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18 changes: 9 additions & 9 deletions pandas/core/reshape/melt.py
Original file line number Diff line number Diff line change
Expand Up @@ -109,19 +109,19 @@ def melt(
... }
... )
>>> df
A B C
A B C
0 a 1 2
1 b 3 4
2 c 5 6

>>> pd.melt(df, id_vars=["A"], value_vars=["B"])
A variable value
A variable value
0 a B 1
1 b B 3
2 c B 5

>>> pd.melt(df, id_vars=["A"], value_vars=["B", "C"])
A variable value
A variable value
0 a B 1
1 b B 3
2 c B 5
Expand All @@ -138,15 +138,15 @@ def melt(
... var_name="myVarname",
... value_name="myValname",
... )
A myVarname myValname
A myVarname myValname
0 a B 1
1 b B 3
2 c B 5

Original index values can be kept around:

>>> pd.melt(df, id_vars=["A"], value_vars=["B", "C"], ignore_index=False)
A variable value
A variable value
0 a B 1
1 b B 3
2 c B 5
Expand All @@ -158,20 +158,20 @@ def melt(

>>> df.columns = [list("ABC"), list("DEF")]
>>> df
A B C
D E F
A B C
D E F
0 a 1 2
1 b 3 4
2 c 5 6

>>> pd.melt(df, col_level=0, id_vars=["A"], value_vars=["B"])
A variable value
A variable value
0 a B 1
1 b B 3
2 c B 5

>>> pd.melt(df, id_vars=[("A", "D")], value_vars=[("B", "E")])
(A, D) variable_0 variable_1 value
(A, D) variable_0 variable_1 value
0 a B E 1
1 b B E 3
2 c B E 5
Expand Down
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