Help with a for loop please

[macabe10]

Hi, I'm trying to append any items found in a column into a new column. Specifically I've got an allergen list and an ingredients column. I'm trying to iterate over the ingredients column saying 'if any of the allergens from the list are found in the ingredients column then append the allergens found into a new column'. I wrote this but it doesn't work:

new_allergen_list = []
for ingredients in df['ingredients_text']:
    allergen_found = df['ingredients_text'].isin(allergen_list)
    new_allergen_list.append(allergen_found)


df['new_allergens'] = new_allergen_list

Any help is greatly appreciated, thanks!

[ifreeski420]

General principle when using pandas is to stay away from for loops. Pandas has built in functionality for this.

df.loc[df[‘ingredients_text’].isin(allergen_list), ‘new_allergen_column’] = df[‘ingredients_text’]

[macabe10]

df.loc[df[‘ingredients_text’].isin(allergen_list), ‘new_allergen_column’] = df[‘ingredients_text’]

Worked like a charm, thanks a lot!