There's no great batteries-included way to do that (that I'm aware of). You could try to do it with the builtin containers, maybe something like:

data = [(some, headers, go, here),
        (data, from, first, row),
        (data, from, second, row),
        ... ,
        (data, from, last, row)]

and then build a custom key to sort it, like:

import operator

data = data[0] + sorted(data[1:],key=operator.itemgetter(col_num_to_sort_by))

But that's kind of ugly. It may be more maintainable to create a custom class that handles all that itself.

import operator

class Table(list): # inherits from list since it's just a list of lists
    def __init__(self, headers, rows_of_data):
        self.maxcellwidth = 0
        self.headers = headers
        for cell in self.headers:
            self.maxcellwidth = max(len(str(cell)), self.maxcellwidth)
        for row in rows_of_data:
            self.append(row)
            for cell in row:
                self.maxcellwidth = max(len(str(cell)), self.maxcellwidth)
    def sort_by_column(self, sort_by):
        """Sort by column and return a new Table"""
        return Table(self.headers, sorted(self, key=operator.itemgetter(sort_by)))
    def sort_by_columnip(self, sort_by):
        """Sort by column in-place"""
        self.sort(key=operator.itemgetter(sort_by))
    def __str__(self):
        return_value = list()
        header = "|".join(["{0:{1}}".format(header,self.maxcellwidth) for header in self.headers])
        return_value.append(header)
        return_value.append("-" * len(header))
        for row in self:
            return_value.append("|".join(["{0:{1}}".format(cell,self.maxcellwidth) for cell in row]))
        return "\n".join(return_value)

# TEST
>>> headers = ("one","two","three","four")
>>> data = [('1','2','3','5'), ('5','6','7','4')]
>>> table = Table(headers, data)
>>> print(table)
one  |two  |three|four 
-----------------------
1    |2    |3    |5    
5    |6    |7    |4 
>>> table.sort_by_columnip(3)
>>> print(table)
one  |two  |three|four 
-----------------------
5    |6    |7    |4    
1    |2    |3    |5  

provided your data looks like this:

data=[[1, 2, 0.9],
      [2, 2, 0.4],
      [3, 3, 0.3],
      [1, 3, 0.4],
      [1, 1, 0.5],
      [2, 3, 0.9],
      [2, 1, 0.9],
      [3, 1, 0.8],
      [3, 2, 0.9]]

you can just

data.sort()

lists default sort order are by first element, second element, third element, etc. To get your data into that format you can:

with open("./data.dat") as file:
    data = [map(float, ln.split()) for ln in file]

Use sort_values to sort the df by a specific column's values:

In [18]:
df.sort_values('2')

Out[18]:
        0          1     2
4    85.6    January   1.0
3    95.5   February   2.0
7   104.8      March   3.0
0   354.7      April   4.0
8   283.5        May   5.0
6   238.7       June   6.0
5   152.0       July   7.0
1    55.4     August   8.0
11  212.7  September   9.0
10  249.6    October  10.0
9   278.8   November  11.0
2   176.5   December  12.0

If you want to sort by two columns, pass a list of column labels to sort_values with the column labels ordered according to sort priority. If you use df.sort_values(['2', '0']), the result would be sorted by column 2 then column 0. Granted, this does not really make sense for this example because each value in df['2'] is unique.

This should do what you are looking for:

In [1]: df = pd.DataFrame.from_dict([{'Country': 'A', 'Year':2012, 'Value': 20, 'Volume': 1}, {'Country': 'B', 'Year':2012, 'Value': 100, 'Volume': 2}, {'Country': 'C', 'Year':2013, 'Value': 40, 'Volume': 4}])

In [2]: df_pivot = pd.pivot_table(df, index=['Country'], columns = ['Year'],values=['Value'], fill_value=0)

In [3]: df_pivot
Out [4]:
    Value     
Year     2012 2013
Country           
A          20    0
B         100    0
C           0   40

In [5]: df = df_pivot.reindex(df_pivot['Value'].sort_values(by=2012, ascending=False).index)

Out [6]: 
    Value     
Year     2012 2013
Country           
B         100    0
A          20    0
C           0   40

Basically it gets the index of the sorted values and reindex the initial pivot table.