Build Dictionary in Python Loop – List and Dictionary Comprehensions Question: I’m playing with some loops in python. I am quite familiar with using the “for” loop: for x in y: do something You can also create a simple list using a loop: i = [] for x in y: i.append(x) and then I recently …
Nested dictionary comprehension python Question: I’m having trouble understanding nested dictionary comprehensions in Python 3. The result I’m getting from the example below outputs the correct structure without error, but only includes one of the inner key: value pairs. I haven’t found an example of a nested dictionary comprehension like this; Googling “nested dictionary comprehension …
Why is there no tuple comprehension in Python? Question: As we all know, there’s list comprehension, like [i for i in [1, 2, 3, 4]] and there is dictionary comprehension, like {i:j for i, j in {1: ‘a’, 2: ‘b’}.items()} but (i for i in (1, 2, 3)) will end up in a generator, not …
How can I use if/else in a dictionary comprehension? Question: Does there exist a way in Python 2.7+ to make something like the following? { something_if_true if condition else something_if_false for key, value in dict_.items() } I know you can make anything with just ‘if’: { something_if_true for key, value in dict_.items() if condition} Asked By: …
Create a dictionary with comprehension Question: Can I use list comprehension syntax to create a dictionary? For example, by iterating over pairs of keys and values: d = {… for k, v in zip(keys, values)} Asked By: flybywire || Source Answers: Use a dict comprehension (Python 2.7 and later): {key: value for key, value in …
