arischow

# -*- coding: utf-8 -*-
print('Hello, my Gist!')

arischow

# Py 文件所在目录
import os
print(__file__)  # 包括文件名
print(os.path.dirname(os.path.abspath(__file__)))



# REDIS SET ADD
import redis
r = redis.Redis(host='localhost', port=6379, db=0)

arischow

def opcount(fname):
    with open(fname) as f:
        for i, l in enumerate(f):
            pass
    return i + 1

arischow

# 获取某目录下的所有同类型文件

import os
import fnmatch

matches = []

for root, dirs, files in os.walk('/Users/arischow/Desktop/data'):
    for file in fnmatch.filter(files, '*.txt'):
        matches.append(os.path.join(root, file))

arischow

# Check http://stackoverflow.com/questions/17285826/flask-redirecting-multiple-routes for more details.

arischow

// Get all query string
var after_slash = window.location.search // "search?number=007&name=Aris&addr=PHP+is+the+best"

var urlParams = new URLSearchParams(window.location.search);

console.log(urlParams.get('number'));  // "007";
console.log(urlParams.get('name'));    // "Aris"
console.log(urlParams.get('addr'));    // "PHP is the best";
console.log(urlParams.has('name'));    // true
console.log(urlParams.append('language', 'zh_CN')); // "?number=007&name=Aris&addr=PHP+is+the+best&language=zh_CN"

arischow

# dropping a database via pymongo
from pymongo import Connection
client = MongoClient() # default host localhost, port 27017
client.drop_database('mydatabase')

# drop a collection via pymongo
from pymongo import Connection
client = MongoClient()
client['mydatabase'].drop_collection('mycollection')

arischow

# Based on https://medium.com/@adriennedomingus/soft-deletion-in-django-e4882581c340
# There’s one other thing that might be interesting to point out about the implementation of the soft-deletion: the unique together constraint. 
# If you have a model with a unique together rule for fields ‘a’ and ‘b’, when an entry with the values ‘a=1’ and ‘b=2’ is soft-deleted, another one could not be created with the same values for those fields. So the ‘deleted_at’ has to be included on the constraint.

from django.db import models
from django.utils import timezone


class HasDeletedError(Exception):
    pass

arischow

import random
# 生成5个0~9的不重复随机数
print random.sample(range(10), 5)
# [7, 9, 6, 2, 3]

# 从a~d中取出不重复的三个字母
print random.sample(['a', 'b', 'c', 'd'], 3)
# ['d', 'b', 'c']

arischow

# build wheels
FROM python:3.7.9-buster as builder

ENV PYTHONFAULTHANDLER=1 \
    PYTHONUNBUFFERED=1 \
    PYTHONHASHSEED=random \
    # pip:
    PIP_NO_CACHE_DIR=yes \
    PIP_DISABLE_PIP_VERSION_CHECK=on \
    PIP_DEFAULT_TIMEOUT=100