yuliji

import multiprocessing
import time
 
def cube(x):
    return x**3
 
if __name__ == "__main__":
    pool = multiprocessing.Pool(3)
    start_time = time.perf_counter()
    processes = [pool.apply_async(cube, args=(x,)) for x in range(1,1000)]

yuliji

import { execSync } from 'child_process';



export async function runTest(args: TestArgs) {
  execSync(`echo "run e2e for ${args.page} in ${args.browser}"`, {encoding: 'utf-8', stdio: ['pipline', 'inherit', 'inherit']});
    execSync(`echo "run e2e for ${args.page} in ${args.browser}"`, {encoding: 'utf-8', stdio: 'inherit'}); // use parents config of stdio
}

yuliji

const child_process = require('child_process');

const ls = child_process.spawn('bash', [], { stdio: 'inherit' });

ls.on('close', (code) => {
  console.log(`child process exited with code ${code}`);
});

yuliji

>>> b = '区块链是金融系统的未来'.encode('utf-8')
>>> b
b'\xe5\x8c\xba\xe5\x9d\x97\xe9\x93\xbe\xe6\x98\xaf\xe9\x87\x91\xe8\x9e\x8d\xe7\xb3\xbb\xe7\xbb\x9f\xe7\x9a\x84\xe6\x9c\xaa\xe6\x9d\xa5'
>>> int.from_bytes(b, byteorder='big', signed=False)
26580042452449738111737693352426092008374866632327585440351958788959384868658597
>>> hex(int.from_bytes(b, byteorder='big', signed=False))
'0xe58cbae59d97e993bee698afe98791e89e8de7b3bbe7bb9fe79a84e69caae69da5'

yuliji

trap 'kill -- $$' INT TERM QUIT;

# -- is a conventional marker recognised by most argument parsers which means "consider everything beyond this to be positional arguments (not flags)".

yuliji

             add_header Last-Modified $date_gmt;
             add_header Cache-Control 'no-store, no-cache, must-revalidate, proxy-revalidate, max-age=0';
             if_modified_since off;
             expires off;
             etag off;

yuliji

from PIL import Image
img = Image.open('image.png').convert('LA')
img.save('greyscale.png')

yuliji

//https://github.com/yargs/yargs/issues/225

var yargs = require('yargs')
var argv = yargs
  .usage('usage: $0 <command>')
  .command('create', 'create a new [project|module]', function (yargs) {
    argv = yargs
      .usage('usage: $0 create <item> [options]')
      .command('project', 'create a new project', function (yargs) {
        console.log('creating project :)')

yuliji

# Import our modules that we are using
import matplotlib.pyplot as plt
import numpy as np

# Create the vectors X and Y
x = np.array(range(10))
y = x ** 2

# Create the plot
plt.plot(x,y,label='y = x**2')

yuliji

from datetime import datetime, timezone
datetime.now(tz=timezone.utc).isoformat()
#'2020-09-18T11:19:55.651168+00:00'



def get_timestamp():
    now = datetime.datetime.utcnow()
    t = now.isoformat("T", "milliseconds")
    return t + "Z"