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keys = ['a', 'b', 'c']
values = [1, 2, 3]
dictionary = dict(zip(keys, values))

#result looks like this {'a': 1, 'b': 2, 'c': 3}

# ordered dictionary
import collections
keys = ['a', 'b', 'c']
values = [1, 2, 3]

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CREATE OR REPLACE FUNCTION ST_CreateFishnet(
        nrow integer, ncol integer,
        xsize float8, ysize float8,
        x0 float8 DEFAULT 0, y0 float8 DEFAULT 0,
        OUT "row" integer, OUT col integer,
        OUT geom geometry)
    RETURNS SETOF record AS
$$
SELECT i + 1 AS row, j + 1 AS col, ST_Translate(cell, j * $3 + $5, i * $4 + $6) AS geom
FROM generate_series(0, $1 - 1) AS i,

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import shapefile
import shapely

#Load the shapefile of polygons and convert it to shapely polygon objects
polygons_sf = shapefile.Reader("C:/PolygonShapeFile.shp")
polygon_shapes = polygons_sf.shapes()
polygon_points = [q.points for q in polygon_shapes ]
from shapely.geometry import Polygon
polygons = [Polygon(q) for q in polygon_points]

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import ftplib
import os
import sys
import subprocess
from optparse import OptionParser
from datetime import datetime


DB_USER = 'databaseuser'
DB_NAME = 'databasename'

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import os
from os.path import isfile, join
import shutil

my_path = "/home/username/Pictures"
file_types = ('.JPG', '.jpg', '.AVI')
year = '2010'
destination_folder = "/home/username/Pictures/final_2010"

for root, dirs, files in os.walk(my_path):

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class BoundingBox(coordinate_list):
    """
    Return a 2D bounding box from a set of points
    Example input:  mypoints = [(0,2),(3,4),(5,6)]
    Example Usage: BoundingBox(mypoints)
    Example Usage: bbox = BoundingBox(mypoints)
    bbox.width
    bbox.height
    bbox.centroid
    """

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--QGIS 3 Ubuntu 16.04

sudo sh -c 'echo "deb https://qgis.org/ubuntugis  xenial main" >> /etc/apt/sources.list'
sudo sh -c 'echo "deb-src https://qgis.org/ubuntugis xenial main" >> /etc/apt/sources.list'
sudo add-apt-repository ppa:ubuntugis/ubuntugis-unstable

wget -O - https://qgis.org/downloads/qgis-2017.gpg.key | gpg --import
gpg --fingerprint CAEB3DC3BDF7FB45
gpg --export --armor CAEB3DC3BDF7FB45 | sudo apt-key add -

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# source: https://dev.to/mariamxl
# https://dev.to/mariamxl/dijkstras-algorithm-in-python-algorithms-for-beginners-dkc

from collections import deque, namedtuple


# we'll use infinity as a default distance to nodes.
inf = float('inf')
Edge = namedtuple('Edge', 'start, end, cost')

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// using font awesome 5 free version
var faFlagSolidStyle = new ol.style.Style({
  text: new ol.style.Text({
    text: '\uf024', // fas flag solid
    scale: 1,
    font: 'normal 18px FontAwesome',
    offsety: -30,
    offsetx: -10,
    fill: new ol.style.Fill({color: 'black'}),
  })

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<filter>
  <filter-name>CorsFilter</filter-name>
  <filter-class>org.apache.catalina.filters.CorsFilter</filter-class>
  <init-param>
    <param-name>cors.allowed.origins</param-name>
    <param-value>*</param-value>
  </init-param>
  <init-param>
    <param-name>cors.allowed.methods</param-name>
    <param-value>GET,POST,HEAD,OPTIONS,PUT</param-value>