def test_append_csv(tmpdir):
path = str(tmpdir) + 'log.csv'
data = DDF({'a': 1, 'b': 10})
append_csv(data, path)
loaded = DDF.from_csv(path)
assert loaded.equals(data)
new_data = DDF({'a': 100, 'b': 101})
append_csv(new_data, path)
loaded_appended = DDF.from_csv(path)
appended = data.append(new_data)
assert appended.equals(loaded_appended)
def append_csv(data, path):
assert path.endswith('.csv')
to_log = data if isinstance(data, DDF) else DDF(data)
if os.path.isfile(path):
current_log = DDF.from_csv(path)
current_log = current_log.append(to_log, axis=0)
else:
current_log = to_log
current_log.to_csv(path)
def test_saving_to_csv_by_default_does_not_save_index(tmpdir):
save_path = str(tmpdir) + '/saved_df.csv'
df = DDF({'col': np.arange(5)})
df.to_csv(save_path)
loaded_df = DDF.from_csv(save_path)
assert 'Unnamed: 0' not in loaded_df
