Map 一列中的数值到另一列中的分类值 pandas

Question

I have a dataframe with numerical values

score
16.0
49.0
55.0
65.0
77.0
89.0
98.0

I want to create another column in the same dataframe with categorical values based on the numerical values.

score	names
16.0	low
49.0	low
55.0	low
65.0	avg
77.0	avg
89.0	high
98.0	very high

Answer 1

scores = df['score'].tolist()
names = []
for i in range(len(scores)):
    if scores[i] < 60.0:
        names.append('low')
    elif scores[i] < 80.0:
        names.append('avg')
    elif scores[i] < 90.0:
        names.append('high')
    else:
        names.append('very high')
df['names'] = names