          


        

Answer 1

Need replace by dict:

RPI = RPI.replace({'No':0, 'Yes':1})
print (RPI)
   a1  a2  a3  a4 account
0   0   0   0   1    Adam
1   1   1   1   0     Ben
2   1   0   0   1     Tom
3   0   0   0   1  Isabel

If need specify columns for replace by positions add iloc:

print (RPI.iloc[:, 0:4])
    a1   a2   a3   a4
0   No   No   No  Yes
1  Yes  Yes  Yes   No
2  Yes   No   No  Yes
3   No   No   No  Yes

RPI.iloc[:, 0:4] = RPI.iloc[:, 0:4].replace({'No':0, 'Yes':1})
print (RPI)
  a1 a2 a3 a4 account
0  0  0  0  1    Adam
1  1  1  1  0     Ben
2  1  0  0  1     Tom
3  0  0  0  1  Isabel