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Functional Python Programming - Second Edition
book

Functional Python Programming - Second Edition

by Steven F. Lott
April 2018
Intermediate to advanced content levelIntermediate to advanced
408 pages
10h 42m
English
Packt Publishing
Content preview from Functional Python Programming - Second Edition

Using Python lambda forms

In many cases, the definition of a helper function seems to requires too much code. Often, we can digest the key function to a single expression. It can seem wasteful to have to write both def and return statements to wrap a single expression.

Python offers the lambda form as a way to simplify using higher-order functions. A lambda form allows us to define a small, anonymous function. The function's body is limited to a single expression.

The following is an example of using a simple lambda expression as the key:

long = max(trip, key=lambda leg: leg[2])short = min(trip, key=lambda leg: leg[2])  

The lambda we've used will be given an item from the sequence; in this case, each leg three tuple will be given to the ...

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Functional Python Programming - Third Edition

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Publisher Resources

ISBN: 9781788627061Supplemental Content