코드로 우주평화

Given a mixed array of number and string representations of integers, add up the non-string integers and subtract this from the total of the string integers. Return as a number. Solution: def div_con(arr): x = sum(i for i in arr if isinstance(i, int)) y = sum(int(i) for i in arr if isinstance(i, str)) return x - y

Make a function that returns the value multiplied by 50 and increased by 6. If the value entered is a string it should return "Error". Solution: problem = lambda x: "Error" if isinstance(x, str) else x * 50 + 6

Due to another of his misbehaved, the primary school's teacher of the young Gauß, Herr J.G. Büttner, to keep the bored and unruly young schoolboy Karl Friedrich Gauss busy for a good long time, while he teaching arithmetic to his mates, assigned him the problem of adding up all the whole numbers from 1 through a given number n. Your task is to help the young Carl Friedrich to solve this problem ..

In this kata you will create a function that takes a list of non-negative integers and strings and returns a new list with the strings filtered out. Example filter_list([1,2,'a','b']) == [1,2] filter_list([1,'a','b',0,15]) == [1,0,15] filter_list([1,2,'aasf','1','123',123]) == [1,2,123] Solution: def filter_list(l): return [i for i in l if isinstance(i, int)]

어떤 객체가 무슨 타입인지를 알려면 type() 메서드를 활용하면 됩니다. 하지만 어떤 타입이 맞는지 참/거짓으로 체크만 하고 싶다면 isinstance()를 활용할 수 있습니다. 사용법은 간단합니다. isinstance 메서드에 첫 번째 인자로 해당 객체를, 두번째 인자로 체크하고 싶은 타입을 넣어주면 됩니다. def 체크_문자열(객체): return isinstance(객체, str) print(체크_문자열('문자')) # >>> True print(체크_문자열(123)) # >>> False 문자열을 넣었을 때는 True, 숫자를 넣었을 때는 False를 반환합니다. def 체크_리스트(객체): return isinstance(객체, list) print(체크_리스트('문자')) # >>> Fals..