The life of TB

"""from stackoverflowhttp://stackoverflow.com/questions/136097/what-is-the-difference-between-staticmethod-and-classmethod-in-python To decide whether to use @staticmethod or @classmethod you have to look inside your method. If your method access other var/method in your class then Use @classmethod. On the other hand if your method does not touched any other parts of the class then use @staticme..

Python 2016. 5. 7. 10:45

# 두 개 리스트를 가진 인스턴스를 생성해서 BO, Data, UI 구조의 객체지향 프로그래밍 class Data():def __init__(self, this_list):self.my_list = this_list def get_data(self):return self.my_list class Calc():def __init__(self, one, two):self.one = oneself.two = two def get_calc_list(self):new_list = [x + y for x, y in zip(self.one.get_data(), self.two.get_data())]return Data(new_list).get_data() class UI():def __init__(self):self..

Python 2016. 5. 6. 09:46

# Class Methods class InsCounter():count = 0 def __init__(self, val):self.val = valInsCounter.count += 1 def getValue(self):return self.val @classmethoddef getCount(cls):return cls.count a = InsCounter(1)b = InsCounter(2)c = InsCounter(3) for o in [a, b, c]:print("val of obj: {}".format(o.getValue()))print("count: {}".format(o.getCount())) # 결과val of obj: 1count: 3val of obj: 2count: 3val of obj..

Python 2016. 5. 4. 18:30

# Big-O Examples # O(1) Constant """ 입력이 무한히 많아도 1회 실행한다. """def func_constant(values):print(values[0]) lst = [1, 2, 3, 4, 5, 6] func_constant(lst) # O(n) Linear """ 입력 전체를 직선적으로 순회하면서 실행한다. """def func_lin(lst):for val in lst:print(val) func_lin(lst) # O(n^2) Quadratic """ 입력이 제곱수로 늘어나면서 실행한다. """def func_quad(lst):for item_1 in lst:for item_2 in lst:print(item_1, item_2) func_quad(lst) # compl..

Python 2016. 5. 4. 11:14

# Binary Array Searching from time import time def contains(collection, target):return target in collection def bs_contains(ordered, target):low = 0high = len(ordered) - 1while low

Python 2016. 5. 3. 14:51

# 같은 형태의 클래스를 여러개 사용할때 효과적으로 생성 class AttributeInitType(type):def __call__(self, *args, **kwargs):obj = type.__call__(self, *args)for name, value in kwargs.items():setattr(obj, name, value)return obj class Submarine(object, metaclass = AttributeInitType):#attrs = ['color', 'year', 'name'] pass sub = Submarine(name = 'Narwal', year = 2000, color = 'Black') print(sub.year) # 결과2000 # 상속으로는 부모 클래스의..

Python 2016. 5. 3. 12:58

### 함수 객체 핸들 def play(): print('play') def stop(): print('stop') def main(): fs = [play, stop] for f in fs: f() if __name__ == '__main__': main() #결과 play stop ### pass by reference def add_ls(ls): ls.append(2) return def main(): ls = [1] print("before:", ls) add_ls(ls) print("after:", ls) if __name__ == '__main__': main() #결과 before: [1] after: [1, 2] ### list/tuple as function argument def ls_..

Python 2016. 4. 28. 20:16

# Multiple Argument def main():myFunc(1, 2, 3, 4, 5) # multiple argumentdef myFunc(one, two, *args):print("the values are {} {} {}".format(one, two, args)) ourFunc(1, 2, 3, 4, 5, 6, onee = "Monday", twoo = "Tuesday") #Key Word Argumentsdef ourFunc(a, b, c, *args, **kwargs):print("hello", kwargs['onee'], kwargs['twoo']) if __name__ == "__main__": main() # 결과the values are 1 2 (3, 4, 5)hello Monda..

Python 2016. 4. 28. 18:08