我正在做Zed Shaw的奇妙学习Python The Hard Way,但是另外一个问题让我感到难过:第9-10行可以写成一行,怎么样？我尝试了一些不同的想法,但无济于事.我可以继续前进,但那有什么乐趣呢？
from sys import argv
from os.path import exists
script, from_file, to_file = argv
print "Copying from %s to %s" % (from_file, to_file)
# we could do these two on one line too, how?
input = open(from_file)
indata = input.read()
print "The input file is %d bytes long" % len(indata)
print "Does the output file exist? %r" % exists(to_file)
print "Ready, hit RETURN to continue, CTRL-C to abort."
raw_input()
output = open(to_file, 'w')
output.write(indata) …我已经关注了Django Book直到第七章,我目前正在搞乱表格,GET,POST和所有这些善良.有一次,指南让我在填写并发送表单后弄清楚反应,但是当我发送表单数据时,我收到此错误:
error at /contact/ [Errno 10061] No connection could be made because the target machine actively refused itRequest Method: POST Request URL: http://127.0.0.1:8000/contact/ Django Version: 1.3 Exception Type: error Exception Value: [Errno 10061] No connection could be made because the target machine actively refused it Exception Location: C:\Python27\lib\socket.py in create_connection, line 571 Python Executable: C:\Python27\python.exe Python Version: 2.7.2
换句话说,在此之前我没有任何端口问题.我只是在Windows防火墙中明确地打开了端口10061,但看起来却无济于事.(runserver在我改变规则后,我关闭并打开了.)
我正在运行Windows 7,我的问题的要点是这个错误消息究竟意味着什么比如何处理它更多(当然,两者都是可取的).
编辑:我还转发了Windows防火墙中的端口8000(适用于所有配置文件,TCP),但我仍然得到看起来像相同的错误.
在Chrome中,<textarea>可以拉动字段的右下角以展开文本区域.这有时会有其优点,但有时却没有.(这个讨论是另一次.)
我想知道的是如果可能的话我可以阻止这种行为.我正在考虑一些JS/jQuery dingus的内容,但我真的不知道Google是如何编写该功能的.
谁有人涉足这个？
在尝试查找存储和保存settings.py和数据库之外的设置的地方时,我使用了environment.json作为环境变量.我在settings.py中导入这些.
我的问题是,当我尝试在我的环境中更改或存储新值时env,settings.py不会注意到更改 - 可能是因为Django读取了settings.py的时间和次数.
有没有办法可以按照我想要的方式使用我的环境变量？
# settings.py
import json
with open('/home/dotcloud/environment.json') as f:
env = json.load(f)
EMAIL_HOST = env.get('EMAIL_PORT', '500')
# views.py
import json
def site_configuration(request):
with open('/home/dotcloud/environment.json') as f:
env = json.load(f)
if request.method == 'POST':
os.environ['EMAIL_PORT'] = request.POST['email_port']
return render(request, ...)
# python manage.py shell demo
>>> import json
>>> with open('/home/dotcloud/environment.json') as f:
... env = json.load(f)
...
>>> project_settings.EMAIL_PORT
'500'
>>> env['EMAIL_PORT']
Traceback (most recent call last):
File "<console>", line 1, in …这个问题已在其他地方提到,但它没有提供可行的解决方案,所以我仍然希望打开一张票.
c:\Users\me\Desktop\temp\py-bcrypt-0.2>setup.py install build --compiler=min gw32 running install running build running build_py running build_ext building 'bcrypt._bcrypt' extension C:\MinGW\bin\gcc.exe -mno-cygwin -mdll -O -Wall -IC:\Python27\include -IC:\Python27\PC -c bcrypt/bcrypt_python.c -o build\temp.win32-2.7\Release\bcrypt\bcrypt_python.o bcrypt/bcrypt_python.c:29:26: error: expected declaration specifiers or '...' before 'u_int8_t' bcrypt/bcrypt_python.c:29:38: error: expected declaration specifiers or '...' before 'u_int16_t' bcrypt/bcrypt_python.c:29:49: error: expected declaration specifiers or '...' before 'u_int8_t' bcrypt/bcrypt_python.c: In function 'bcrypt_encode_salt': bcrypt/bcrypt_python.c:56:2: error: too many arguments to function 'encode_salt' bcrypt/bcrypt_python.c:29:6: note: declared here error: command 'gcc' failed with exit …
我试图清除我的数据库,mydb并重新填充它以查看我的Django模型的一些更改的影响.然后这一切都发生了.我回滚到我早期的模型设置,但我仍然得到错误.
我不是MySQL专家,我不能完全弄清楚问题以及如何处理它; 我尝试使用其他名称创建一个新数据库,但这没有发生.我认为这是我的Django项目创建的问题.
这是所有信息:
C:\Users...>python manage.py syncdb Creating tables ... Creating table auth_permission Creating table auth_group_permissions Creating table auth_group Creating table auth_user_user_permissions Creating table auth_user_groups Creating table auth_user Creating table auth_message Creating table django_content_type Creating table django_session Creating table django_site Creating table django_admin_log Creating table forum_category Creating table forum_thread Creating table forum_post You just installed Django's auth system, which means you don't have any superusers defined. Would you like to create one now? (yes/no): yes …
我在Django遇到了很多问题(并非所有问题都解决了),但这是迄今为止最奇怪,最难以理解的问题.当我加载页面时会发生这种情况:
>python manage.py runserver
Validating models...
0 errors found
Django version 1.3.1, using settings 'ponysite.settings'
Development server is running at http://127.0.0.1:8000/
Quit the server with CTRL-BREAK.
[01/Nov/2011 01:21:49] "GET / HTTP/1.0" 500 102747
Traceback (most recent call last):
File "C:\Python27\lib\site-packages\django\core\servers\basehttp.py", line 284, in run
self.finish_response()
File "C:\Python27\lib\site-packages\django\core\servers\basehttp.py", line 324, in finish_response
self.write(data)
File "C:\Python27\lib\site-packages\django\core\servers\basehttp.py", line 420, in write
self._write(data)
File "C:\Python27\lib\socket.py", line 324, in write
self.flush()
File "C:\Python27\lib\socket.py", line 303, in flush
self._sock.sendall(view[write_offset:write_offset+buffer_size])
error: [Errno 10054] An existing connection was …