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# Copyright 2016 Feather Developers
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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# http://www.apache.org/licenses/LICENSE-2.0
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import feather.ext as ext
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def write_dataframe(df, path):
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Write a pandas.DataFrame to Feather format
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writer = ext.FeatherWriter(path)
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# TODO(wesm): pipeline conversion to Arrow memory layout
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for i, name in enumerate(df.columns):
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if not isinstance(name, six.string_types):
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writer.write_array(name, col)
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def read_dataframe(path, columns=None):
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Read a pandas.DataFrame from Feather format
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reader = ext.FeatherReader(path)
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# TODO(wesm): pipeline conversion to Arrow memory layout
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for i in range(reader.num_columns):
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name, arr = reader.read_array(i)
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return pd.DataFrame(data)
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feather/api.py
