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#!/bin/python3
# Copy contents of a XSFP music playlist to a target folder
#
# required two arguments: path to xspf file, target path
# requires Python >= 3.8
# 
# author: Markus Konrad <post@mkonrad.net>

import os.path
import sys

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"""
Transfer all GitLab projects from the user authenticated with a supplied private access token (PAT) to a new
namespace (i.e. a group with a group ID).

To generate a PAT, log in to your GitLab account and go to "User settings > Access tokens".

To find out the ID of a group to which you want to transfer the projects, go to the group's page. The group ID is shown
under the title of the group.

Requirements: Python 3 with requests package installed (tested with Python 3.8 and requests 2.27.1).

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"""
Voronoi regions of schools in East Germany.
An example using the geovoronoi package (https://pypi.org/project/geovoronoi/).

Feb. 2021

Markus Konrad <markus.konrad@wzb.eu>
"""

import os

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"""
Sample scripts for blog post "Robust data collection via web scraping and web APIs"
(https://datascience.blog.wzb.eu/2020/12/01/robust-data-collection-via-web-scraping-and-web-apis/).

Script 1. Starting point – baseline (unreliable) web scraping script.

December 2020, Markus Konrad <markus.konrad@wzb.eu>
"""

from datetime import datetime, timedelta

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import numpy as np


def word_cooccurrence(dtm):
    """
    Calculate the co-document frequency (aka word co-occurrence) matrix for a document-term matrix `dtm`, i.e. how often
    each pair of tokens occurs together at least once in the same document.

    :param dtm: (sparse) document-term-matrix of size NxM (N docs, M is vocab size) with raw term counts.
    :return: co-document frequency (aka word co-occurrence) matrix with shape MxM

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def str_multisplit(s, sep):
    """
    Split string `s` by all characters/strings in `sep`.

    :param s: a string to split
    :param sep: sequence or set of characters to use for splitting
    :return: list of split string parts
    """
    if not isinstance(s, (str, bytes)):
        raise ValueError('`s` must be of type `str` or `bytes`')

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# Source for blog post "Zooming in on maps with sf and ggplot2"
# URL: https://datascience.blog.wzb.eu/2019/04/30/zooming-in-on-maps-with-sf-and-ggplot2/
#
# Markus Konrad <markus.konrad@wzb.eu>
# Wissenschaftszentrum Berlin für Sozialforschung
# April 30, 2019
# 

#### world map ####

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# Plot a network graph of nodes with geographic coordinates on a map.
#
# Author: Markus Konrad <markus.konrad@wzb.eu>
# May 2018
#
# This script shows three ways of plotting a network graph on a map.
# The following information should be visualized (with the respective
# aestethics added):
#
# * graph nodes with:

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"""
Runtime optimization through vectorization and parallelization.
Script 3: Parallel and vectorized calculation of haversine distance.

Please note that this might be slower than the single-core vectorized version because of the overhead that is caused
by multiprocessing.

January 2018
Markus Konrad <markus.konrad@wzb.eu>
"""

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# Create a "balloon plot" as alternative to a heatmap with ggplot2
# 
# January 2017
# Author: Markus Konrad <markus.konrad@wzb.eu>, WZB Berlin Social Science Center

library(dplyr)
library(tidyr)
library(ggplot2)

# define the variables that will be displayed in the columns