Python3避免在csv文件末尾加引號和多余的行

Question

我試圖根據先前創建和連接的列表內容創建CSV文件。 關鍵是我的所有行記錄都在每行的開頭和結尾都用雙引號引起來。 另外，在文件末尾，我得到了一條額外的白線。

碼：

with open('/tmp/'+filename,"w", newline='') as output:
            writer = csv.writer(output)
            for item in update_records:
                row = '{},{},{}'.format(item['field1'],item['field2'],item['field3'])
                #print(row)
                writer.writerow([row])               

        output.close()

電流輸出：

我努力了：

writer = csv.writer(output, quotechar='', quoting=csv.QUOTE_MINIMAL)

但是我收到如下錯誤：

如果啟用了報價，則必須設置quotechar

非常感謝您的支持。

Answer 1

這里是使用DictWriter的答案，但是基於數據結構的大量猜測工作。 甚至有更簡單的編寫方法，例如，將它們作為字典列表。

import csv

update_records = [
    {
        "field1": "field1",
        "field2": "en",
        "field3": "field3"
    },
    {
        "field1": "field1",
        "field2": "de",
        "field3": "field3"
    }
]

filename = "test.csv"

with open('/tmp/'+filename,"w", newline='') as output:
    # Define header, needed even if not written when using DictWriter
    header = ["field1", "field2", "field3"]
    writer = csv.DictWriter(output, fieldnames=header)
    # Optional write the header
    # writer.writeheader()
    for item in update_records:
        row = {}
        # Only provide the fields 1 to 1 that are present in the header.
        # There are plenty of cooler ways to do this, but hope this is clearer.
        for head in header:
            row[head] = item[head]
        # print(row)
        writer.writerow(row)

輸出是這樣的（/tmp/test.csv）（末尾有一個空行，但是不知道如何將其顯示為代碼的一部分，因此添加了EOF）：

field1,en,field3
field1,de,field3

EOF

Answer 2

writerow應該將字段列表作為參數：

with open('/tmp/'+filename,"w", newline='') as output:
    writer = csv.writer(output)
    for item in update_records:
        row = [item['field1'],item['field2'],item['field3']]
        #print(row)
        writer.writerow(row)