Pandas引入：import pandas as pd常也需import numpy as npcreate df：df = pd.DataFrame(…)selection：选列：df[‘A’]选行：df[0:3]多维：df.loc[:, [‘A’, ‘B’]]或df.iloc[:, 0:2]选值：df.at[2,‘A’]或者df.iloc[2,0]处理空值：df.dropna df.fillnaapply funcs：df.apply(lambda)SQL-like join: pd.merge(A, B, on="…")文件：df.to_csv("…") pd.read_csv("…")列表项目