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Update to collections.abc #466

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Update to collections.abc #466

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7 changes: 6 additions & 1 deletion backtrader/writer.py
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,11 @@
import itertools
import sys

try:
collectionsAbc = collections.abc
except AttributeError:
collectionsAbc = collections

import backtrader as bt
from backtrader.utils.py3 import (map, with_metaclass, string_types,
integer_types)
Expand Down Expand Up @@ -205,7 +210,7 @@ def writedict(self, dct, level=0, recurse=False):
self.writelineseparator(level=level)
self.writeline(kline)
self.writedict(val, level=level + 1, recurse=True)
elif isinstance(val, (list, tuple, collections.Iterable)):
elif isinstance(val, (list, tuple, collectionsAbc.Iterable)):
line = ', '.join(map(str, val))
self.writeline(kline + ' ' + line)
else:
Expand Down