[wxPython-users] Many Similar Dialogs For Date Entry

[Chris Mellon]

On 2/2/07, Rich Shepard <rshepard at appl-ecosys.com> wrote:
> On Fri, 2 Feb 2007, Don Dwiggins wrote:
>
> >>  Perhaps the one dialog class called with named arguments that are used to
> >> present and return only the relevant fields. The dialog class then has a
> >> series of if ... elif control statements.
>
> > Or use a dictionary, keyed on the argument names.
>
> Don,
>
>    Please show me an example of how the dictionary would be implemented. It
> looks like something I ought to learn for future reference.
>
> Thanks,
>

Python lacks a case statement, and nestings if/elif can get
cumbersome. The common idiom is to use a dictionary to map values to
callables.

Pseudo C/C+ code:

void processID(int id) {
 switch id {
  case SWITCH_ONE:
   process_one();break;
  case SWITCH_TWO:
   process_two();break
}
}

Python with nested if:

def processID(id):
  if id == SWITCH_ONE:
    process_one()
  elif id == SWITCH_TWO:
    process_two()

Python with dictionary:

def processID(id):
  mapper = {
    SWITCH_ONE:process_one,
    SWITCH_TWO:process_two
  }
  mapper[id]()