Series选择和过滤

格式:series[(判断条件1)&(判断条件2)|(判断条件3)] 
只要返回值是bool型就可用做筛选:series[bool]

课上练习:

求筛选以'张'开头的序列

s=Series(["张3","张4","王5","赵6"],index=['a','b','c','d'])

In:s.str.startswith("张") 

Out:

a    张3
b    张4
dtype: object

#startswith中间有个s,startswith中间有个s,startswith中间有个s