python - Pyramid 响应显示在控制台日志中，而不是页面上

Question

我正在尝试制作我的第一个 Pyramid 应用程序，我想我在响应方面遇到了一个基本的问题。

我有一个元组列表，我想将它们打印到网页上，但网页是空白的，列表出现在终端窗口中。整个应用:

from wsgiref.simple_server import make_server
from pyramid.config import Configurator
from pyramid.response import Response
from photoCollect import photoCollect

def printPhotos(request):
  photoTable = photoCollect()
  return Response(photoTable)

if __name__ == '__main__':
    config = Configurator()
    config.add_route('productlist','/productlist')
    config.add_view(printPhotos, route_name='productlist')
    app = config.make_wsgi_app()
    server = make_server('0.0.0.0', 8080, app)
    server.serve_forever()

和photoCollect定义为:

import urllib
import pandas as pd

def photoCollect():
  # pull photo directory
  mypath = "http://gwynniebee.com/photos"
  mylines = urllib.urlopen(mypath).readlines()

  # strip down web page to retain just photo names
  photonames = []
  for item in mylines:
    if ".jpg" in item:
      k = item.replace('<',' ')
      splitItem = k.split(" ")
      for x in splitItem:
        if "=" not in x and ".jpg" in x:
          photonames.append(x)

  photoFrame = pd.DataFrame(photonames, columns=['name'])

  # break photo names into vendor-color-order
  photoFrame['name2'] = photoFrame['name'].apply(lambda x: x.replace('.jpg',''))
  s = photoFrame['name2'].apply(lambda x: pd.Series(x.split('-')))

  # concat vendor-color into style
  s['style'] = s[0] + "-" + s[1]
  s['order'] = s[2]
  photoFrame = photoFrame.join(s)

  # find first photo for each style and recreate photo name
  styleMin = photoFrame.groupby('style')['order'].min()
  photoName = pd.DataFrame(styleMin)
  photoName = photoName.reset_index()
  photoName['name'] = photoName['style'] + "-" + photoName['order']+".jpg"

  # generate list to send to web
  webList = pd.DataFrame("http://gwynniebee.com/photos/"+ photoName['name'])
  webList['style'] = photoName['style']

  webList = webList.set_index('name')
  photoList = list(webList.itertuples()) 

  print photoList

如何让列表显示在网页上？我很困惑为什么响应显示在日志中而不是页面上。

Answer 1

photoCollect() 方法打印输出:

print photoList

打印将数据写入sys.stdout，在运行 WSGI 服务器时重定向到日志。

您想返回photoList:

return photoList

如果没有 return 语句，默认返回值为 None，并且 Response(None) 会生成一个空页面。

通过 return，photoCollect() 函数的调用者实际上收到了该列表。