ali wangara

Kenyan🇰🇪🇰🇪

[Mokeira @mokeira_hh]

Be fr. Do you really think Sifuna & team are incapable of putting together a manifesto, an impressive one at that?

Constitutionalism is not a fallback position. It is a deliberate distillation of much broader objectives into a principle that is easily understood and widely

[ali wangara @aliwangara4]

@AliWangarah 😂😂

[ali wangara @aliwangara4]

Every exception is a class, so except AppError also catches ValidationError if it inherits from it. Clauses are checked in order and the first match wins, same as MRO. Put specific ones before general ones.

[ali wangara @aliwangara4]

Every exception is a class, so except AppError also catches ValidationError if it inherits from it. Clauses are checked in order and the first match wins, same as MRO. Put specific ones before general ones.

[ali wangara @aliwangara4]

CPython internals: exceptions.

try/except/else/finally: else runs only if no error happened, and unlike code at the end of try, it isn’t covered by the except clauses. finally runs no matter what.

#Python #CPython #100DaysOfCode

[ali wangara @aliwangara4]

so c.area runs it with no parentheses and always reflects the current data. With no setter, assigning to it raises AttributeError.
@classmethod passes the class itself as cls, handy for alternate constructors. @staticmethod passes nothing, so it’s just a plain function

[ali wangara @aliwangara4]

CPython internals: @property, @classmethod, @staticmethod.

These are decorators built into Python. @property replaces a method with a property object (area = property(area))
#Python #CPython #100DaysOfCode

[ali wangara @aliwangara4]

CPython internals: @property, @classmethod, @staticmethod.

These are decorators built into Python. @property replaces a method with a property object (area = property(area))
#Python #CPython #100DaysOfCode

[ali wangara @aliwangara4]

CPython internals: @contextmanager.

You can write a context manager as a generator instead of a class. Code before yield plays __enter__, the with block runs while the generator is paused, and code after yield plays __exit__.

#Python #CPython #100DaysOfCode

[ali wangara @aliwangara4]

The catch: if the block raises an error, it’s thrown into the generator at the yield, so the code after it never runs. Wrap the yield in try/finally to guarantee cleanup, which a class-based __exit__ gets for free.

[ali wangara @aliwangara4]

CPython internals: @contextmanager.

You can write a context manager as a generator instead of a class. Code before yield plays __enter__, the with block runs while the generator is paused, and code after yield plays __exit__.

#Python #CPython #100DaysOfCode

[ali wangara @aliwangara4]

CPython internals: context managers and the with statement.

with calls __enter__ when the block starts and __exit__ when it ends, whether the block finished normally or raised an error.

#Python #CPython #100DaysOfCode

[ali wangara @aliwangara4]

That’s why with open(...) always closes the file: the file’s own __exit__ does it, at a fixed point you can see in the code.
The part that surprised me is that __exit__ decides what happens to the error. Return False and the error keeps going. Return True and it’s swallowed.

[ali wangara @aliwangara4]

CPython internals: context managers and the with statement.

with calls __enter__ when the block starts and __exit__ when it ends, whether the block finished normally or raised an error.

#Python #CPython #100DaysOfCode

[ali wangara @aliwangara4]

Hello @KenyaPower_Care
@KenyaPower I have raised an issue on you dm

[eng.Kelvin @kelvin_buffalo]

Masaa ni ya kuandika line by line

[Gabu👤🕷️ @callmegitonga]

Mungu sikusema adui nilesema Audi.

[ali wangara @aliwangara4]

@JustLingonberry Interested

[ali wangara @aliwangara4]

UnboundLocalError (it's a compile time scan, not a runtime search), and being precise that print() always uses __str__ once it's defined, not a memory address.

Good to confirm the foundation is solid before building further.

#Python #CPython #100DaysOfCode

[ali wangara @aliwangara4]

Spent today rebuilding everything learned so far in this CPython internals deep dive, from bytecode through multiple inheritance, 15 topics, explained from scratch and proven in code, no notes.

A few soft spots surfaced and got fixed properly: the exact mechanism behind