[問題] 如何new一個自訂structure的array?
我有一個結構Greeting:
class Greeting(db.Model):
author = db.StringProperty()
content = db.StringProperty(multiline=True)
lonx = db.FloatProperty()
lony = db.FloatProperty()
lon = db.StringProperty()
因為GAE沒有辦法做兩個變數的不等式query
所以我將程式寫成
class MainPage(webapp.RequestHandler):
def get(self, page):
if(self.request.get('x') != ""):
#以lonx為query條件,得到符合條件的那些欄位
query = db.GqlQuery("SELECT * FROM Greeting where lonx >= :1 and
lonx <= :2 " , (float(self.request.get('x')) - 0.0001),
(float(self.request.get('x'))) + 0.0001)
else:
query = db.GqlQuery("SELECT * FROM Greeting where 1 = 2")
#取query中的前一千筆
name = query.fetch(1000,0)
#將name中,符合lony條件的存入filter
filter=[]
for location in name:
if location.lony>=float(self.request.get('y')) - 0.0001:
if location.lony<=float(self.request.get('y')) + 0.0001:
print location.content
filter = filter.extend(location)
self.response.clear()
self.response.out.write(template.render('gps.html',{'recName':filter,
'recContent':filter}))
但是卻會出現TypeError: 'Greeting' object is not iterable
請問有辦法能夠new一個Greeting型別的陣列嗎?
就是和name一樣型別
謝謝!!
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◆ From: 140.112.4.185
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09/29 13:25, , 1F
09/29 13:25, 1F
改成append會產生另外一個錯誤
AttributeError: 'NoneType' object has no attribute 'append'
※ 編輯: amorr 來自: 140.112.4.185 (09/29 13:29)
※ 編輯: amorr 來自: 140.112.4.185 (09/29 13:30)
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09/29 13:47, , 2F
09/29 13:47, 2F
→
09/29 13:47, , 3F
09/29 13:47, 3F
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