我不想使用-o命令导出CSV,而是通过我的零工脚本创建它。我的CSV文件确实与项目导出了很好的导出,但我没有标题。我想有一个与我的物品钥匙相对应的标头。
- 我如何用项目键修复标头?
我在几个论坛和教程中看到了标题必须在pipelines.py中定义。我尝试了使用open_spider的不同解决方案,但它不起作用。
这是我的pipelines.py代码:
class CsvWriterPipeline(object):
def __init__(self):
self.csvwriter = csv.writer(open(fichier1, 'wb'))
def open_spider(self, spider):
header_keys = item.fields.keys()
self.csvwriter.writerow(header_keys)
def process_item(self, item, spider):
self.csvwriter.writerow(
[item['nom_course'][0],
item['nom_evenement'][0],
item['distance'][0],
item['date'][0],
item['contact_1'][0],
item['contact_2'][0],
item['organisateur'][0],
item['site_internet_evenement'][0],
item['description'][0],
item['prix'][0],
item['nb_participant'][0],
item['URL_Even'][0],
item['pays'][0],
item['region'][0],
item['ville'][0],
item['tag'][0]])
return item
settings.py
BOT_NAME = 'AHOTU_V2'
SPIDER_MODULES = ['AHOTU_V2.spiders']
NEWSPIDER_MODULE = 'AHOTU_V2.spiders'
ITEM_PIPELINES = {
'AHOTU_V2.pipelines.CsvWriterPipeline': 800,
}
ROBOTSTXT_OBEY = True
打开蜘蛛时,根本没有项目。因此,以下功能不起作用
def open_spider(self, spider):
header_keys = item.fields.keys()
self.csvwriter.writerow(header_keys)
您宁愿做的是有一个字段来检查标题是否编写
class CsvWriterPipeline(object):
def __init__(self):
self.csvwriter = None
self.headers_written = False
def open_spider(self, spider):
self.csvwriter = csv.writer(open(fichier1, 'wb'))
def process_item(self, item, spider):
if not self.headers_written:
header_keys = item.fields.keys()
self.csvwriter.writerow(header_keys)
self.headers_written = True
self.csvwriter.writerow(
[item['nom_course'][0],
item['nom_evenement'][0],
item['distance'][0],
item['date'][0],
item['contact_1'][0],
item['contact_2'][0],
item['organisateur'][0],
item['site_internet_evenement'][0],
item['description'][0],
item['prix'][0],
item['nb_participant'][0],
item['URL_Even'][0],
item['pays'][0],
item['region'][0],
item['ville'][0],
item['tag'][0]])
return item