7 Day Weather forecast

The module provides a 7 day weather forecast from the Open Weather Map and then converted to am image using quickcharts.io See a full article from PythonHowToProgram

What problem does this solve?

The module will help to return a 7 day weather forecast for a given location either as a dictionary, a chart image file, or a web link with the chart image

How does it do this?

There are three key services that are used for this module:

1. The geopy library to convert a string to lat-long
2. Open Weather Map online service (you can get an API key through a free account in the profile section)
3. Then finally from QuickCharts to convert the time series weather data into a chart

How do you install this?

MCLogger is avaialble through PyPi and you may use pip:

	pip install weatherchart

Or, through git:

	git clone https://github.com/pub12/weatherchart.git

How do you use weatherchart?

The weatherchart library is super easy to use. You need to simply pass the Open Weather API key, a timezone, and then a location string. A URL will be returned of the chart or saved as a file

from weatherchart import WeatherChart

wchart = WeatherChart('<open weather map token>', 'Asia/Hong_Kong')
print( wchart.get_forecast_chart_image_by_loc('Tokyo', 'out_file.jpg' ) )

Class Methods overview

• constructor(self, map_key, tz_location='Asia/Singapore'):

  Constructor must include the Open Weather MAP API key, and also a timezone. The timezone list can be found on the Wiki Timezone page. The reason for the timzone is to ensure the right time period is extract for the next 7 days

• get_full_weather_data(self, lat, long):

  Return a dictionary with weather a full detailed range of data (temperature, min, max, humidity and many more) for next 7 days including today. The location must be provided as a lat long.

• get_forecast_by_location(self, loc_string):

  Return a dictionary with weather data (temperature, min, max, humidity) for next 7 days including today. The location must be provided as a location description (e.g. "Seattle", "New York, New York"). Output is the same as the method get_forecast()

• get_forecast(self, lat, long):

  Return a dictionary with weather data (temperature, min, max, humidity) for next 7 days including today. The location must be provided as a lat long.
  A ditionary will be returned with the following:

  {
      'temp': <float>,
      'temp_min':  <float>,
      'temp_max':  <float>,
      'wind_speed':  <float>,
      'humidity':  <float> 
  }
  

• get_forecast_chart_image_by_loc( self, loc_string, output_file=None):

  This will return an image with a chart showing the 7 day forecast. If a filename is provided then the image will be saved as an image as well (.jpg). Input is a location sring and the function will return a URL string. An example output below:

  7 day forecast for Tokyo, Japan