我正在尝试使用Python在Google App Engine中编写我的第一个应用程序。这里是应用程序的链接：http://contractpy.appspot.com/ - 它只是一个实验性应用程序。整个代码如下。
但是我收到了这个错误（在日志中显示）：
(...) line 229, in post "owner":owner})
TypeError: not enough arguments for format string
第229行在if块中：
if (resident_name and valid_resident(resident_name)) \
and (user_SSN and valid_SSN(user_SSN)) \
and ((not user_email) or (user_email and valid_email(user_email))):
self.redirect('/welcome?resident=%s&nacionality=%s?SSN=%s?driverLicense=%s?email=%s?witness =%s?owner=%s' % {"resident":resident_name,
"nacionality":user_nacionality,
"SSN":user_SSN,
"driverLicense":user_driverLicense,
"email":user_email,
"witness ":witness ,
"owner":owner})
更具体地说，就是这一行：
"owner":owner})
我尝试进行更改，阅读类似的awnswers，但没有任何效果。 有人可以找出导致此错误的原因吗？ 在此先感谢您的帮助！
# -*- coding: utf-8 -*-
# -*- coding: utf-8 -*-
#!/usr/bin/env python
#
# Copyright 2007 Google Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
import webapp2
form = """
<html>
<head>
<title>Sign Up</title>
<style type="text/css">
.label {text-align: right}
.error {color: red}
</style>
</head>
<body>
<h2>Signup</h2>
<form method="post">
<table>
<tr>
<td class="label">
resident
</td>
<td>
<input type="text" name="resident" value= "%(resident)s">
</td>
<td class="error"> %(resident_error)s
</td>
</tr>
<tr>
<td class="label">
nacionality
</td>
<td>
<input type="text" name="nacionality" value= " ">
</td>
</tr>
<tr>
<td class="label">
License
</td>
<td>
<input type="text" name="driverLicense" value="">
</td>
</tr>
<tr>
<td class="label">
SSN
</td>
<td>
<input type="text" name="SSN" value="%(SSN)s">
</td>
<td class="error"> %(SSN_error)s
</td>
</tr>
<tr>
<td class="label">
Email (optional)
</td>
<td>
<input type="text" name="email" value="%(email)s">
</td>
<td class="error"> %(email_error)s
</td>
</tr>
</table>
<br>
<td class="label">
Contract Type
<select name = "contractType">
<option>House Rental Contract</option>
<option>Car Rental Contract</option>
<option>Other</option>
</select>
</td>
<br>
<br>
<br>
owner
<select name = "owner">
<option>House owner</option>
<option>Car owner</option>
<option>Other owner</option>
</select>
<br>
<br>
<br>
Witness
<select name = "witness">
<option>Carl Sagan</option>
<option>Mahatma Gandhi</option>
</select>
<br>
<br>
<input type="submit">
</form>
</body>
</html>
"""
welcome = """
<html>
<head>
<title>Unit 2 Signup</title>
</head>
<body>
%(contractType)s
In consideration of the agreements of the Resident(s), known as: %(resident)s The owner hereby rents them the dwelling located at %(residentAdress)s, for the period commencing on the %(dateStarts)s, and monthly thereafter until the last day of %(dateEnds)s, at which time this Agreement is terminated. Resident(s), in consideration of owners permitting them to occupy the above property, hereby agrees to the following terms:
RENT: To pay as rental the sum of $ (rentalSum) per month, due and payable in advance from the first day of every month. Failure to pay rent when due will result in the owner taking immediate legal action to evict the Resident from the premises and seize the security deposit.
LATE FEE: Rent received after the first of the month will be subject to a late fee of 10% plus (3.00) dollars per day.
ACCEPTED THIS (dateContract), at (localContract).
___________________________________________________
%(resident)s - Resident
___________________________________________________
%(owner)s – owner
___________________________________________________
%(witness)s – Witness
</body>
</html>
"""
import re
USER_RE = re.compile(r"^[a-zA-Z0-9_-]{3,20}$")
def valid_resident(resident):
return USER_RE.match(resident)
PASS_RE = re.compile(r"^.{3,20}$")
def valid_SSN(SSN):
return PASS_RE.match(SSN)
EMAIL_RE = re.compile(r"^[\S]+@[\S]+\.[\S]+$")
def valid_email(email):
return EMAIL_RE.match(email)
def escape_html(s):
for (i,o) in (("&","&"), (">",">"), ("<","<"), ('"','"')):
s = s.replace(i,o)
return s
import time
import datetime
def dateToday():
today = datetime.datetime.today()
todayDay = str(today.day)
todayMonth = str(today.month)
monthExt = {'1':' January ', '2':'February', '3':' March ', '4':'April', '5':'May', '6':'June', '7 ':' July ', '8':'August', '9':'September', '10':'October', '11':'November ', '12':'December'}
todayYear = str(today.year)
return(todayDay + ' of ' + monthExtenso[todaymonth] + ' of ' + todayYear)
class MainHandler(webapp2.RequestHandler):
def get(self):
self.response.out.write(form %{"resident": "",
"SSN": "",
"driverLicense": "",
"email":"",
"resident_error": "",
"SSN_error": "",
"driverLicense_error": "",
"email_error": ""})
def write_form(self, text_write):
self.response.out.write(text_write)
def post(self):
resident_name = self.request.get(escape_html("resident"))
user_nacionality = self.request.get("nacionality")
user_SSN = self.request.get(escape_html('SSN'))
user_email = self.request.get(escape_html('email'))
user_driverLicense = self.request.get(escape_html('driverLicense'))
resident_error = ""
SSN_error = ""
driverLicense_error = ""
contract_type = self.request.get("contractType")
owner = self.request.get("owner")
witness = self.request.get("witness ")
if (resident_name and valid_resident(resident_name)) \
and (user_SSN and valid_SSN(user_SSN)) \
and ((not user_email) or (user_email and valid_email(user_email))):
self.redirect('/welcome?resident=%s&nacionality=%s?SSN=%s?driverLicense=%s?email=%s?witness =%s?owner=%s' % {"resident":resident_name,
"nacionality":user_nacionality,
"SSN":user_SSN,
"driverLicense":user_driverLicense,
"email":user_email,
"witness":witness,
"owner":owner})
else:
if not valid_resident(resident_name):
resident_error = "Oh no!!! this resident name isn't valid!"
if not valid_SSN(user_SSN):
SSN_error = "Oh no!!! SSN isn't valid!"
if user_email and not valid_email(user_email):
email_error = "Oh no!!! e-mail isn't valid!"
self.write_form(form % {"resident":resident_name,
"resident_error":resident_error,
"SSN":user_SSN,
"SSN_error":SSN_error,
"driverLicense":user_driverLicense,
"email":user_email,
})
class WelcomeHandler(webapp2.RequestHandler):
def get(self):
geted_resident_name = self.request.get('resident')
geted_user_nacionality = self.request.get("nacionality")
geted_user_SSN = self.request.get('SSN')
geted_user_email = self.request.get('email')
geted_user_driverLicense = self.request.get('driverLicense')
geted_resident_error = ""
geted_SSN_error = ""
geted_driverLicense_error = ""
#geted_contract_type = self.request.get("contractType")
geted_owner = self.request.get("owner")
geted_witness = self.request.get("witness ")
self.response.out.write(welcome % {"resident":geted_resident_name,
"nacionality":geted_user_nacionality,
"SSN":geted_user_SSN,
"SSN_error":geted_SSN_error,
"driverLicense":geted_user_driverLicense,
"email":geted_user_email,
"witness ":geted_witness ,
"owner":geted_owner,
})
app = webapp2.WSGIApplication([('/', MainHandler), ('/welcome', WelcomeHandler)],
debug=True)
答案 0 :(得分：3)
用于字符串格式的%运算符的右手参数必须是元组，而不是字典。在您的情况下，dict将替换格式字符串中第一次出现的%s，而没有足够的其他对象来替换其他对象。您需要手动构建要用于替换的项目元组，例如：
('/welcome?resident=%s&nacionality=%s?SSN=%s?driverLicense=%s?email=%s?witness =%s?
owner=%s' % (resident_name, user_nacionality, user_SSN, user_driverLicense, user_email,
witness, owner)
答案 1 :(得分：1)
当你在字符串中有x格式参数但是你只传递y参数匹配那时（其中x＆gt; y）时，没有引起足够的参数。
在您的情况下，您有一个未命中％，只需将s％更改为％s。
self.redirect('/welcome?resident=%s&nacionality=%s?SSN=%s?driverLicense=%s?email=s%?witness =%s?owner=%s' % {"resident":resident_name,
"nacionality":user_nacionality,
"SSN":user_SSN,
"driverLicense":user_driverLicense,
"email":user_email,
"witness ":witness ,
"owner":owner})