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- slice - How slicing in Python works - Stack Overflow
Python slicing is a computationally fast way to methodically access parts of your data In my opinion, to be even an intermediate Python programmer, it's one aspect of the language that it is necessary to be familiar with
- python - `from . . . import` vs `import . ` - Stack Overflow
I'm wondering if there's any difference between the code fragment from urllib import request and the fragment import urllib request or if they are interchangeable If they are interchangeable, wh
- What does [:-1] mean do in python? - Stack Overflow
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 and on Google but to no avail
- operators - Python != operation vs is not - Stack Overflow
In a comment on this question, I saw a statement that recommended using result is not None vs result != None What is the difference? And why might one be recommended over the other?
- python - Iterating over a dictionary using a for loop, getting keys . . .
In Python 3, the iteration has to be over an explicit copy of the keys (otherwise it throws a RuntimeError) because my_dict keys() returns a view of the dictionary keys, so any change to my_dict changes the view as well
- python - Find a value in a list - Stack Overflow
In Python 3, filter doesn't return a list, but a generator-like object Finding the first occurrence If you only want the first thing that matches a condition (but you don't know what it is yet), it's fine to use a for loop (possibly using the else clause as well, which is not really well-known) You can also use
- python - How to concatenate (join) items in a list to a single string . . .
For handling a few strings in separate variables, see How do I append one string to another in Python? For the opposite process - creating a list from a string - see How do I split a string into a list of characters? or How do I split a string into a list of words? as appropriate
- python - Find the current directory and files directory - Stack Overflow
How do I determine: the current directory (where I was in the shell when I ran the Python script), and where the Python file I am executing is?
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