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Web scraping with Selenium Webdriver and MongoDB, deployed to Heroku
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mars_app
.gitignore app deployed to heroku Jul 10, 2018
Procfile app deployed to heroku Jul 10, 2018
README.md Readme Jul 10, 2018
requirements.txt

README.md

App is using Selenium chromedriver and Mongolab database, successfully deployed to Heroku.

Below are the steps:

Mission to Mars

The goal is to build a web application that scrapes various websites for data related to the Mission to Mars and displays the information in a single HTML page.

NASA Mars News

  • Scrape the NASA Mars News Site and collect the latest News Title and Paragragh Text. Assign the text to variables that you can reference later.
# Example:
news_title = "NASA's Next Mars Mission to Investigate Interior of Red Planet"

news_p = "Preparation of NASA's next spacecraft to Mars, InSight, has ramped up this summer, on course for launch next May from Vandenberg Air Force Base in central California -- the first interplanetary launch in history from America's West Coast."

JPL Mars Space Images - Featured Image

  • Visit the url for JPL's Featured Space Image here.

  • Use splinter to navigate the site and find the image url for the current Featured Mars Image and assign the url string to a variable called featured_image_url.

  • Make sure to find the image url to the full size .jpg image.

  • Make sure to save a complete url string for this image.

# Example:
featured_image_url = 'https://www.jpl.nasa.gov/spaceimages/images/largesize/PIA16225_hires.jpg'

Mars Weather

  • Visit the Mars Weather twitter account here and scrape the latest Mars weather tweet from the page. Save the tweet text for the weather report as a variable called mars_weather.
# Example:
mars_weather = 'Sol 1801 (Aug 30, 2017), Sunny, high -21C/-5F, low -80C/-112F, pressure at 8.82 hPa, daylight 06:09-17:55'

Mars Facts

  • Visit the Mars Facts webpage here and use Pandas to scrape the table containing facts about the planet including Diameter, Mass, etc.

  • Use Pandas to convert the data to a HTML table string.

Mars Hemisperes

  • Visit the USGS Astrogeology site here to obtain high resolution images for each of Mar's hemispheres.

  • You will need to click each of the links to the hemispheres in order to find the image url to the full resolution image.

  • Save both the image url string for the full resolution hemipshere image, and the Hemisphere title containing the hemisphere name. Use a Python dictionary to store the data using the keys img_url and title.

  • Append the dictionary with the image url string and the hemisphere title to a list. This list will contain one dictionary for each hemisphere.

# Example:
hemisphere_image_urls = [
    {"title": "Valles Marineris Hemisphere", "img_url": "..."},
    {"title": "Cerberus Hemisphere", "img_url": "..."},
    {"title": "Schiaparelli Hemisphere", "img_url": "..."},
    {"title": "Syrtis Major Hemisphere", "img_url": "..."},
]

Step 2 - MongoDB and Flask Application

Use MongoDB with Flask templating to create a new HTML page that displays all of the information that was scraped from the URLs above.

  • Start by converting your Jupyter notebook into a Python script called scrape_mars.py with a function called scrape that will execute all of your scraping code from above and return one Python dictionary containing all of the scraped data.

  • Next, create a route called /scrape that will import your scrape_mars.py script and call your scrape function.

    • Store the return value in Mongo as a Python dictionary.
  • Create a root route / that will query your Mongo database and pass the mars data into an HTML template to display the data.

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