series.map() 映射值

官方文档：http://pandas.pydata.org/pandas-docs/stable/generated/pandas.Series.map.html

Series.

map

( arg,  na_action=None ) [source]

Map values of Series using input correspondence (which can be a dict, Series, or function)

可传入字典, series , 函数

data['Sex_type']=data.Sex.map({'male':0,'female':1})