Passing a list to pandas loc method

Question

I'd like to change the values of certain columns in a pandas dataframe. But I can't seem to do if I pass a list of columns inside loc.

df = pd.DataFrame({
"ID" : [1, 2, 3, 4, 5],
"QA_needed" : [0, 1, 1, 0, 1],
"QC_needed" : [1, 0, 1, 0, 0],
"Report_needed" : [1, 1, 1, 0, 1]
})

df.loc[:, ["QA_needed", "Report_needed"]].replace({1: "True", 0: "False"}, inplace=True)

To do this I have to replace the values for each column individually

df.loc[:, "QA_needed"].replace({1: "True", 0: "False"}, inplace=True)
df.loc[:, "QC_needed"].replace({1: "True", 0: "False"}, inplace=True)

Is there a way to pass the list ["QA_needed", "Report_needed"] to the loc method?

Answer 1

Try update

df.update(df.loc[:, ["QA_needed", "Report_needed"]].replace({1: "True", 0: "False"}))
df
Out[96]: 
   ID QA_needed  QC_needed Report_needed
0   1     False          1          True
1   2      True          0          True
2   3      True          1          True
3   4     False          0         False
4   5      True          0          True