python-3.x - 将 csv.DictReader 转换为 CSV 文件

Question

我有一个名为 reader 的 csv.DictReader:

reader = csv.DictReader(csvfile())    
for row in reader:                   
    print(row)

给我以下输出:

{'field1': '23.10', 'field2': '48.70', 'entry_id': '18', 'created_at': '2017-09-10 09:21:43 UTC'}
{'field1': '23.10', 'field2': '48.30', 'entry_id': '19', 'created_at': '2017-09-10 10:20:35 UTC'}
{'field1': '23.00', 'field2': '48.50', 'entry_id': '20', 'created_at': '2017-09-10 11:19:29 UTC'}

我正在尝试将此 DictReader 元素写入 csv 文件。分隔符应为 \t，输出应如下所示:

created_at    entry_id   field1    field2
2017-09-10 09:21:43 UTC    18   23.10   48.70
2017-09-10 10:20:35 UTC    19   23.10   48.70

我尝试了以下方法:

with open(Write_File, 'w') as csv_file:                                                                 
    writer = csv.writer(csv_file,delimiter="\t", dialect="excel-tav")
    for row in reader:                                                                         
        writer.writerow(row)

没有结果，我尝试理解 DictWriter 模块，但没有得到所需的输出。

Answer 1

尝试使用csv.DictWriter。

with open('output_file.csv', 'w', newline='') as csv_file:
    fieldnames = ['created_at', 'entry_id', 'field1', 'field2']
    writer = csv.DictWriter(csv_file, fieldnames, delimiter='\t')
    writer.writeheader()
    for row in reader:
        writer.writerow(row)