Python Generators - Talk at PySthlm meetup #15
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Transcript of Python Generators - Talk at PySthlm meetup #15
Python Generators
PySthlm Meetup #15 – Python Best Practices – Oct 31, 2013
Samuel Lampatwitter.com/smllmp
The “normal” (bad) way
The “normal” (bad) way
New temporary data structures created and kept in memory
== BAD!!!
Using Generator function
Using Generator function
A yield (“return”) for every iteration, so it can
be used immediately without temp data structure
== GOOD!
Using Generator function
A yield (“return”) for every iteration, so it can
be used immediately without temp data structure
== GOOD!
So, this is the generator function
Using Generator function
A yield (“return”) for every iteration, so it can
be used immediately without temp data structure
== GOOD!
So, this is the generator function … which can be
iterated over, like this ...
Using list-comprehension syntax
Using list-comprehension syntax
Here, the generator functionIs defined in one row
Chaining generator functions
Chaining generator functions
Creds and more info:
● David Beazleys Python Generator intro:
→dabeaz.com/generatorsDavid Beazley on twitter: @dabeaz
Thank you!
Samuel LampaG+: gplus.to/samltwitter: @smllmp
Blog: saml.rilspace.org
Developer @ www.uppmax.uu.sewww.farmbio.uu.sewww.rilpartner.se