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Use of *args and **kwargs [duplicate]
...number of arguments to your function. For example:
>>> def print_everything(*args):
for count, thing in enumerate(args):
... print( '{0}. {1}'.format(count, thing))
...
>>> print_everything('apple', 'banana', 'cabbage')
0. apple
1. banana
2. cabbage
Similarly, *...
C++ multiline string literal
...lls and script languages like Python and Perl and Ruby.
const char * vogon_poem = R"V0G0N(
O freddled gruntbuggly thy micturations are to me
As plured gabbleblochits on a lurgid bee.
Groop, I implore thee my foonting turlingdromes.
And hoopt...
Reverse colormap in matplotlib
...ly reverse the color order of a given colormap in order to use it with plot_surface.
7 Answers
...
How to calculate moving average using NumPy?
... an off-by-one wrong indexing spotted by Bean in the code. EDIT
def moving_average(a, n=3) :
ret = np.cumsum(a, dtype=float)
ret[n:] = ret[n:] - ret[:-n]
return ret[n - 1:] / n
>>> a = np.arange(20)
>>> moving_average(a)
array([ 1., 2., 3., 4., 5., 6., 7....
PDO closing connection
...>connection = new PDO();
$this->connection->query('KILL CONNECTION_ID()');
$this->connection = null;
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Equals(=) vs. LIKE
...the = comparison operator:
mysql> SELECT 'ä' LIKE 'ae' COLLATE latin1_german2_ci;
+-----------------------------------------+
| 'ä' LIKE 'ae' COLLATE latin1_german2_ci |
+-----------------------------------------+
| 0 |
+----------------------------------...
FragmentPagerAdapter Exists Only In Android.Support.V4.App (and not Android.App)
...pp.Fragment;
namespace Support4
{
[Activity (Label = "@string/fragment_pager_support")]
[IntentFilter (new[]{Intent.ActionMain}, Categories = new[]{ "mono.support4demo.sample" })]
public class FragmentPagerSupport : Activity
//public class FragmentPagerSupport : FragmentActivity
...
Serializing object that contains cyclic object value
... if (typeof v =='object') {
if ( !seen.indexOf(v) ) { return '__cycle__'; }
seen.push(v);
} return v;
});
return jso;
};
var obj={
g:{
d:[2,5],
j:2
},
e:10
};
obj.someloopshere = [
obj.g,
obj,
{ a: [ obj.e, obj ] }
];
c...
Convert a row of a data frame to vector
...u have to be careful if your row contains a factor. Here is an example:
df_1 = data.frame(V1 = factor(11:15),
V2 = 21:25)
df_1[1,] %>% as.numeric() # you expect 11 21 but it returns
[1] 1 21
Here is another example (by default data.frame() converts characters to factors)
d...
Iterate an iterator by chunks (of n) in Python? [duplicate]
...', 'x') --> ABC DEF Gxx"
args = [iter(iterable)] * n
return izip_longest(fillvalue=fillvalue, *args)
It will fill up the last chunk with a fill value, though.
A less general solution that only works on sequences but does handle the last chunk as desired is
[my_list[i:i + chunk_size] f...