大约有 13,700 项符合查询结果(耗时:0.0283秒) [XML]

https://stackoverflow.com/ques... 

Django 1.7 throws django.core.exceptions.AppRegistryNotReady: Models aren't loaded yet

...t os from django.core.handlers.wsgi import WSGIHandler os.environ['DJANGO_SETTINGS_MODULE'] = 'myapp.settings' application = WSGIHandler() When I updated to the 1.7 style WSGI handler: import os from django.core.wsgi import get_wsgi_application os.environ['DJANGO_SETTINGS_MODULE'] = 'myapp.se...
https://stackoverflow.com/ques... 

Why do I get a segmentation fault when writing to a “char *s” initialized with a string literal, but

...the pointer to void * as in printf("%p", (void *)str); When printing a size_t with printf, you should use "%zu" if using the latest C standard (C99). – Chris Young Oct 3 '08 at 7:44 ...
https://stackoverflow.com/ques... 

How do you detect/avoid Memory leaks in your (Unmanaged) code? [closed]

...e quick summary of those articles. First, include these headers: #define _CRTDBG_MAP_ALLOC #include <stdlib.h> #include <crtdbg.h> Then you need to call this when your program exits: _CrtDumpMemoryLeaks(); Alternatively, if your program does not exit in the same place every time, ...
https://stackoverflow.com/ques... 

Is nested function a good approach when required by only one function? [closed]

... >>> def sum(x, y): ... def do_it(): ... return x + y ... return do_it ... >>> a = sum(1, 3) >>> a <function do_it at 0xb772b304> >>> a() 4 Is this what you were looking for? It's called a closure. ...
https://stackoverflow.com/ques... 

How to join two sets in one line without using “|”

... You can use union method for sets: set.union(other_set) Note that it returns a new set i.e it doesn't modify itself. share | improve this answer | f...
https://stackoverflow.com/ques... 

How do you use the ellipsis slicing syntax in Python?

...'d use it like this: >>> class TestEllipsis(object): ... def __getitem__(self, item): ... if item is Ellipsis: ... return "Returning all items" ... else: ... return "return %r items" % item ... >>> x = TestEllipsis() >>> print ...
https://stackoverflow.com/ques... 

Subprocess changing directory

... @The_Diver That's why cd must be implemented as internal shell command. There's no other way to do it. Internal shell commands are executed within the same process as the shell. What I meant by subshell is the shell executed for ...
https://stackoverflow.com/ques... 

What is the difference between char array and char pointer in C?

...sizeof(q)); // => size of char array in memory -- 6 on both // size_t strlen(const char *s) and we don't get any warnings here: printf("%zu\n", strlen(p)); // => 5 printf("%zu\n", strlen(q)); // => 5 return 0; } foo* and foo[] are different types and they are handled dif...
https://stackoverflow.com/ques... 

How to print to stderr in Python?

...ound this to be the only one short + flexible + portable + readable: from __future__ import print_function import sys def eprint(*args, **kwargs): print(*args, file=sys.stderr, **kwargs) The function eprint can be used in the same way as the standard print function: >>> print("Test...
https://stackoverflow.com/ques... 

What is a plain English explanation of “Big O” notation?

... -1: This is blatantly wrong: _"BigOh is relative representation of complexity of algorithm". No. BigOh is an asymptotic upper bound and exists quite well independent of computer science. O(n) is linear. No, you are confusing BigOh with theta. log n is O(...