Question

想知道如何在csv中为现有数字添加数字清单？例如，
如果我的csv列表看起来像：你好，2,11
再见，5,6 称呼，7,17
..................
如果我的清单看起来像：
[['hello'，'5'，'1']，['goodbye'，'12'，'8']， ['salutations'，'14，'9'] ...................]

我有写文件的基本纲要

with open("namesList.csv", "w") as f:
    writer = csv.writer(f)
    writer.writerows(ranking)

似乎无法弄清楚如何添加数字
非常感谢

最终清单理想情况如下：
你好，7,12 再见，17,14
致敬，21,26

Answer 1

您可以使用Pandas库在python中编写csv文件

dataframe = Dataframe.from_records(your_list)
dataframe.to_csv('directory/yourfile.csv')

Answer 2

l=[['hello','5','1'], ['goodbye', '12', '8'], ['salutations', '14','9']]
y=[]

# Read the csv, match first element in csv with that in list
# Creates a new list y, with the updated values
# While updating the sum, had to convert to integer as the numbers were in string format
with open("namesList.csv", "r") as fr:
    reader = csv.reader(fr)
    for line in reader:
        for x in l:
            if line[0] == x[0]:
                y.append([ line[0], int(x[1])+int(line[1]), int(x[2])+int(line[2]) ])

# Writes the values in temporary list to the same csv file
with open("namesList.csv", "w") as f:   
    writer = csv.writer(f)
    for i in y:
        writer.writerow(i)

假设

CSV包含指定格式的数据
所需的列表可用并且指定的格式相同（因为我对索引进行了硬编码）

将数字添加到csv文件python中

2 个答案: