Python -按列导入csv文件和组号

import csv
from itertools import groupby

with open('file.csv', 'r') as file:
    reader = csv.reader(file)
    data = list(reader)

column_index = 0  # 指定要按照哪一列进行分组
data.sort(key=lambda x: x[column_index])  # 按照指定列进行排序
groups = groupby(data, key=lambda x: x[column_index])  # 按照指定列进行分组

for key, group in groups:
    print(f"组号: {key}")
    for row in group:
        print(row)
    print()

import csv
from itertools import groupby

with open('file.csv', 'r') as file:
    reader = csv.reader(file)
    data = list(reader)

column_index = 0  # 指定要按照哪一列进行分组
data.sort(key=lambda x: x[column_index])  # 按照指定列进行排序
groups = groupby(data, key=lambda x: x[column_index])  # 按照指定列进行分组

for key, group in groups:
    print(f"组号: {key}")
    for row in group:
        print(row)
    print()