![]() ![]() I noticed that you had used (also pointed out in comments), list as the name of a variable. This is an excellent answer to the question, "What is an expression in Python?". Just to clarify, the expression does not contain an equals symbol. In python, any value (integer, float, char, etc) or any object is an expression. So when you iterate over a string, each item will be a character. #Python list comprehension codeInterestingly, a String object is also iterable. Python is famous for allowing you to write code that’s elegant, easy to write, and almost as easy to read as plain English. ![]() In python, any object that implements the _next_() method is an iterable.įor example, List objects are iterables. Reference to complete documentation.īasic usage. Let's understand the syntax for Python List Comprehensions using a few examples. Here is a complete list of all builins as of python 3.9.6: I am also pointing out that you shouldn't use built in methods(such as List) as variable names because when you do you overide them which will bar you from using that method in the future. Your list comprehension can also be written as: my_list = List comprehension expressions use usual loops ( for, while and repeat ) and usual if as list. Since a strings is an iterable of characters you can do this: my_list = Package provides Python-style list comprehensions for R. This will have the same effect: for item in my_list: Another thing to note is that a string is an iterable ( lists, tuples, sets, dictionaries, numpy arrays) concatenating characters so it can be iterated over like a list. Python list comprehensions are for loops executed in a list to generate a new list.The reason python list comprehensions are evaluated backward from or right to left is because usually anything inside a bracket(, , () ) in python is executed from right to left with just a few exeptions. ![]()
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