Python：在while循环中组合for循环并迭代数据中的行

Question

我想迭代数据行并在达到条件后打印最后一行。 我的代码看起来像这样

D_sum = 4.39e-05
count = 0
while D_sum < 1:
   for row in df.iterrows():
       count += 1
       D_sum += D_sum
       print('count', count)
       print('D_sum', D_sum)
       print('row', row)
       break  # When i write break the loop is executing correct but, its not printing final row. Its printing first row of data. 

如果我不写 Break，循环将在某些迭代后继续并结束。

我试着写这段代码

count = 0
flag = True
while flag:
    for row in df.iterrows():
        count += 1
        D_sum += (df[['Di']].sum()).values
        print('count:', count)
        print('D_sum', D_sum)
        print(row)
if D_sum == 1:
   flag = False

但这也会持续到某些迭代（无限循环）请帮助我更正 python 中的代码

Answer 1

D_sum = 4.39e-05
count = 0
for row in df.iterrows():
    count += 1
    D_sum += D_sum
    print('count', count)
    print('D_sum', D_sum)
    # Check your condition here 
    if D_sum >= 1:
       print('row', row)
       break