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large_file_test.py
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48 lines (37 loc) · 1.11 KB
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# Copyright 2016 Feather Developers
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import os
import sys
import numpy as np
from pandas.util.testing import assert_frame_equal
import pandas as pd
import feather
import uuid
nrows = 4000000
ncols = 100
data = np.random.randn(nrows)
df = pd.DataFrame({'c{0}'.format(i): data
for i in range(ncols)})
def guid():
return uuid.uuid4().hex
path = 'test_{0}.feather'.format(guid())
try:
feather.write_dataframe(df, path)
df2 = feather.read_dataframe(path)
assert_frame_equal(df, df2)
finally:
try:
os.remove(path)
except os.error:
pass