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How to get a reference to a module inside the module itself?
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One more technique, which doesn't import the sys module, and arguably - depends on your taste - simpler:
current_module = __import__(__name__)
Be aware there is no import. Python imports each module only once.
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Any way to properly pretty-print ordered dictionaries?
I like the pprint module in Python. I use it a lot for testing and debugging. I frequently use the width option to make sure the output fits nicely within my terminal window.
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C++及Windows异常处理(try，catch; __try,__finally, __except) - C/C++ - ...
...期”机制替他记住了 :O) ] 下面是一个例子：
class File_handle {
FILE* p;
public:
File_handle(const char* n, const char* a)
{ p = fopen(n,a); if (p==0) throw Open_error(errno); }
File_handle(FILE* pp)
{ p = pp; if (p==0) thro...
Create singleton using GCD's dispatch_once in Objective-C
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This is a perfectly acceptable and thread-safe way to create an instance of your class. It may not technically be a "singleton" (in that there can only ever be 1 of these objects), but as long as you only use the [Foo sharedFoo] method to access the objec...
Is there an easy way to request a URL in python and NOT follow redirects?
...2 it looks like the easiest way to do it would be to subclass HTTPRedirectHandler and then use build_opener to override the default HTTPRedirectHandler, but this seems like a lot of (relatively complicated) work to do what seems like it should be pretty simple.
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How can I add reflection to a C++ application?
... to be able to introspect a C++ class for its name, contents (i.e. members and their types) etc. I'm talking native C++ here, not managed C++, which has reflection. I realise C++ supplies some limited information using RTTI. Which additional libraries (or other techniques) could supply this informat...
Timeout for python requests.get entire response
I'm gathering statistics on a list of websites and I'm using requests for it for simplicity. Here is my code:
19 Answers
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In a Django form, how do I make a field readonly (or disabled) so that it cannot be edited?
...ed in favor of the value from the form’s initial data.
With Django 1.8 and earlier, to disable entry on the widget and prevent malicious POST hacks you must scrub the input in addition to setting the readonly attribute on the form field:
class ItemForm(ModelForm):
def __init__(self, *args, ...
List changes unexpectedly after assignment. How do I clone or copy it to prevent this?
... any modifications to new_list changes my_list everytime. Why is this, and how can I clone or copy the list to prevent it?
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How can I implement a tree in Python?
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pre-order tree iteration
post-order tree iteration
resolve relative and absolute node paths
walking from one node to an other.
tree rendering (see example above)
node attach/detach hookups
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