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@@ -1,3 +1,23 @@
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+# Copyright (c) 2018 luozhouyang
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+#
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+# Permission is hereby granted, free of charge, to any person obtaining a copy
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+# of this software and associated documentation files (the "Software"), to deal
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+# in the Software without restriction, including without limitation the rights
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+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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+# copies of the Software, and to permit persons to whom the Software is
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+# furnished to do so, subject to the following conditions:
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+#
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+# The above copyright notice and this permission notice shall be included in all
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+# copies or substantial portions of the Software.
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+#
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+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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+# SOFTWARE.
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+
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import math
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from .shingle_based import ShingleBased
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@@ -26,11 +46,11 @@ class Cosine(ShingleBased, NormalizedStringDistance,
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profile0 = self.get_profile(s0)
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profile1 = self.get_profile(s1)
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return self._dot_product(profile0, profile1) / (
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- self._norm(profile0) * self._norm(profile1))
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+ self._norm(profile0) * self._norm(profile1))
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def similarity_profiles(self, profile0, profile1):
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return self._dot_product(profile0, profile1) / (
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- self._norm(profile0) * self._norm(profile1))
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+ self._norm(profile0) * self._norm(profile1))
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@staticmethod
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def _dot_product(profile0, profile1):
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