python pandas [rename, map, merge] 的简明使用_pandas

列重命名：python.pandas.rename
df.rename(columns={'A':'a', 'B':'b', 'C':'c'}, inplace = True)

样本数据映射：python.pandas.map
boolean_map = {True:0, False:1}

df['boolean_column'].map(boolean_map)

合并两个Dataframe：python.pandas.merge
merged_df = pd.merge(df1,df2,on='key',how='left')
how = [‘inner’(default), ‘outer’, ‘left’, ‘right]