New submission from Naris R <nariscat...@gmail.com>:
Example:
```
from typing import MutableSequence, TypeVar
CliffordGate = TypeVar('CliffordGate')
class QCircuit(MutableSequence[CliffordGate]):
def __init__(self, gates):
self.gates = list(gates)
def __repr__(self):
return f'{self.__class__.__name__}({self.gates})'
def __getitem__(self, key):
return self.gates[key]
def __setitem__(self, key, item):
self.gates[key] = item
def __delitem__(self, key):
del self.gates[key]
def insert(self, key, item):
self.gates.insert(key, item)
a = QCircuit(['H0', 'S2'])
a += a
```
----------
components: Library (Lib)
messages: 323696
nosy: Naris R
priority: normal
severity: normal
status: open
title: calling MutableSequence.extend on self produces infinite loop
type: behavior
versions: Python 3.7
_______________________________________
Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue34427>
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