Fix bindlines on Python 3.10+ by using collections.abc.Iterable

backtrader/lineiterator.py

@@ -25,6 +25,11 @@
 import operator
 import sys
 
+try:
+    collectionsAbc = collections.abc
+except AttributeError:
+    collectionsAbc = collections
+
 from .utils.py3 import map, range, zip, with_metaclass, string_types
 from .utils import DotDict
 
@@ -226,15 +231,15 @@ def bindlines(self, owner=None, own=None):
 
         if isinstance(owner, string_types):
             owner = [owner]
-        elif not isinstance(owner, collections.Iterable):
+        elif not isinstance(owner, collectionsAbc.Iterable):
             owner = [owner]
 
         if not own:
             own = range(len(owner))
 
         if isinstance(own, string_types):
             own = [own]
-        elif not isinstance(own, collections.Iterable):
+        elif not isinstance(own, collectionsAbc.Iterable):
             own = [own]
 
         for lineowner, lineown in zip(owner, own):

tests/test_lineiterator_bindlines.py

@@ -0,0 +1,52 @@
+#!/usr/bin/env python
+# -*- coding: utf-8; py-indent-offset:4 -*-
+###############################################################################
+#
+# Copyright (C) 2015-2023 Daniel Rodriguez
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+###############################################################################
+from __future__ import (absolute_import, division, print_function,
+                        unicode_literals)
+
+import datetime
+
+import testcommon
+
+import backtrader as bt
+
+
+class BindLinesStrategy(bt.Strategy):
+    params = dict(main=False)
+
+    def __init__(self):
+        self.sma = bt.ind.SMA(self.data, period=5)
+        self.sma.bindlines()
+
+
+def test_bindlines_python_310_collections_abc(main=False):
+    data = testcommon.getdata(0,
+                              fromdate=datetime.datetime(2006, 1, 1),
+                              todate=datetime.datetime(2006, 1, 31))
+
+    testcommon.runtest([data],
+                       BindLinesStrategy,
+                       runonce=False,
+                       preload=False,
+                       exbar=False,
+                       main=main)
+
+
+if __name__ == '__main__':
+    test_bindlines_python_310_collections_abc(main=True)