5 examples of 'python pandas concatenate multiple columns' in Python

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29def _concat(df, type):
30 if df is None:
31 df = pd.DataFrame(_object_blocks[type])
32 else:
33 _df = pd.DataFrame(_object_blocks[type])
34 df = pd.concat([df, _df], sort=True)
35 return df

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40def test_deconcatenate_column_string_no_sep(dataframe):
41 with pytest.raises(ValueError):
42 df_orig = dataframe.concatenate_columns(
43 column_names=["a", "decorated-elephant"],
44 sep="-",
45 new_column_name="index",
46 )
47 df = df_orig.deconcatenate_column(
48 column_name="index", new_column_names=["A", "B"]
49 )
33def concat(self, l):
34 if not len(l):
35 return "NA"
36 return ";".join([str(i) for i in l])
813def merge(old_cols, new_cols):
814 return old_cols + new_cols
468def _concat(self, *args, **kwargs):
469 if self._dask:
470 return da.concatenate(*args, **kwargs)
471 else:
472 return np.concatenate(*args, **kwargs)

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