在pandas数据帧的dict行中新建count number of elem列

import pandas as pd

data_dict = {'A': [1, 2, 3], 'B': [4, 5, 6], 'C': [7, 8, 9]}
df = pd.DataFrame.from_dict(data_dict)

df['count number of elem'] = df.apply(lambda row: len(row), axis=1)

print(df)

import pandas as pd

data_dict = {'A': [1, 2, 3], 'B': [4, 5, 6], 'C': [7, 8, 9]}
df = pd.DataFrame.from_dict(data_dict)

df['count number of elem'] = df.apply(lambda row: len(row), axis=1)

print(df)