do not copy DF if copy is false
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@ -160,7 +160,7 @@ class Exchange(object):
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def klines(self, pair: str, copy=True) -> DataFrame:
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def klines(self, pair: str, copy=True) -> DataFrame:
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if pair in self._klines:
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if pair in self._klines:
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return self._klines[pair].copy()
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return self._klines[pair].copy() if copy else self._klines[pair]
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else:
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else:
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return None
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return None
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