dataframe筛选出某列包含某值的行[Series.str.contains][2023-06-30]

举例：获取所有姓wang 的同学：

import pandas as pd
 df = pd.DataFrame([['jerry wang', '11'],['mary wang', '12'], ['tom king', '13']], columns=['name', 'age'])
 df = df[df['name'].str.contains('wang')]