ValueError: iAt based indexing can only have integer indexers

Пытаюсь заполнить значениями колонку датафрейма и выбивает ошибку. Помогите исправить

for coord in all_coords:
    for spec in all_spec:
        result_df[str(coord) + str(spec)]=0

result_df.head()



def get_full_proba(i):
    print(i)
    counter = 1
    for coord_idx, coord in enumerate(all_coords):
        for spec_idx, spec in enumerate(all_spec):
            coords_proba = spec_proba_by_coords_df.iat[i, coord_idx+3]
            spec_proba = spec_proba_df.iat[i, spec_idx+3]
            result_df.iat[i, counter]=float(coords_proba)*float(spec_proba)
            counter += 1


result_df.copy()[0:1].swifter.apply(lambda row: get_full_proba(row), axis=1)

ValueError: iAt based indexing can only have integer indexers