© Valentina Porcu 2018
Valentina PorcuPython for Data Mining Quick Syntax Referencehttps://doi.org/10.1007/978-1-4842-4113-4_5

5. Conditional Instructions and Writing Functions

Valentina Porcu1 
Nuoro, Italy

In this chapter we explore the ways to create a function and a loop in Python. We may need to create a loop to iterate an action over a list, or to create a function to extract some cases from a dataset. Writing functions is very important to automating data analysis.

Conditional Instructions

Conditional instructions are structures used to manage conditions when we create a function. Depending on certain values or the results of an operation, we implement different actions on our data using the following conditional instructions.
  • if

  • elif

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