CODEWITHSUNDEEP
pythonpython-3.xdjangodjango-3.1
Oto Shavadze
Oto Shavadze

Reputation: 42793

Unexpected error: replace() takes 2 positional arguments but 3 were given

In settings.py I have:

BASE_DIR = Path(__file__).resolve().parent.parent

Then In some view:

from django.http import HttpResponse
from django.conf import settings


def test_view(request):
    return HttpResponse( settings.BASE_DIR.replace("src", "") )

This gives error: replace() takes 2 positional arguments but 3 were given

It confuses me, how that error appears? also if do:

return HttpResponse( settings.BASE_DIR )

this returns full path, something like: /home/full/path/to/project/src

also this works

 return HttpResponse( "/home/full/path/to/project/src".replace("src", "") )

Can you help me and tell what is wrong with this line:

return HttpResponse( settings.BASE_DIR.replace("src", "") )

?

Upvotes: 14

Views: 22015

Answers (3)

iklinac
iklinac

Reputation: 15738

From Django 3.1 BASE_DIR is by default set to new pathlib module Path object as documented

from source

BASE_DIR = Path(__file__).resolve().parent.parent

Coincidentally Path has also .replace() method but it does not have same use case as string replace

You might want to use instead parent accessor:

settings.BASE_DIR.parent

Upvotes: 2

Le Minaw
Le Minaw

Reputation: 885

You're not calling the replace method of the str stype, but the one of the Path class from pathlib (because BASE_DIR is a Path instance).

It only takes two args (eg. my_path.replace(target)), therefore the exception.

Docs here about what is does (basically renaming a file or directory).

Cast your Path instance to a string.

Upvotes: 6

NKSM
NKSM

Reputation: 5874

Convert it to string:

str(settings.BASE_DIR).replace("src", "")

Upvotes: 24

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