Trying to Concatenate two column values in a Pandas Dataframe

Question

I am trying to concatenate two columns in pandas dataframe based on certain conditions, but I am getting this error:

ValueError: The truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all().

Below is what I am trying to do:

if df['Origin Region1'] == "EUR":
    df['Org_Region'] = df['Origin Region1'] + '' + df['Origin Region']
elif df['Origin Region1'] == "ASIA":
    df['Org_Region'] = df['Origin Region1'] ``+ '' + df['Origin Region']

Please help!

Answer 1

Try:

df['Org_Region'][df['Org_Region1'].isin(['EUR', 'ASIA'])] = 
    df['Origin Region1'] + ' ' + df['Origin Region']