What is the difference between list and list [:] in python?
Nov 2, 2010 · When reading, list is a reference to the original list, and list[:] shallow-copies the list. When assigning, list (re)binds the name and list[:] slice-assigns, replacing what was previously in the list. …
slice - How slicing in Python works - Stack Overflow
The first way works for a list or a string; the second way only works for a list, because slice assignment isn't allowed for strings. Other than that I think the only difference is speed: it looks like it's a little …
Python: list of lists - Stack Overflow
The first, [:], is creating a slice (normally often used for getting just part of a list), which happens to contain the entire list, and thus is effectively a copy of the list. The second, list(), is using the actual …
How to group dataframe rows into list in pandas groupby
Given a dataframe, I want to groupby the first column and get second column as lists in rows, so that a dataframe like: a b A 1 A 2 B 5 B 5 B 4 C 6 becomes A [1,2] B [5,5,4] C [6] How do I do this?
Certified models list - ChromeOS Flex Help - Google Help
Oct 7, 2025 · To ensure a consistent and high-quality experience, Google individually certifies and maintains a list of models that you can use with ChromeOS Flex. Model status Certified —Models …
.net - Creating a List of Lists in C# - Stack Overflow
Feb 25, 2015 · A list of lists would essentially represent a tree structure, where each branch would constitute the same type as its parent, and its leaf nodes would represent values.
Most efficient way to find if a value exists within a C# List
Apr 17, 2013 · In C# if I have a List of type bool. What is the fastest way to determine if the list contains a true value? I don’t need to know how many or where the true value is. I just need to know if one e...
join list of lists in python - Stack Overflow
Apr 4, 2009 · Is the a short syntax for joining a list of lists into a single list ( or iterator) in python? For example I have a list as follows and I want to iterate over a,b and c.
How do I subtract one list from another? - Stack Overflow
If you're trying to, e.g., subtract a list of dicts from another list of dicts, but the list to subtract is large, what do you do? If you can decorate your values in some way that they're hashable, that solves the …
Google Sheets function list - Google Docs Editors Help
Google Sheets supports cell formulas typically found in most desktop spreadsheet packages. Functions can be used to create formulas that manipulate data and calculate strings and numbers. Here's a list …