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檔案寫入方法總結

​ 以下總結爬蟲中常用的檔案寫入方法。

(1)
with open('test.csv','w',encoding='utf-8',newline='') as csvfile:
	#設定列名
    fieldname = ['website','name']
    write = csv.DictWriter(csvfile,fieldnames=fieldname)
    #先將頭寫入表中
    write.writeheader()

    for result in results:
        # result是一個字典型別,依次取出我們的每一個值
        website =
result['website'] name = result['name'] #將我們的值一行一行的寫入到表中 write.writerow({'website':website,'name':name}) #列印我們的結果,注意和上面的寫入進行區分 print('website', website, 'name',name)
(2)
		  try:
                url = response.xpath('//[@id="form"]/m[2]/@href').extract_first(
) except: url = False try: world = response.xpath('//[@id="form"]/m[2]/text()').extract_first() except: world = False try: chinese = re.findall("排名:<em>(\d+)</em>", response.text)[0] except: chinese =
False #將以上三項分別寫入檔案中 row = [] row.append(url) row.append(world) row.append(chinese) #newline='',寫入的時候不生成新的行 out = open('result.csv', 'a', newline='') # 設定寫入模式,dialect='excel'寫入excel;dialect='csv',寫入csv csv_write = csv.writer(out, dialect='excel') # 寫入具體內容 csv_write.writerow(row)
(3)
#將獲取到的name和ID儲存在檔案中
fl = open('nameId.txt', 'w', encoding='utf-8')
fl.write('"'+'name'+'"')
fl.write(',')
fl.write('"'+'id'+'"')
fl.write('\n')
name = 'test'
id ='0001'
fl.write(name+","+id+'\n')