What does [:-1] mean/do in python? - Stack Overflow
Mar 20, 2013 · Working on a python assignment and was curious as to what [:-1] means in the context of the following code: instructions = f.readline()[:-1] Have searched on here on S.O. …
slice - How slicing in Python works - Stack Overflow
So, in theory, when you use "abcdef" [::-1] it should be transformed to "abcdef" [0:6:-1], but these two expressions does not get the same output. I feel that something is missing in python …
python - What does -1 mean in numpy reshape? - Stack Overflow
Sep 9, 2013 · The criterion to satisfy for providing the new shape is that 'The new shape should be compatible with the original shape' numpy allow us to give one of new shape parameter as …
Meaning of list[-1] in Python - Stack Overflow
I have a piece of code here that is supposed to return the least common element in a list of elements, ordered by commonality: def getSingle(arr): from collections import Counter c = …
Is there a "not equal" operator in Python? - Stack Overflow
Jun 16, 2012 · 32 There's the != (not equal) operator that returns True when two values differ, though be careful with the types because "1" != 1. This will always return True and "1" == 1 will …
How do I concatenate two lists in Python? - Stack Overflow
404 How do I concatenate two lists in Python? As of 3.9, these are the most popular stdlib methods for concatenating two (or more) lists in Python. ... * A solution will qualify as a …
How to fix "SyntaxWarning: invalid escape sequence" in Python?
I use the following prompt successfully on https://duck.ai to write a script: write Python program using libcst to automatically add r to docstrings that would raise syntax warning (invalid escape …
Python or Python3. What is the difference? - Stack Overflow
Nov 12, 2020 · What is the difference between the following commands: python setup.py and python3 setup.py What if I only have python3.6 installed? python and python3 would do the …
How to know what python version a package is compatible with
Mar 14, 2021 · For example, using this process, you can deduce that numpy 1.19.5 is the latest version to support Python 3.6, and numpy 1.16.6 is the latest version to support Python 2.7. At …
python - How can I access the index value in a 'for' loop? - Stack …
1364 Using a for loop, how do I access the loop index, from 1 to 5 in this case? Use enumerate to get the index with the element as you iterate: