[TOC] # 查看数据的内存占用 ~~~ df = pd.DataFrame(np.random.rand(6,4), index=['one', 'two', 'three', 'four', 'five', 'six'], columns = pd.Index(['A', 'B', 'C', 'D'], name='Genus')) ~~~ 输出 ~~~ <class 'pandas.core.frame.DataFrame'> Index: 6 entries, one to six Data columns (total 4 columns): A 6 non-null float64 B 6 non-null float64 C 6 non-null float64 D 6 non-null float64 dtypes: float64(4) memory usage: 668.0 bytes ~~~