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Python nested functions variable scoping [duplicate]
...the statement b = 4 commented out, this code outputs 0 1, just what you'd expect.
But if you uncomment that line, on the line print b, you get the error
UnboundLocalError: local variable 'b' referenced before assignment
It seems mysterious that the presence of b = 4 might somehow make b disappea...
Is it possible to set code behind a resource dictionary in WPF for event handling?
Is it possible to set code behind a resource dictionary in WPF. For example in a usercontrol for a button you declare it in XAML. The event handling code for the button click is done in the code file behind the control. If I was to create a data template with a button how can I write the event handl...
How to check if all list items have the same value and return it, or return an “otherValue” if they
...
var val = yyy.First().Value;
return yyy.All(x=>x.Value == val) ? val : otherValue;
Cleanest way I can think of. You can make it a one-liner by inlining val, but First() would be evaluated n times, doubling execution time.
To incorporate the "empty set" behavior ...
ValueError: setting an array element with a sequence
... array from a list that isn't shaped like a multi-dimensional array. For example
numpy.array([[1,2], [2, 3, 4]])
or
numpy.array([[1,2], [2, [3, 4]]])
will yield this error message, because the shape of the input list isn't a (generalised) "box" that can be turned into a multidimensional array...
rgdal package installation
The issue here is not exactly how to plot maps through R, as I have found already a pretty nice example here , but rather how to make it work. In fact, I am unable to load library rgdal :
...
'and' (boolean) vs '&' (bitwise) - Why difference in behavior with lists vs numpy arrays?
What explains the difference in behavior of boolean and bitwise operations on lists vs NumPy arrays?
8 Answers
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How to take all but the last element in a sequence using LINQ?
...e;
T item = default(T);
do {
hasRemainingItems = it.MoveNext();
if (hasRemainingItems) {
if (!isFirst) yield return item;
item = it.Current;
isFirst = false;
}
} while (hasRemainingItems);
}
static void Main(string[] args) {
...
Logical XOR operator in C++?
...sarily do what you might want for non-booleans. And as this is C++, there exists a real bool type instead of having to use int for that purpose.
– Greg Hewgill
Oct 20 '09 at 21:19
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Is there an easy way to pickle a python function (or otherwise serialize its code)?
...hich can then be reassembled into a function. ie:
import marshal
def foo(x): return x*x
code_string = marshal.dumps(foo.func_code)
Then in the remote process (after transferring code_string):
import marshal, types
code = marshal.loads(code_string)
func = types.FunctionType(code, globals(), "so...
What is tail recursion?
...learn lisp, I've come across the term tail-recursive . What does it mean exactly?
28 Answers
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