wetterdienst 0.20.2

Open weather data for humans

Wetterdienst - Open weather data for humans

“Three things are (almost) infinite: the universe, human stupidity and the temperature time series of Hohenpeissenberg I got with the help of wetterdienst; and I’m not sure about the universe.” - Albert Einstein

Overview

Introduction

Welcome to Wetterdienst, your friendly weather service library for Python.

We are a group of like-minded people trying to make access to weather data in Python feel like a warm summer breeze, similar to other projects like rdwd for the R language, which originally drew our interest in this project. Our long-term goal is to provide access to multiple weather services as well as other related agencies such as river measurements. With wetterdienst we try to use modern Python technologies all over the place. The library is based on pandas across the board, uses Poetry for package administration and GitHub Actions for all things CI. Our users are an important part of the development as we are not currently using the data we are providing and only implement what we think would be the best. Therefore contributions and feedback whether it be data related or library related are very welcome! Just hand in a PR or Issue if you think we should include a new feature or data source.

Acknowledgements

We want to acknowledge all environmental agencies which provide their data open and free of charge first and foremost for the sake of endless research possibilities.

We want to acknowledge Jetbrains and their open source team for providing us with licenses for Pycharm Pro, which we are using for the development.

We want to acknowledge all contributors for being part of the improvements to this library that make it better and better every day.

Coverage

DWD (Deutscher Wetterdienst / German Weather Service / Germany)

• Historical Weather Observations

  • Historical (last ~300 years), recent (500 days to yesterday), now (yesterday up to last hour)

  • Every minute to yearly resolution

  • Time series of stations in Germany

• Mosmix - statistical optimized scalar forecasts extracted from weather models

  • Point forecast

  • 5400 stations worldwide

  • Both MOSMIX-L and MOSMIX-S is supported

  • Up to 115 parameters

• Radar

  • 16 locations in Germany

  • All of Composite, Radolan, Radvor, Sites and Radolan_CDC

  • Radolan: calibrated radar precipitation

  • Radvor: radar precipitation forecast

ECCC (Environnement et Changement Climatique Canada / Environment and Climate Change Canada / Canada)

• Historical Weather Observations

  • Historical (last ~180 years)

  • Hourly, daily, monthly, (annual) resolution

  • Time series of stations in Canada

To get better insight on which data we have currently made available and under which license those are published take a look at the data section.

Features

• API(s) for stations (metadata) and values

• Get station(s) nearby a selected location

• Define your request by arguments such as parameter, period, resolution, start date, end date

• Command line interface

• Web-API via FastAPI

• Run SQL queries on the results

• Export results to databases and other data sinks

• Public Docker image

Setup

wetterdienst can be used by either installing it on your workstation or within a Docker container.

Native

Via PyPi (standard):

pip install wetterdienst

Via Github (most recent):

pip install git+https://github.com/earthobservations/wetterdienst

There are some extras available for wetterdienst. Use them like:

pip install wetterdienst[http,sql]

• docs: Install the Sphinx documentation generator.

• ipython: Install iPython stack.

• export: Install openpyxl for Excel export and pyarrow for writing files in Feather- and Parquet-format.

• http: Install HTTP API prerequisites.

• sql: Install DuckDB for querying data using SQL.

• duckdb: Install support for DuckDB.

• influxdb: Install support for InfluxDB.

• cratedb: Install support for CrateDB.

• mysql: Install support for MySQL.

• postgresql: Install support for PostgreSQL.

In order to check the installation, invoke:

wetterdienst --help

Docker

Docker images for each stable release will get pushed to GitHub Container Registry.

There are images in two variants, wetterdienst-standard and wetterdienst-full.

wetterdienst-standard will contain a minimum set of 3rd-party packages, while wetterdienst-full will try to serve a full environment by also including packages like GDAL and wradlib.

Pull the Docker image:

docker pull ghcr.io/earthobservations/wetterdienst-standard

Library

Use the latest stable version of wetterdienst:

$ docker run -ti ghcr.io/earthobservations/wetterdienst-standard
Python 3.8.5 (default, Sep 10 2020, 16:58:22)
[GCC 8.3.0] on linux

import wetterdienst
wetterdienst.__version__

Command line script

The wetterdienst command is also available:

# Make an alias to use it conveniently from your shell.
alias wetterdienst='docker run -ti ghcr.io/earthobservations/wetterdienst-standard wetterdienst'

wetterdienst --version
wetterdienst --help

Example

Acquisition of historical data for specific stations using wetterdienst as library:

Load required request class:

>>> import pandas as pd
>>> pd.set_option('max_columns', 8)
>>> from wetterdienst.provider.dwd.observation import DwdObservationRequest

Alternatively, though without argument/type hinting:

>>> from wetterdienst import Wetterdienst
>>> API = Wetterdienst("dwd", "observation")

Get data:

>>> request = DwdObservationRequest(
...    parameter=["climate_summary"],
...    resolution="daily",
...    start_date="1990-01-01",  # if not given timezone defaulted to UTC
...    end_date="2020-01-01",  # if not given timezone defaulted to UTC
...    tidy=True,  # default, tidy data
...    humanize=True,  # default, humanized parameters
...    si_units=True  # default, convert values to SI units
... ).filter_by_station_id(station_id=(1048, 4411))
>>> request.df.head()  # station list
     station_id                 from_date                   to_date  height  \
209      01048 1934-01-01 00:00:00+00:00 ... 00:00:00+00:00   228.0
818      04411 1979-12-01 00:00:00+00:00 ... 00:00:00+00:00   155.0
<BLANKLINE>
     latitude  longitude                    name    state
209   51.1278    13.7543       Dresden-Klotzsche  Sachsen
818   49.9195     8.9671  Schaafheim-Schlierbach   Hessen

>>> request.values.all().df.head()  # values
  station_id          dataset      parameter                      date  value  \
0      01048  climate_summary  wind_gust_max 1990-01-01 00:00:00+00:00    NaN
1      01048  climate_summary  wind_gust_max 1990-01-02 00:00:00+00:00    NaN
2      01048  climate_summary  wind_gust_max 1990-01-03 00:00:00+00:00    5.0
3      01048  climate_summary  wind_gust_max 1990-01-04 00:00:00+00:00    9.0
4      01048  climate_summary  wind_gust_max 1990-01-05 00:00:00+00:00    7.0
<BLANKLINE>
   quality
0      NaN
1      NaN
2     10.0
3     10.0
4     10.0

Receiving of stations for defined parameters using the wetterdienst client:

# Get list of all stations for daily climate summary data in JSON format
wetterdienst dwd observations stations --parameter=kl --resolution=daily --period=recent

# Get daily climate summary data for specific stations
wetterdienst dwd observations values --station=1048,4411 --parameter=kl --resolution=daily --period=recent

Further examples (code samples) can be found in the examples folder.

Documentation

We strongly recommend reading the full documentation, which will be updated continuously as we make progress with this library:

https://wetterdienst.readthedocs.io/

For the whole functionality, check out the Wetterdienst API section of our documentation, which will be constantly updated. To stay up to date with the development, take a look at the changelog. Also, don’t miss out our examples.

Data license

Licenses of the available data can be found in our documentation at the data license section. Licenses and usage requirements may differ so check this out before including the data in your project to be sure to fulfill copyright issues beforehand.

Contribution

There are different ways in which you can contribute to this library:

• by handing in a PR which describes the feature/issue that was solved including tests for newly added features

• by using our library and reporting bugs to us either by mail or by creating a new Issue

• by letting us know either via issue or discussion what function or data source we may include into this library describing possible solutions or acquisition methods/endpoints/APIs

Development

1. Clone the library and install the environment.

   This setup procedure will outline how to install the library and the minimum dependencies required to run the whole test suite. If, for some reason, you are not available to install all the packages, just leave out some of the “extras” dependency tags.

git clone https://github.com/earthobservations/wetterdienst
cd wetterdienst

# Prerequisites
brew install --cask firefox
brew install git python geckodriver

# Option 1: Basic
git clone https://github.com/earthobservations/wetterdienst
cd wetterdienst
python3 -m venv .venv
source .venv/bin/activate
pip install --requirement=requirements.txt
python setup.py develop

# (Option 2: Install package with extras)
pip install ".[sql,export,restapi,explorer]"

# Option 3: Install package with extras using poetry.
poetry install --extras=sql --extras=export --extras=restapi --extras=explorer
poetry shell

2. For running the whole test suite, you will need to have Firefox and geckodriver installed on your machine. Install them like:

   # macOS
   brew install --cask firefox
   brew install geckodriver
   
   # Other OS
   # You can also get installers and/or release archives for Linux, macOS
   # and Windows at
   #
   # - https://www.mozilla.org/en-US/firefox/new/
   # - https://github.com/mozilla/geckodriver/releases

   If this does not work for some reason and you would like to skip ui-related tests on your machine, please invoke the test suite with:

   poe test -m "not ui"

3. Edit the source code, add corresponding tests and documentation for your changes. While editing, you might want to continuously run the test suite by invoking:

   poe test

   In order to run only specific tests, invoke:

   # Run tests by module name or function name.
   poe test -k test_cli
   
   # Run tests by tags.
   poe test -m "not (remote or slow)"

4. Before committing your changes, please als run those steps in order to make the patch adhere to the coding standards used here.

poe format  # black code formatting
poe lint    # lint checking
poe export  # export of requirements (for Github Dependency Graph)

5. Push your changes and submit them as pull request

   Thank you in advance!

Note

If you need to extend the list of package dependencies, invoke:

# Add package to runtime dependencies.
poetry add new-package

# Add package to development dependencies.
poetry add --dev new-package

Known Issues

MAC ARM64 (M1)

You need to install pandas, numpy and scipy as follows before continuing with the regular setup:

pip install pandas --no-use-pep517
pip install numpy --no-use-pep517
pip install --no-binary :all: --no-use-pep517 scipy

Further additional libraries are affected and have to be installed in a similar manner:

# SQL related
brew install postgresql
brew link openssl (and export ENVS as given)
pip install psycopg2-binary --no-use-pep517

Furthermore as h5py is currently bound to versions of numpy that conflict with the ARM64 ready libraries, h5py itself as well as wradlib are not available for users with that architecture!

LINUX ARM (Raspberry Pi)

Running wetterdienst on Raspberry Pi, you need to install numpy and lxml prior to installing wetterdienst running the following lines:

sudo apt-get install libatlas-base-dev
sudo apt-get install python3-lxml

Important Links

Wetterdienst API

Changelog