class InputList(list):
    """Class to store user input.

    It's basically a list, but slices return a string instead of a list, thus
    allowing things like (assuming 'In' is an instance):

    exec In[4:7]

    or

    exec In[5:9] + In[14] + In[21:25]"""

    def __getslice__(self,i,j):
        return ''.join(list.__getslice__(self,i,j))