#63 We're still on a desktop GUI kick

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Brian #1: A brief tour of Python 3.7 data classes

• a great write-up of the upcoming data classes via Anthony Shaw
• “Data classes are a way of automating the generation of boiler-plate code for classes which store multiple properties. They also carry the benefit of using Python 3’s new type hinting.”
• Default magic methods
  • In the default setting, any dataclass will implement __init__, __repr__, __str__ and __eq__ for you.
  • The __init__ method will have keyword-arguments with the same type annotations that are specified on the class.
  • The __eq__ method will compare all dataclass attributes in order.
  • All fields are declared at the top of the class and type hinting is required.
• Also covered
  • type hinting
  • mutability (and frozen)
  • customizing the fields
  • post-init processing : optional __``*post_init_*``_ will run after the generated _``*_init_*``_
  • inheritance

Michael #2: SQLite [The Databaseology Lectures - CMU Fall 2015]

• Lots of DBs covered here: http://db.cs.cmu.edu/seminar2015/
• SQLite at this YouTube video

Brian #3: dryable : a useful dry-run decorator for python

• short circuit methods within your project during dry runs.
• example shows how to add a command line flag --dry-run.
• The test code is useful for understanding it also.

• Example something.py import dryable

  @dryable.Dryable('foo') def return_something(): return 'something'

test_something.py

from something import return_something
import dryable

def test_normal_return():
    dryable.set(False) 
    assert return_something() == 'something'

def test_dry_return(capsys):
    dryable.set(True) 
    assert return_something() == 'foo'

Michael #4:

• These are some pretty cool examples.
  • https://github.com/victordomingos/PT-Tracking/
  • https://github.com/victordomingos/RepService/
  • https://github.com/victordomingos/ContarDinheiro.py

Brian #5: PEP Explorer - Explore Python Enhancement Proposals

• Cool idea. Might need some work though. I can’t find any accepted PEPs for 3.7, including 557, data classes.
• I’m ok with giving Anthony some shade on this, as we highlighted his writing in the first item.

Michael #6: TKInter Tutorial

• via @likegeeks
• Create your first GUI application
• Create a label and button widgets
• Input and combo boxs, menus, progressbars and more

Our news

Michael

• I built something with Gooey this weekend, it was wonderful.
• Self-serve team purchases and discounts at Talk Python Training