pd.DataFrame.melt

pandas.DataFrame.melt(id_vars=None, value_vars=None, var_name=None, value_name='value', col_level=None)

Supported Arguments

• id_vars: Constant Column label or list of labels
• value_vars: Constant Column label or list of labels

Example Usage

>>> @bodo.jit
... def f(df, id_vars, value_vars):
...   return df.melt(id_vars, value_vars)
>>> df = pd.DataFrame({"A": ["a", "b", "c"], 'B': [1, 3, 5], 'C': [2, 4, 6])
>>> f(df, ["A"], ["B", "C"])
    A variable  value
0  a        B      1
1  b        B      3
2  c        B      5
3  a        C      2
4  b        C      4
5  c        C      6

Note

To offer increased performance, row ordering and corresponding Index value may not match Pandas when run on multiple cores.