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Are nested try/except blocks in python a good programming practice?
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return object.__getattribute__(item) is incorrect and will produce a TypeError because the wrong number of arguments are being passed. It should instead be return object.__getattribute__(self, item).
– martineau
Jun 20 '14 at 1:05
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How to get the parent dir location
...with dirname or joining or any of that. Just treat __file__ as a directory and start climbing:
# climb to __file__'s parent's parent:
os.path.abspath(__file__ + "/../../")
That's far less convoluted than os.path.abspath(os.path.join(os.path.dirname(__file__),"..")) and about as manageable as dirn...
TypeError: method() takes 1 positional argument but 2 were given
...ten), you really don't care about the object that your method is bound to, and in that circumstance, you can decorate the method with the builtin staticmethod() function to say so:
class MyOtherClass:
@staticmethod
def method(arg):
print(arg)
...in which case you don't need to ad...
Is gcc's __attribute__((packed)) / #pragma pack unsafe?
...6 systems won't reveal the problem. (On the x86, misaligned accesses are handled in hardware; if you dereference an int* pointer that points to an odd address, it will be a little slower than if it were properly aligned, but you'll get the correct result.)
On some other systems, such as SPARC, att...
How do I override __getattr__ in Python without breaking the default behavior?
...oo has no attribute called bar. If the attribute is one you don't want to handle, raise AttributeError:
class Foo(object):
def __getattr__(self, name):
if some_predicate(name):
# ...
else:
# Default behaviour
raise AttributeError
However, un...
What do I use for a max-heap implementation in Python?
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The easiest way is to invert the value of the keys and use heapq. For example, turn 1000.0 into -1000.0 and 5.0 into -5.0.
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How to return a value from __init__ in Python?
... implicit in Python? I assumed Python's semantics were different from Java and the other languages that do use this word.
– cs95
Jul 20 '16 at 6:06
1
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Why use def main()? [duplicate]
I've seen some code samples and tutorials that use
5 Answers
5
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Add a prefix to all Flask routes
...n as a sub-part of that WSGI container (anything that speaks WSGI will do) and to set your APPLICATION_ROOT config value to your prefix:
app.config["APPLICATION_ROOT"] = "/abc/123"
@app.route("/")
def index():
return "The URL for this page is {}".format(url_for("index"))
# Will return "The UR...
What do all of Scala's symbolic operators mean?
...e method defined on List (though it could be the object of the same name), and :+= is probably the method defined on various Buffer classes.
So, let's see them.
Keywords/reserved symbols
There are some symbols in Scala that are special. Two of them are considered proper keywords, while others are...