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Python assigning multiple variables to same value? list behavior
...nt to know if two names are naming the same object, use the is operator:
>>> a=b=c=[0,3,5]
>>> a is b
True
You then ask:
what is different from this?
d=e=f=3
e=4
print('f:',f)
print('e:',e)
Here, you're rebinding the name e to the value 4. That doesn't affect the names...
How do you render primitives as wireframes in OpenGL?
...ited Nov 15 '19 at 14:49
genpfault
46.1k99 gold badges6363 silver badges116116 bronze badges
answered Sep 26 '08 at 3:43
...
Find the most frequent number in a numpy vector
...all array with a large range would create an excessively large array. Apoengtus's answer below is much better, although I don't think numpy.unique() existed in 2011, when this answer was created.
– Wehrdo
Mar 13 '16 at 22:03
...
How to convert 2D float numpy array to 2D int numpy array?
...
Use the astype method.
>>> x = np.array([[1.0, 2.3], [1.3, 2.9]])
>>> x
array([[ 1. , 2.3],
[ 1.3, 2.9]])
>>> x.astype(int)
array([[1, 2],
[1, 2]])
...
random.seed(): What does it do?
...
>>> random.seed(9001)
>>> random.randint(1, 10)
1
>>> random.seed(9001)
>>> random.randint(1, 10)
1
>>> random.seed(9001)
>>> random...
How to remove the first Item from a list?
...
Python List
list.pop(index)
>>> l = ['a', 'b', 'c', 'd']
>>> l.pop(0)
'a'
>>> l
['b', 'c', 'd']
>>>
del list[index]
>>> l = ['a', 'b', 'c', 'd']
>>> del l[0]
>>> l
['b', 'c', 'd']
>>...
Is there a better way to iterate over two lists, getting one element from each list for each iterati
...
Another way to do this would be to by using map.
>>> a
[1, 2, 3]
>>> b
[4, 5, 6]
>>> for i,j in map(None,a,b):
... print i,j
...
1 4
2 5
3 6
One difference in using map compared to zip is, with zip the length of new list is
same as the ...
Set Background cell color in PHPExcel
...
$sheet->getStyle('A1')->applyFromArray(
array(
'fill' => array(
'type' => PHPExcel_Style_Fill::FILL_SOLID,
'color' => array('rgb' => 'FF0000')
)
)
);
Source: http://...
CodeIgniter: How to get Controller, Action, URL information
...
You could use the URI Class:
$this->uri->segment(n); // n=1 for controller, n=2 for method, etc
I've also been told that the following work, but am currently unable to test:
$this->router->fetch_class();
$this->router->fetch_method();
...
What is a “memory stomp”?
... but I would like to give an example.
int a[10], i;
for (i = 0; i < 11 ; i++)
a[i] = 0;
int i, a[10];
for (i = 0; i < 11 ; i++)
a[i] = 0;
These samples may lead into infinite loop (or may not lead), because it is undefined behavior.
Very likely variable i in memory ...