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
What is the difference between list[1] and list[1:] in Python? By using a : colon in the list index, you are asking for a slice, which is always another list In Python you can assign values to both an individual item in a list, and to a slice of the list
slice - How slicing in Python works - Stack Overflow del my_list[:] (Python 3 gets a list copy and list clear method ) When step is negative, the defaults for start and stop change By default, when the step argument is empty (or None), it is assigned to +1 But you can pass in a negative integer, and the list (or most other standard sliceables) will be sliced from the end to the beginning
pandas dataframe index: to_list () vs tolist () - Stack Overflow Note that the question was about pandas tolist vs to_list pandas DataFrame values returns a numpy array and numpy indeed has only tolist Indeed, if you read the discussion about the issue linked in the accepted answer, numpy's tolink is the reason why pandas used tolink and why they did not deprecate it after introducing to_list
How can I pass a list as a command-line argument with argparse? Don't use quotes on the command line 1 Don't use type=list, as it will return a list of lists This happens because under the hood argparse uses the value of type to coerce each individual given argument you your chosen type, not the aggregate of all arguments You can use type=int (or whatever) to get a list of ints (or whatever)
Most efficient way to find if a value exists within a C# List 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
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
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