How to indent Python list-comprehensions?

Question

List comprehensions can be useful in certain situations, but they can also be rather horrible to read.. As a slightly exaggerated example, how would you indent the following?

Answer 1

You should not use a list comprehension for that.

List comprehensions are an awesome feature, but they are meant to be shortcuts, not regular code.

For such a long snippet, you should use ordinary blocs :

allUuids = []
for x in self.db.query(schema.allPostsUuid).execute(timeout = 20) :
    if x.type == "post" and x.deleted is not False :
        allUuids.append(x.id)

Exactly the same behavior, much more readable. Guido would be proud of you :-)