Calculate Keyword Growth Using Google Trends, Python, and the Slope Formula

During a presentation I gave at Distilled’s SearchLove Boston conference in early May, I advocated that people use the slope formula and Google Trends data to determine if interest keywords have grown over time or if they are slipping away into searcher oblivion.

The only problem with this, is that unfortunately Google doesn’t provide an official API for Google Trends, so we need some Python wizardry to do this in bulk.
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