Bringing it all together

1. Bringing it all together

Congrats! So now you're able to write functions

2. What you have learned:

that accept multiple parameters and return multiple values, it is time to see how these learnt skills can be valuable in a Data Science context. In the following exercises, you'll write a function that analyzes a DataFrame of twitter data. The function that you'll write will return a dictionary containing data of how many times each language was used across all the tweets in the DataFrame. We'll see later in this course that we can generalize such a function to count occurrences of any items in a DataFrame column. Let's recap the basic ingredients of a function.

3. Basic ingredients of a function

We have a function header which begins with the keyword def. This is followed by the function name, parameters in parentheses and a colon. We then have the function body, which contains docstrings enclosed in triple quotation marks; docstrings describe what the function does; the rest of the function body performs the computation that the function does; the function body closes with the keyword return, followed by the value or values returned by the function. That's it from me.

4. Let's practice!

Happy function-writing!

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