感觉还是写的太复杂了，公司另一个人用Stata写的就特别简单。

from openpyxl import load_workbook
import random

from openpyxl import Workbook

def F_generate(l,m,n):
    # l, m : row index
    #n: number of faculty
    
    wb_in = load_workbook(filename='/Users/Huizhi/Downloads/Sampling/sample_selection_in.xlsx', read_only=True)
    wb_out = load_workbook(filename = '/Users/Huizhi/Downloads/Sampling/sample_selection_out.xlsx')
    ws_in = wb_in['Tabelle1']
    ws_out = wb_out['Sheet1']
    Uni,Fakultaet,ins,number = list(),list(),list(),list()
    i=0
    for row in ws_in.rows:

        i+=1

        if i>=l and i<=m:
            Uni.append(row[0].value)
            Fakultaet.append(row[1].value)
            ins.append(row[2].value)
            number.append(row[3].value)
        else :
            continue
    
    
    F = random.sample(set(Fakultaet),n)



    choo,choo1,choo2,choo3,choo4 = [],[],[],[],[]
    l = []

    functions = {'F0': lambda x: choo1.append(x),
                 'F1': lambda x: choo2.append(x),
                 'F2': lambda x: choo3.append(x),
                 'F3': lambda x: choo4.append(x),
                 }

    z = zip(Uni,Fakultaet,ins,number)
    for i in z:
        l.append(i)

    for i in range(len(l)):
        if l[i][1] in F:
            n = F.index(l[i][1])
            func = functions['F'+str(n)]
            func(l[i])


    choo1 = list(set(choo1))
    choo.append(choo1)
    choo2 = list(set(choo2))
    choo.append(choo2)
    choo3 = list(set(choo3))
    choo.append(choo3)
    choo4 = list(set(choo4))
    choo.append(choo4)
    return choo

choo = F_generate(305,340,4)


choo

print(choo[0])
ch = choo[0]
x = random.choice(ch)
# ws_out.append(x)
# wb_out.save("/Users/Huizhi/Downloads/Sampling/sample_selection_out.xlsx")
print(x)
summ = int(x[3])
print(summ)   

while summ< 5:
    if ch:
        print(ch)
        ch.remove(x)
        y = random.choice(ch)
        print(y)
#         ws_out.append(y)
#         wb_out.save("/Users/Huizhi/Downloads/Sampling/sample_selection_out.xlsx")
        summ+=int(y[3])
        x= y
print(summ)