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- 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 = Counte
- python - if else in a list comprehension - Stack Overflow
Since a list comprehension creates a list, it shouldn't be used if creating a list is not the goal; it shouldn't be used simply to write a one-line for-loop; so refrain from writing [print(x) for x in range(5)] for example
- 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 faster the first way Try it yourself with timeit timeit () or preferably timeit repeat ()
- python - How to convert list to string - Stack Overflow
How can I convert a list to a string using Python?
- How to list all installed packages and their versions in Python?
Is there a way in Python to list all installed packages and their versions? I know I can go inside python Lib site-packages and see what files and directories exist, but I find this very awkward
- What is the difference between list and list [:] in python?
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 Also, don't use list as a name since it shadows the built-in
- TypeError: list indices must be integers or slices, not str
Another common mistake is to initialize a list but try to assign values to it using a key The initialization probably happened dynamically and it's not clear later on that it's in fact a list For example, in the following case, d is initialized as a list but there's an attempt to add a key-value pair to it
- What is the syntax to insert one list into another list in python?
What is the syntax to insert one list into another list in python? [duplicate] Asked 14 years, 10 months ago Modified 6 years, 1 month ago Viewed 349k times
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