for循环和if语句的Python复杂问题

Question

由于我是编程新手，因此需要您的帮助，因此我的知识仅限于出于自己的兴趣而学到的东西。 基本上，我有一个包含以下数据的Excel文件：

我要对此执行以下逻辑步骤。

1. 单元格C1将标记为“ X”，即X=ws.['C1']。 Y将= X-5 ＆print('X=' + str(X))

2. 检查单元格C2是否小于或等于Y;
   一世。如果是，则依次为Y=Cell ['C2']和print('Y=' +str(Y)) 现在X将是下一个单元格，即X = ws。['C3']。 Y =新的X-5。 ＆print('X=' + str(X))。 再次检查第2点中提到的相同条件（循环）。

   ii。如果否，即C2> Y，则Y = Cell [C2] -5。 再次检查第2点中提到的情况。

我正在使用以下代码，我知道这是错误的。

import openpyxl
from openpyxl import load_workbook
import datetime
wb = load_workbook('D:/Python/data.xlsx')
ws = wb.active
X=float(ws["C2"].value)
print('X=' +str(X))
Y=float(X - 5)

for row in range(2, ws.max_row + 1):
    cell=float(ws['C' +str(row)].value)
    if cell < Y:
        Y=cell
        print('Y='+str(Y))

    else:
        Y=cell-5
        X=float(ws['C' +str(row)+1].value)
        print('X=' +str(X))

Answer 1

from openpyxl import load_workbook

work_book = load_workbook("62357026/source.xlsx")
work_sheet = work_book.active

buying_price = work_sheet["C2"].value  # Assuming all data are integer.
loss_threshold = buying_price - 5

print(f"Price = {buying_price}\nStarting Step 2:")

for index, row in enumerate(work_sheet.rows):
    a, b, c = row  # (<Cell 'Sheet1'.Ax>, <Cell 'Sheet1'.Bx>, <Cell 'Sheet1'.Cx>)

    print(f'\nrow {index}: {a.coordinate} {b.coordinate} {c.coordinate}')
    print(f'row {index}: {a.value} {b.value} {c.value}')

    price = row[2].value

    if price <= loss_threshold:
        loss_threshold = price
        print(f"threshold = {loss_threshold}")

    else:
        buying_price = price
        loss_threshold = buying_price - 5
        print(f"threshold = {loss_threshold}")

结果：

Price = 81
Starting Step 2:

row 0: A1 B1 C1
row 0: Mango Monday 31
threshold = 31

row 1: A2 B2 C2
row 1: Mango Tuesday 81
threshold = 76

row 2: A3 B3 C3
row 2: Mango Wednesday 89
threshold = 84

row 3: A4 B4 C4
row 3: Mango Thursday 84
threshold = 84

row 4: A5 B5 C5
row 4: Mango Friday 22
threshold = 22

row 5: A6 B6 C6
row 5: Mango Saturday 56
threshold = 51

row 6: A7 B7 C7
row 6: Mango Sunday 53
threshold = 48

row 7: A8 B8 C8
row 7: Mango Monday 94
threshold = 89

Process finished with exit code 0