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How can I create Min stl priority_queue?
...are> pq;
people person1,person2,person3;
person1.salary=100;
person1.age = 50;
person2.salary=80;
person2.age = 40;
person3.salary = 100;
person3.age=40;
pq.push(person1);
pq.push(person2);
pq.push(person3);
...
Detect if a NumPy array contains at least one non-numeric value?
...ny()
Edit: 30x faster:
import timeit
s = 'import numpy;a = numpy.arange(10000.).reshape((100,100));a[10,10]=numpy.nan'
ms = [
'numpy.isnan(a).any()',
'any(numpy.isnan(x) for x in a.flatten())']
for m in ms:
print " %.2f s" % timeit.Timer(m, s).timeit(1000), m
Results:
0.11 s num...
How to calculate a logistic sigmoid function in Python?
...eturn 1 / (1 + math.exp(-x))
....:
In [6]: %timeit -r 1 sigmoid(0.458)
1000000 loops, best of 1: 371 ns per loop
In [7]: %timeit -r 1 logistic.cdf(0.458)
10000 loops, best of 1: 72.2 µs per loop
In [8]: %timeit -r 1 expit(0.458)
100000 loops, best of 1: 2.98 µs per loop
As expected logist...
How to round to 2 decimals with Python?
...er up to a certain decimal place?
import math
v = 2.357
print(math.ceil(v*100)/100) # -> 2.36
print(math.floor(v*100)/100) # -> 2.35
or:
from math import floor, ceil
def roundDown(n, d=8):
d = int('1' + ('0' * d))
return floor(n * d) / d
def roundUp(n, d=8):
d = int('1' + (...
How to bind inverse boolean properties in WPF?
...
100
Have you considered an IsNotReadOnly property? If the object being bound is a ViewModel in a M...
Restore the state of std::cout after manipulating it
...
100
you need to #include <iostream> or #include <ios> then when required:
std::ios_ba...
Getting “Lock wait timeout exceeded; try restarting transaction” even though I'm not using a transac
...s you undo a messup and then fix the application. If I could give this guy 100 up votes for this issue which I had to fix NOW I would.
– Lizardx
May 26 '16 at 21:44
8
...
Reading/writing an INI file
...s.ini");
You can write some values like so:
MyIni.Write("DefaultVolume", "100");
MyIni.Write("HomePage", "http://www.google.com");
To create a file like this:
[MyProg]
DefaultVolume=100
HomePage=http://www.google.com
To read the values out of the INI file:
var DefaultVolume = MyIni.Read("DefaultV...
Reading binary file and looping over each byte
...ead, chunksize), b''), maxlen=0)
Example:
$ dd if=/dev/zero bs=1M count=1000 | python3 blackhole.py
It processes ~1.5 GB/s when chunksize == 32768 on my machine and only ~7.5 MB/s when chunksize == 1. That is, it is 200 times slower to read one byte at a time. Take it into account if you can ...
Pickle or json?
...SON being faster is outdated by a few years. stackoverflow.com/a/39607169/1007353
– JDiMatteo
Sep 22 '16 at 1:34
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