Python大佬用数据带你解读京东上最受欢迎的面包

def disguiser():
   
构建解析详情页的代理
   
try:
req = request.Request( http://www.agent.cn/xdaili-api//greatRecharge/getGreatIp?spiderId=8f75fb741de34cfb95adf347910db7a9&orderno=YZ20191169208Yi1jmu&returnType=2&count=1 )
resp = request.urlopen(req)
jsonIP = resp.read().decode()
jsonIP = re.sub(   ,  ,jsonIP)
ipList = re.findall( "ip":"(.*?)" ,jsonIP)
portList = re.findall( "port":"(.*?)" ,jsonIP)
value = list(map(lambda x,y : x +  :  + y,ipList, portList))
key = [ http ]
ipDict = {key[index] : value[index] for index in range(len(key))}
print(ipDict)
# 1. 使用ProxyHandler，传入代理构建一个handler
handler = request.ProxyHandler(ipDict) # key: http/https val: ip:port
# 2. 使用上面创建的handler构建一个opener
opener = request.build_opener(handler)
print(opener)
except:
time.sleep(6)
req = request.Request( http://www.agent.cn/xdaili-api//greatRecharge/getGreatIp?spiderId=8f75fb741de34cfb95adf347910db7a9&orderno=YZ20191169208Yi1jmu&returnType=2&count=1 )
resp = request.urlopen(req)
jsonIP = resp.read().decode()
jsonIP = re.sub(   ,  ,jsonIP)
ipList = re.findall( "ip":"(.*?)" ,jsonIP)
portList = re.findall( "port":"(.*?)" ,jsonIP)
value = list(map(lambda x,y : x +  :  + y,ipList, portList))
key = [ http ]
ipDict = {key[index] : value[index] for index in range(len(key))}
print(ipDict)
# 1. 使用ProxyHandler，传入代理构建一个handler
handler = request.ProxyHandler(ipDict) # key: http/https val: ip:port
# 2. 使用上面创建的handler构建一个opener
opener = request.build_opener(handler)
return opener

def parser(pageQueue, uaPool, priceRequestDoc, PRICEBASEURL, detailRequestDoc, open):
   
解析详情页的内容
   
detailUrl = pageQueue.get()[1]
print(detailUrl)
# 价格
PRICEURL = PRICEBASEURL + re.search( d+ ,detailUrl).group()
priceRequestDoc = re.sub(r   ,  ,priceRequestDoc)
headers_for_price = dict(re.findall( ([-wd]*?):(.*) ,priceRequestDoc))
headers_for_price.update(uaPool[random.randint(0,len(uaPool)-1)]) # 获取商品价格信息请求的headers信息
req = request.Request(PRICEURL, headers = headers_for_price)
resp = open(req) #第一次响应
print(PRICEURL, 商品价格页请求响应码：,resp.getcode())
if resp.getcode() == 200:
info = resp.read().decode()
elif SERVER_ERROR_MIN <= response.status_code < SERVER_ERROR_MAX:
for i in range(5):
time.sleep(i**i) #可以继续优化,第一次1秒,第二次10秒,第三次100秒...
resp = open(req)
if resp.getcode() == 200:
break
elif SERVER_ERROR_MIN <= response.status_code < SERVER_ERROR_MAX:
if response.status_code == 404:
print( page not found )
elif response.status_code == 403:
print( have no right )
else:
pass
info = json.loads(info)
item_price = info[0][ p ]

# 名称 品牌 是否含糖 保质期 配料 包装 商品产地...
detailRequestDoc = re.sub(r   ,  ,detailRequestDoc)
headers_for_detail = dict(re.findall( ([-wd:]*):(.*) ,detailRequestDoc))
headers_for_detail.update(uaPool[random.randint(0,9)]) # 获取商品价格信息请求的headers信息
req = request.Request(detailUrl, headers = headers_for_detail)
resp = open(req) # 第二个响应
print(detailUrl, 详情页请求响应：,resp.getcode())
if resp.getcode() == 200:
pass
elif SERVER_ERROR_MIN <= response.status_code < SERVER_ERROR_MAX:
for i in range(5):
time.sleep(i**i) #可以继续优化,第一次1秒,第二次10秒,第三次100秒...
resp = open(req)
if resp.getcode() == 200:
break
elif SERVER_ERROR_MIN <= response.status_code < SERVER_ERROR_MAX:
if response.status_code == 404:
print(detailUrl, page not found )
elif response.status_code == 403:
print(detailUrl, have no right )
else:
pass
parser = etree.HTMLParser(encoding =  gbk )
html = etree.parse(resp, parser = parser)
print(html)
elements = html.xpath("//ul[@class= parameter2 p-parameter-list ]//text() | //dl[@class= clearfix ]//text()")
detailInfo = list(filter(lambda msg : len(msg.strip()) > 0 and msg, elements))
detailInfo = ( # ).join(detailInfo)
try:
item_name = re.search( 商品名称：(.*?)# ,detailInfo).group(1)
except AttributeError:
# print( 商品没有 item_name 信息 )
item_name =  n
try:
item_id = re.search( d+ ,detailUrl).group()
except AttributeError:
# print( 商品没有 item_id 信息 )
item_id =  n
# 大商品名称
elementTitle = html.xpath("//title//text()")[0]
elementTitle = elementTitle.strip()
item_fullName = re.search( (【.*】)*(.*)?【 ,elementTitle).group(2)
# 品牌
elementBrand = html.xpath("//*[@id= crumb-wrap ]/div/div[1]/div[7]/div/div/div[1]/a/text()")
elementBrand = list(filter(lambda msg : len(msg.strip()) > 0 and msg, elementBrand))
try:
item_brand = elementBrand[0]
except IndexError:
item_brand =  npl
yield {
 item_id :item_id,
 item_fullName :item_fullName,
 item_name :item_name,
 item_price :item_price,
 item_brand :item_brand,
 gross_weight :gross_weight,
 item_origin :item_origin,
 item_certification :item_certification,
 processing_technology :processing_technology,
 packing_unit :packing_unit,
 is_suger :is_suger
}