I have 3+years developer experience in python, but I always develop
about peer-to-peer service. Have no backend experience in python.
But now I want to change to backend engineer, somebody shares their
job is to do like
1. Develop customize API to receive data from global
2. Develop tools with
I tried to receive msg from kernel via netlink of socket.
And I use epoll to receive netlink events whenever it comes from kernel to
user space.
But I found the performance is poor e.g. epoll costs 90% time of execution
time after I profile it by cProfile module.
Are there any tips to improve
I meet performance is low when I use struct.unpack to unpack binary data.
So I tried to use numpy.ndarray
But meet error when I want to unpack multiple dtypes
Can anyone teach me~
Code like below:
# python3
import struct
import numpy as np
s1 = struct.Struct("@QIQ")
ss1 = s1.pack(1,11,111)
I tried to plot graph about a time-series with library statsmodel.
I decide to plot autocorrelation function, but I don't know the blue
section in the example graph mean...
Can anyone tell me?
The plot_acf example link:
>
> The source code is here:
> https://github.com/python/cpython/blob/master/Lib/socketserver.py . You
> should find all the technical details you are looking for in it.
>
>
# poll/select have the advantage of not requiring any extra file
> descriptor,# contrarily to epoll/kqueue (also, they
As title,
I want to use socketserver to replace my own server code to
maintain ealsier.
But I don't found any info about tech. detail of socketserver, epoll is
important.
Can anyone tell me?
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Dennis Lee Bieber 於 2019年11月21日 週四 上午2:17寫道：
> On Wed, 20 Nov 2019 18:51:31 +0800, lampahome
> declaimed the following:
>
> >
> >I only use a while loop to catch events like below:
> >import select, socket
> >sock = socket.socket(socket.AF_INET,
I use epoll to listen events to receive packet from remote client via tcp
socket
And I found it still lose packet from remote client when client sends 128
messages to me.
Is there any tips to avoid this? thx
I only use a while loop to catch events like below:
import select, socket
sock =
I make a class Wrapper inherited from dict and met problem when I want to
pickle it.
Is there anyway to make __getstate__ of Wrapper to output a normal
dict?(Output a dict will help pickleing easily)
=== code ===
import pickle
class Wrapper(dict):
def __getattr__(self, attr):
return
As title, I tried to communicate with kernel via netlink. But I failed when
I receive msg from kernel.
The weird point is sending successfully from user to kernel, failed when
receiving from kernel.
So I want to check code in 3rd library and dig in, but always found library
called netlinkg but
>
> Well, there's a Python library called "paramiko" which implements ssh.
> That might help.
>
> Later I will try lol.
> Note also that since stdin and stdout are pipes and not the terminal
> then ssh will not be interactive, and will not allocate a tty at the far
> end either. You can get ssh
Hello, I use python3.5 and found no way to solve this problem
>from subprocess import Popen, PIPE
>ps = Popen('ssh -o \'StrictHostKeyChecking no\' hello@192.168.80.11 \'sudo
sysctl -w vm.drop_caches=3\', stdin=PIPE, stdout=PIPE, stderr=PIPE,
bufsize=0, shell=True)
> hello@192.168.80.11's
I want to parse a path string with multiple files and try to figure out a
one-line way.
If I have path: /home/admin/hello/yo/{h1,h2,h3,h4}
What I thought is use regex.search, but the pattern always failed.
I use below:
import re
path = /home/admin/hello/yo/{h1,h2,h3,h4}
r = re.search('{.}',
as title,
I confused will fd will be close after exception automatically?
Like:
try:
fd=open("file","w+")
fd.get() //any useless function of fd
except Exception:
print 'hi'
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I write program to do experiment about time series(weekly) with machine
learning.
I record changes of everyday of each ID and Count.
I read the csv as dataset like below:
ID, Count
1,30 // First Day
2,33
3,45
4,11
5,66
7,88
1,32 // 2nd Day
2,35
3,55
4,21
5,36
7,48
I have two array X, y. I want to
I have two categories A,B, and A has 2 items A1,A2, and B have 2 items B1,
B2.
I have two class A and B, and A will handle A1,A2, B handle B1,B2.
I want to parse one of A1,A2,B1,B2 to script and generate the corresponding
class(object).
Ex: Both in class A and B, all have func1(), func2().
What
>
>
> The rest is just cruft ;)
> >
> > *Is there better design pattern for me?*
>
> If A does B to C, is that a crime?
>
No
> Your problem description suffers from overgeneralisation.
>
> Generally speaking you get better solutions when you ask yourself
> "How can I solve this problem
I have two categories A,B, and A has 2 items A1,A2
B have 2 items B1, B2.
I have two class A and B, and A will handle A1,A2, B handle B1,B2.
I want to parse one of A1,A2,B1,B2 to script and generate the corresponding
class(object).
Ex: Both in class A and B, all have func1(), func2().
What I
I want to plot a graph and *still run following code without closing the
graph automatically like Matlab does*.
I try plt.show(block=False) , it failed and appear in a small moment then
close itself.
I also try plt.draw() or interactive mode , it failed, too.
plt.draw() will block until I close
so py_compile.compile() doesn't normalize the filename, but it will pass
the input filename to co_filename?
2018-02-12 19:27 GMT+08:00 eryk sun <eryk...@gmail.com>:
> On Mon, Feb 12, 2018 at 9:40 AM, lampahome <pahome.c...@mirlab.org> wrote:
> > I want to know abspath of p
I want to know abspath of python script followed by steps below.
1. *built it to byte code by py_compile.*
2. *execute it to check abspath.*
But I got *2 results* when I execute it.I found the *results based on the
path of script* followed by py_compile.
Here is my script test.py :
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