I want to combine 3 columns with dollar signs,
import pandas as pd
import numpy as np
df = pd.DataFrame({"a":["$car"], "b": ["$food"],"c":[np.nan]})
df['combine'] = df['a'].fillna('') + ' ' + df['b'].fillna('') + ' ' + df['c'].fillna('')
I knew that's an interpretation issue in jupyter notebook/python, please advise on it.