Steven D'Aprano added the comment:
Hi Rose, this is a FAQ:
https://docs.python.org/3/faq/programming.html#why-are-default-values-shared-between-objects
although it's also a feature that does cause beginners some trouble, see for
example my comment here for more information:
https://bugs.pyt
Eric V. Smith added the comment:
This is defined behavior in the language, so it's not a bug. The "pythonic" way
to deal with this is usually:
def funct(self, array = None):
if array is None:
array = []
--
components: +Interpreter Core -ctypes
nosy: +eric.smith
resolutio
Rose Ridder added the comment:
Sorry, incorrect code pasted in. The full comment and code is below:
When creating several objects in one program, if there are lists passed into
functions as optional arguments, those lists are persistent across all objects.
# -*- coding: utf-8 -*-
class Obj:
Rose Ridder added the comment:
Including script explicitly:
# -*- coding: utf-8 -*-
class Obj:
def __init__(self, num):
self.num = num
self.var = self.funct()
def funct(self, array = []):
print (array)
array = [1,2,3]
return array
New submission from Rose Ridder :
When creating several objects in one program, if there are lists passed into
functions as optional arguments, those lists are persistent across all objects.
--
components: ctypes
files: PythonObjectListIssue.py
messages: 381153
nosy: rosadenderon
prior
