Python Is Awesome @python_awesome

Tutorials and tips related to #programming in #python #django #flask and more! Joined September 2019

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Raymond Hettinger @raymondh

6 years ago

#Python's f-strings are amazingly fast! f'{s} {t}' # 78.2 ns s + ' ' + t # 104 ns ' '.join((s, t)) # 135 ns '%s %s' % (s, t) # 188 ns '{} {}'.format(s, t) # 283 ns Template('$s $t').substitute(s=s, t=t) # 898 ns

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Raymond Hettinger @raymondh

6 years ago

#Python implementation note: The JSON and ElementTree parsers both intern recurring keys and tags. This gives a nice memory savings when loading from large JSON and XML files.

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Raymond Hettinger @raymondh

6 years ago

Woohoo! #Python 3.8 was just released. And on the same day that PyPI hit 200,000 packages :-) This one really is the best Python ever. Download it now. python.org/downloads/rele…

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Python Visual Studio Code @pythonvscode

6 years ago

🎉The October release of the #Python extension for @code is here! 🎉 Try out native editing of #JupyterNotebook files 📔, a button to run Python files in the terminal ▶, and improvements to the Python Language Server 🐍. Learn more on our blog: devblogs.microsoft.com/python/python-…

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Python Is Awesome @python_awesome

6 years ago

Merging 2 dictionaries in #Python 🐍

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Łukasz Langa moved to 🦋 @llanga

6 years ago

Still performing sanity checks but it looks like WE WILL BE CUTTING THE RELEASE CANDIDATE OF #PYTHON 3.8.0 TODAY! ✨🤠✨

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Python Is Awesome @python_awesome

6 years ago

#comprehensions express the awesomeness of #Python 🐍💖

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Raymond Hettinger @raymondh

6 years ago

#Python 3.8 news: The typing module now makes it possible to annotate non-homogenous dictionaries: >>> class Person(TypedDict): name : str age : int >>> p = Person(name='matthew', age=10) >>> p {'name': 'matthew', 'age': 10}

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TestDriven.io @testdrivenio

6 years ago

Awesome Flask - a curated list of awesome things related to Flask github.com/mjhea0/awesome… #flask #python #webdev

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Raymond Hettinger @raymondh

6 years ago

Interestingly, this also applies to built-in types: >>> class Int(int): pass >>> int.__subclasses__() [<class 'bool'>, <enum 'IntEnum'>, <enum 'IntFlag'>, <class 'sre_constants._NamedIntConstant'>, <class '__main__.Int'>]

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Raymond Hettinger @raymondh

6 years ago

#Python factlet: Each class keeps a list of weak references to its immediate subclasses. >>> class A: pass >>> class B(A): pass >>> class C(A): pass >>> A.__subclasses__() [<class '__main__.B'>, <class '__main__.C'>]