I’ve created a GUI using wxFormBuilder that should allow a user to enter the names of “visitors to a business” into a list and then click one of two buttons to return the most frequent and least frequent visitors to the business. I created an earlier version that, unfortunately, gave me the range of visitors, … Read more
Use enumerate here
Pandas DataFrame columns are Pandas Series when you pull them out, which you can then call x.tolist() on to turn them into a Python list. Alternatively you cast it with list(x). Output:
You can use a list comprehension: The iterator enumerate(my_list) yields pairs (index, item) for each item in the list. Using i, x as loop variable target unpacks these pairs into the index i and the list item x. We filter down to all x that match our criterion, and select the indices i of these elements.
Basically, Python lists are very flexible and can hold completely heterogeneous, arbitrary data, and they can be appended to very efficiently, in amortized constant time. If you need to shrink and grow your list time-efficiently and without hassle, they are the way to go. But they use a lot more space than C arrays, in part because … Read more
How can I convert a set to a list in Python? Using doesn’t work. It gives me:
How do you find the median of a list in Python? The list can be of any size and the numbers are not guaranteed to be in any particular order. If the list contains an even number of elements, the function should return the average of the middle two. Here are some examples (sorted for … Read more
Do-something if <condition>, else do-something else.
You can use the + operator to combine them: Output: