Apr 11, 2011 · Agree with @Bogdan. This answer creates a string in which the list elements are joined together with no whitespace or comma in between. You can use ', '.join(list1) to join the …

Dec 3, 2016 · A list of lists named xss can be flattened using a nested list comprehension: flat_list = [ x for xs in xss for x in xs ] The above is equivalent to: flat_list = [] for xs in xss: for x in xs: …

Sep 20, 2010 · List slicing is quite flexible as it allows to replace a range of entries in a list with a range of ...

Sep 9, 2019 · tolist() is a method of NumPy arrays that returns a list representation of the array. to_list() is a method of Pandas dataframes that returns a list representation of the dataframe. …

Sep 14, 2015 · 1. A list is used as if it were a dictionary 1.1. Index a list as if it was a dictionary. This case commonly occurs when a json object is converted into a Python object but there's a …

Dec 2, 2013 · writelines() needs a list of strings with line separators appended to them but your code is only giving it a list of integers. To make it work you'd need to use something like this: …

Jan 12, 2009 · Using e.g. List<Point> list, it would be necessary to instead say Point temp=list[3]; temp.x+=q; list[3]=temp;. It would be helpful if List<T> had a method Update<TP>(int index, …

Another alternative: you can check if an item is in a list with if item in list:, but this is order O(n). If you are dealing with big lists of items and all you need to know is whether something is a …

For Windows 10, I think this is what you are looking for a list of available installed Pythons. This is different from a list of packages as you can see below. Also, on Ubuntu 20.04, I think the …

Apr 4, 2009 · For one-level flatten, if you care about speed, this is faster than any of the previous answers under all conditions I tried.