以下是Google App Engine中的模型:
class Rep(db.Model):
mAUTHOR = db.UserProperty(auto_current_user=True)
mUNIQUE = db.StringProperty()
mCOUNT = db.IntegerProperty()
mDATE = db.DateTimeProperty(auto_now=True)
mDATE0 = db.DateTimeProperty(auto_now_add=True)
mWEIGHT = db.FloatProperty()
所以,mCOUNT
是整数,mWEIGHT
是float。我这样计算物品的年龄:
但当我尝试这样的查询时:
QUERY = Rep.all()
QUERY.filter("mAUTHOR =", user)
QUERY.order("-mWEIGHT")
RESULTS = QUERY.fetch(10)
for result in RESULTS:
self.response.out.write("mUNIQUE: <b>%s</b> | "
"mWEIGHT: %f | "
"mCOUNT: %s | <br />"
% (result.mUNIQUE,
result.mWEIGHT,
# line 103
result.mCOUNT,
))
我在第103行得到一个TypeError
,它是
result.mCOUNT,
TypeError: a float is required
为什么mCOUNT是浮动的?顺便说一下,只有当该项不在数据存储中并且它是由if loop
的else
子句第一次写入时才会引发错误。在
你能帮我用正确的型号吗?谢谢你的帮助。在
-----------------------------------------------------
编辑
我刚刚注意到我有%f
作为mWEIGHT
的字符串格式,将其改为%s
似乎解决了这个问题(但我不知道为什么)。是因为mWEIGHT=None
?)公司名称:
for result in RESULTS:
self.response.out.write("mUNIQUE: <b>%s</b> | "
# changing %f to %s appears to solve the problem.
"mWEIGHT: %f | "
"mCOUNT: %s | <br />"
% (result.mUNIQUE,
result.mWEIGHT if result.mWEIGHT is not None else 0.0,
result.mWEIGHT,
result.mCOUNT,
))
以下是一些值:
mUNIQUE: A | mWEIGHT: 0.299954933969 | mCOUNT: 2 |
mUNIQUE: Z | mWEIGHT: 0.0 | mCOUNT: 1 | # With answer by TokenMacGuy
mUNIQUE: R | mWEIGHT: None | mCOUNT: 1 | # with %f changed to %s
mUNIQUE: P | mWEIGHT: None | mCOUNT: 1 | # with %f changed to %s
有什么建议可以把rep.mWEIGHT
添加到else
子句中?在
------------------------------------------------------------
整个代码如下:
K = []
s = self.request.get('sentence')
K.append(s)
K = f2.remove_empty(K[0].split('\r\n'))
UNIQUES = f2.f2(K)
COUNTS = f2.lcount(K, UNIQUES)
C_RESULT = "no results yet"
for i in range(len(UNIQUES)):
C_QUERY = Rep.all()
C_QUERY.filter("mAUTHOR =", user)
C_QUERY.filter("mUNIQUE =", UNIQUES[i])
C_RESULT = C_QUERY.fetch(1)
if C_RESULT:
rep = C_RESULT[0]
rep.mCOUNT+=COUNTS[i]
age1 = datetime.datetime.now() - rep.mDATE0
age_hour = float(age1.seconds) / 3600
rep.mWEIGHT = float((rep.mCOUNT - 1) / (age_hour + 2)**1.5)
self.response.out.write("<b>rep.UNIQUE: %s</b>: <br />"
# "rep.mCOUNT: %s <br />"
"rep.mWEIGHT: %s <br />"
# "C_RESULT: %s <br />"
# "rep: %s <br />"
# "utc_tuple: %s <br />"
# "mDATE0_epoch: %s <br />"
"rep.mDATE0: %s "
"age_hour: %s <br />"
#
% (rep.mUNIQUE,
# rep.mCOUNT,
rep.mWEIGHT,
# C_RESULT,
# rep,
# utc_tuple,
# mDATE0_epoch,
rep.mDATE0,
age_hour,
))
rep.put()
else:
rep = Rep()
rep.mCOUNT = COUNTS[i]
rep.mUNIQUE = UNIQUES[i]
rep.put()
self.response.out.write("<b>rep.UNIQUE: %s</b>: |"
"rep.mCOUNT: %s: <br />"
% (rep.mUNIQUE,
rep.mCOUNT,))
QUERY = Rep.all()
QUERY.filter("mAUTHOR =", user)
QUERY.order("-mWEIGHT")
RESULTS = QUERY.fetch(10)
for result in RESULTS:
self.response.out.write("mUNIQUE: <b>%s</b> | "
"mWEIGHT: %f | "
"mCOUNT: %s | <br />"
% (result.mUNIQUE,
result.mWEIGHT,
result.mCOUNT,
))
看起来你偶尔在设置
mWEIGHT
。换衣服怎么样到
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