问题

import csv

with open('timetable.csv', newline='') as csvfile:
    reader = csv.reader(csvfile)
    for row in reader:
        rowId = row[0]
        pmp = row[1]

        for item in row:
            if item != "" and "/" in item:
                class_name = item
                editRow = int(row[0]) - 1  # Convert row[0] to an integer to perform the subtraction

                # Update the cell in the row above with the class_name
                if editRow >= 0:
                    reader[editRow] = [rowId, pmp, class_name]

请注意，代码的修改可能还需要其他更多的步骤和逻辑以达到您期望的结果。上面的代码片段只是您提供的代码的一部分，处理了从第二行到第一行的数据复制。您可能需要添加更多的逻辑来处理其他方面的问题和格式化输出。

import csv
with open('timetable.csv', newline='') as csvfile:
    reader = csv.reader(csvfile)
    for row in reader:
        rowId = row[0]
        pmp = row[1]

        for item in row:
            if item != "" and "/" in item:
                class = item
                editRow = row[0] - 1

-------------------------------------------------------
1 | name | ----- | class | ----- |
2 |      |       | class_id / class_name |       |
-------------------------------------------------------

-------------------------------------------------------
1 | name | ----- | class / class_id / class_name | ----- |
2 |      |       | class_id / class_name |       |
-------------------------------------------------------

答案1

得分: 1

以下是您要求的翻译部分：

import csv
with open('timetable.csv', newline='') as csvfile:
    reader = csv.reader(csvfile, delimiter="|")
    all_rows = []
    for row in reader:
        # skip lines containing only hyphens 
        if len(row) == 1:
            all_rows.append(row)
            continue

        rowId = row[0]
        pmp = row[1]

        for col_num, item in enumerate(row):
            if all_rows and len(all_rows[-1]) > 1 and "/" in item:
                prev_row = all_rows[-1]
                prev_row[col_num] += " / " + item 

        all_rows.append(row)

将其写回到具有正确分隔符的文件将生成所需的输出：

-------------------------------------------------------
1 | name | ----- | class  /  class_id / class_name | ----- |
2 |      |       | class_id / class_name |       |
-------------------------------------------------------

在线尝试

<details>
<summary>英文:</summary>

You can keep track of all previously processed rows in a variable `all_rows`. Then, the previous row is accessible as `all_rows[-1]`:

import csv
with open('timetable.csv', newline='') as csvfile:
reader = csv.reader(csvfile, delimiter="|")
all_rows = []
for row in reader:
# skip lines containing only hyphens
if len(row) == 1:
all_rows.append(row)
continue

    rowId = row[0]
    pmp = row[1]

    for col_num, item in enumerate(row):
        if all_rows and len(all_rows[-1]) > 1 and "/" in item:
            prev_row = all_rows[-1]
            prev_row[col_num] += " / " + item 

    all_rows.append(row)

Writing this back to a file with the correct delimiter gives your desired output:
```none
-------------------------------------------------------
1 | name | ----- | class  /  class_id / class_name | ----- |
2 |      |       | class_id / class_name |       |
-------------------------------------------------------

Try it online