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catalog.py
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64 lines (49 loc) · 1.67 KB
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
A class that uses different static function depending of a parameter passed in
init. Note the use of a single dictionnary instead of multiple conditions
"""
__author__ = "Ibrahim Diop <http://ibrahim.zinaria.com>"
__gist__ = "<https://gist.github.com/diopib/7679559>"
class Catalog():
"""
catalog of multiple static methods that are executed depending on an init
parameter
"""
def __init__(self, param):
# dictionary that will be used to determine which static method is
# to be executed but that will be also used to store possible param
# value
self._static_method_choices = {'param_value_1': self._static_method_1,
'param_value_2': self._static_method_2}
# simple test to validate param value
if param in self._static_method_choices.keys():
self.param = param
else:
raise Exception("Invalid Value for Param: {0}".format(param))
@staticmethod
def _static_method_1():
print("executed method 1!")
@staticmethod
def _static_method_2():
print("executed method 2!")
def main_method(self):
"""
will execute either _static_method_1 or _static_method_2
depending on self.param value
"""
self._static_method_choices[self.param]()
def main():
"""
>>> c = Catalog('param_value_1').main_method()
executed method 1!
>>> Catalog('param_value_2').main_method()
executed method 2!
"""
test = Catalog('param_value_2')
test.main_method()
if __name__ == "__main__":
main()
### OUTPUT ###
# executed method 2!