自学Python--Day2

# 构建索引，分组，分批次data= np.random.randn(6,2)outside= ['G1','G1','G1','G2','G2','G2']inside= [1,2,3,1,2,3]index = list(zip(outside,inside))index = pd.MultiIndex.from_tuples(index)df= pd.DataFrame(data,index= index,columns=('A','B'))df.index.names=['Group','Sample']

#筛选sample1表达量大于50的基因df[df['Sample1']>50]

#排序df.sort_values(by="Sample3",ascending= False)