Python slicing out of bounds never crashes
Indexing data[100] on a 3-element list crashes with IndexError, but slicing data[100:] returns an empty list with no error. Python silently clamps slice indices to the valid range. You can slice with absurdly large numbers and Python just gives you what it can.
#pythonweirdestlogic #pythonweirdbehavior #pythongotcha #pythontrick #pythonmindblown #pythonunexpected #pythonwtf #pythonhiddenfeature #pythonco...
This Python function ignores try and except and always returns finally
When try, except, and finally all have return statements, finally always wins. Python guarantees finally blocks execute no matter what. The return in finally overwrites whatever try was about to return. Three return statements, only one actually returns.
#pythonweirdestlogic #pythonweirdbehavior #pythongotcha #pythontrick #pythonmindblown #pythonunexpected #pythonwtf #pythonhi...
Important PSA For @jack !!!
`os.truncate(path, length)` truncates THE FILE, not the path string 😳 (with no warning)
Thank goodness you were in a venv!
😅
It is often useful to make a #copy of a given list before performing operations that would mutate the elements.
When you make a shallow copy of an existing list, you create a new pointer to a new list object that points to the same old elements. (It saves memory.)
On the other hand, if you make a deep copy, then you create a completely new copy of the original list.
In other words: https://realpython.com/python-mutable-vs-immutable-types/#making-copies-of-lists
#learning #objects #python #dev #CS #DataScience #memory #dataDev
Python Peak
Jack Linke 🦄
Eric Maugendre about data