创建
import numpy as np import pandas as pd #创建方法一、一维数组或者列表创建 a = [1,2,3,4] #1.1不指定index data = pd.Series(a) print(data) #1.2指定index data = pd.Series(a,index=['a','b','c','d']) print(data) #1.3使用list创建index data = pd.Series(a, index=list('abcd')) print(data) print('-'*50) #创建方法二、使用字典创建 #2.1关键字就是index b = {'beijing':3000,'tianjin':2000,'shijiazhuang':20} data = pd.Series(b) print(data) #2.2index是字典关键字的子集,那么只输出子集 data = pd.Series(b,index = ['beijing','shijiazhuang']) print(data) #2.2index不是字典关键字的子集,非子集部分输出NaN data = pd.Series(b,index = ['beijing','henan']) print(data) print('-'*50) #创建方法三:标量创建 data = pd.Series(10, index = list('abcd')) print(data)