Melting a pandas dataframe

Question

I have a dataframe like this

    NSW     VIC
0   6718023 5023203
1   6735528 5048207
2   6742690 5061266
3   6766133 5083593
4   6786160 5103965

Answer 1

Using melt

 pd.melt(df)
    Out[318]: 
      variable    value
    0      NSW  6718023
    1      NSW  6735528
    2      NSW  6742690
    3      NSW  6766133
    4      NSW  6786160
    5      VIC  5023203
    6      VIC  5048207
    7      VIC  5061266
    8      VIC  5083593
    9      VIC  5103965