Python Morsels

Giving life-long learners a low-stress way to hone their #Python skills. 🐍🍪 Write beautiful code. ✨ Made by @treyhunner 💖

[Python Morsels @PythonMorsels]

Python Morsels gives professional developers a low-stress way to hone their Python skills, through weekly screencasts and exercises. 🐍🍪

It's not a course. And it's not for complete beginners.

Try it out: https://t.co/ylveRTs3Tm

More details 👇
https://t.co/cOaB9A8kOY

[Trey Hunner @treyhunner]

Looking for an excuse to deepen your #Python skills?

I made @PythonMorsels for you.

It's not an Intro to Python course. It's both not a course & includes topics well beyond introductory Python.

Don't think "tennis class". Think "weekly tennis practice". 🎾 But for Python! 🐍

[Python Morsels @PythonMorsels]

"A yield statement turns a regular function into a generator function." #Python

https://t.co/VC1kpPy9ot

[Python Morsels @PythonMorsels]

You'll almost always see tuple unpacking used whenever enumerate is used.

for n, fruit in enumerate(favorite_fruits, start=1):
print(n, fruit)

#Python

https://t.co/s1fDQDtkgF

[Python Morsels @PythonMorsels]

You don't need third-party libraries to read CSV files in #Python! Python's csv module includes helper functions for reading CSV files, tab-delimited files, and other delimited data files. 👀💻🔍

https://t.co/Rny3bJv3h4

[Python Morsels @PythonMorsels]

"When we call this generator function, it doesn't actually run the code in that function!" 🤯 #Python

https://t.co/iaFc8opnQi

[Python Morsels @PythonMorsels]

"When we loop over a csv.reader object, the reader will loop over the file object that we originally gave it and convert each line in our file to a list of strings." 🔄💱 #Python

https://t.co/Rny3bJv3h4

[Python Morsels @PythonMorsels]

"We can only tell it's a generator function by the presence of a yield statement." #Python

https://t.co/VC1kpPy9ot

[Python Morsels @PythonMorsels]

"Creating a singleton class might seem a little bit misleading to someone using this class." 😖 #Python

https://t.co/CdzeJXElkX

[Python Morsels @PythonMorsels]

"Note that csv.reader doesn't know or care about the headers in our file: it treats every row equally." #Python

https://t.co/Rny3bJv3h4

[Python Morsels @PythonMorsels]

"The yield statement is what turns a function into a generator function." 🔻 #Python

https://t.co/iaFc8opnQi

[Python Morsels @PythonMorsels]

"We've exhausted our generator object; we've fully consumed all the items within it." 🏁 #Python

https://t.co/iaFc8opnQi

[Python Morsels @PythonMorsels]

"Unlike lists, generator objects don't have a length" #Python

https://t.co/NuxZwW91wO

[Python Morsels @PythonMorsels]

If something is important, it deserves a name. #Python's for loops names the items themselves, not indexes.

https://t.co/57ciUT7p4o

[Python Morsels @PythonMorsels]

"For a very simple command-line program, you could just rely on #Python to close the file automatically when your Python program exits."

https://t.co/kaY154UV3n

[Python Morsels @PythonMorsels]

"In #Python, you can customize what happens when you ask objects whether they're equal to each other." 🐍🟰

https://t.co/5hWaEviOt9

[Python Morsels @PythonMorsels]

If we want to start counting at a different number, we can set the start keyword argument when calling enumerate.

for n, fruit in enumerate(favorite_fruits, start=1):
print(n, fruit)

#Python

https://t.co/s1fDQDtkgF

[Python Morsels @PythonMorsels]

The built-in str function actually calls the __str__ method on the object that we give it. #Python

https://t.co/p9ChRPCaVp

[Python Morsels @PythonMorsels]

"If you'd prefer to think in terms of the headers in your file, rather than in terms of the indexes of each data column, you could use csv.DictReader instead of csv.reader." 📚 #Python

https://t.co/Rny3bJv3h4

[Python Morsels @PythonMorsels]

"Just like with reader objects, we can loop over DictReader objects to get the rows within our file. But unlike reader objects, instead of getting back lists representing each row, we'll get back dictionaries." #Python

https://t.co/Rny3bJv3h4

[Python Morsels @PythonMorsels]

"A singleton class is a class that only allows creating one instance of itself." 1️⃣ #Python

https://t.co/CdzeJXElkX

[Python Morsels @PythonMorsels]

"Turn a regular function into a generator function by replacing append calls with yield statements." 🐍 #Python

https://t.co/5MgLLRq7gC