Pandas DataFrame 操作：创建 DataFrame 并查看数据行列数

import pandas as pd import numpy as np

data = {'订单号':['D001','D002','D003','D004'], '设备 ID':['E1','E2','E3','E4'], '购买数量':[1,3,7,9], '应付金额':[3.5,4.5,5,np.nan], '商品名称':['可乐','营养快线','八宝粥','酸奶'], '支付时间':['2020-1-2','2020-2-3','2020-3-4','2020-4-5'], '地点':['A','B','C','D']}

df = pd.DataFrame(data)

print(df.shape) # 输出数据行列数，(4, 7)