Question

I want to create panel with different dataframes, I try to write a function to return this panel. I use some already written function createNewDf(i) which returns dataFrame from existing data, depending on given numeric value.

def panelCreation():
    dp1 = Panel({})
    for i in range(1,3):
        name = 'X' + str(i)
        name = createNewDf(i)
    dp1.update(name)       # This does not work
    return dp1

I can’t find a name of the method to put in place of dp1.update(name)

Answer 1

How about just creating the Panel out of a dict of DataFrame?

In [10]: dd = {}

In [11]: for i in range(1, 3):
   ....:     name = 'X' + str(i)
   ....:     dd[name] = DataFrame(np.random.randn(3,3))
   ....:     

In [12]: Panel(dd)
Out[12]: 
<class 'pandas.core.panel.Panel'>
Dimensions: 2 (items) x 3 (major) x 3 (minor)
Items: X1 to X2
Major axis: 0 to 2
Minor axis: 0 to 2

So something like:

def panelCreation():
    dd = {}
    for i in range(1,3):
        name = 'X' + str(i)
        dd[name] = createNewDf(i)
    return Panel(dd)