How to add "-> None:" to the end of init functions with Notepad++?

Question

I want to select every __init__ function and add -> None to the end if it does not already exist. For example:

def __init__(self) -> None:

def __init__(self):

def __init__(self, var1, var2):

def __init__(self, var1, var2) -> None:

def __init__(self, 
    var1= 5, 
    var2: int = 4
    var3 = None
    ):

def (self, 
    var1= 5, 
    var2= 4) -> None:

I've figured out that (def __init__\((.*?))(:) seems to select the right lines, but I can't figure out how to make it ignore lines/groups of lines that contain: -> None.

I read here that even though it's implied, it's still recommended by PEP-0484: stackoverflow.com/questions/46779046/… — ProGamerGov
– ProGamerGov, Commented Nov 21, 2020 at 21:27

Wiktor Stribiżew · Accepted Answer · 2020-11-21 21:34:02Z

3

You can use

^(\h*def\h+__init__\([^()]*\)):

Replace with $1 -> None:.

Details

^ - start of a line
(\h*def\h+__init__$.*?$) - Group 1:
- \h* - 0+ horizontal whitespaces
- def - def string
- \h+ - 1+ horizontal whitespaces
- __init__ - an __init__ string
- $ - a ( char
- [^()]* - any 0+ chars other than ( and )
- $ - a ) char.
: - a colon.

edited Nov 21, 2020 at 21:34

answered Nov 21, 2020 at 21:29

Wiktor Stribiżew

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2 Comments

ProGamerGov Over a year ago

I just tested and it works only if everything is on the same line. If I check "matches newline", it seems to select way to much.

Wiktor Stribiżew Over a year ago

@ProGamerGov I updated the answer, now, you do not have to use . matches newline with ^(\h*def\h+__init__$[^()]*$):.

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