파이썬 중급 (Inflearn Original) 7편 - namedtuple( tuple과 dict를 합친 자료형이 있다?)

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코드 내용

#Chapter03-04 
# namedTuple의 사용
# 파이썬의 핵심 -> 시퀀스(Sequence), 반복(Iterator), 함수(Function), Class(클래스)
# 클래스 안에 정의할 수 있는 특별한(Built-in) 메서드 

# 객체 -> 파이썬의 데이터를 추상화
# 모든 객체 -> id, type -> value

# 일반적인 튜플

pt1 = (1.0, 5.0)
pt2 = (2.5, 1.5)

from math import sqrt

l_leng1 = sqrt((pt1[0]-pt2[0])**2 + (pt1[1]-pt2[1])**2)

print(l_leng1)

# 네임드 튜플 사용 - 네임드 튜플은 tuple과 dict를 결합해놓은 것 같은 자료형임

from collections import namedtuple

# 네임드 튜플 선언

Point = namedtuple('Point','x y') # x, y가 Key나 마찬가지

pt3 = Point(1.0, 5.0)
pt4 = Point(2.5, 1.5)

# print(pt3)
# print(pt4)

l_leng2 = sqrt((pt3.x - pt4.x)**2 + (pt3.y - pt4.y)**2)
print(l_leng2)

# 네임드 튜플 선언방법

Point1 = namedtuple('Point',['x', 'y'])
Point2 = namedtuple('Point', 'x, y')
Point3 = namedtuple('Point', 'x y')
Point4 = namedtuple('Point', 'x y x class',rename=True) #Default: False

# 출력 
print(Point1, Point2, Point3, Point4)

# 객체 생성
tmp_dict = {'x': 75, 'y':35}

p1 = Point1(10,3)
p2 = Point2(x=20,y=30)
p3 = Point3(y=30,x=310)
p4 = Point4(10,20,30,40)
p5 = Point3(**tmp_dict)

print()

print(p1)
print(p2)
print(p3)

# rename 테스트 
print(p4)
print(p5)

#사용
print(p1[0] + p2[1])
print(p1.x + p2.y)

# Unpacking
x, y = p3
print(x, y)

# 네임드 튜플 메소드

# _make : 다른 객체를 인수로 받아서 mapping한 namedTuple 객체 생성
tmp = [10, 35]          # List와 Tuple로 가능, Dict으로는 안되는데, 이는 **Dict_tmp를 이용하는게 나을듯 Point(**Dict_tmp)
p1 = Point1._make(tmp)
print(p1)

# _fileds : 필드 이름 확인
print(Point1._fields, Point2._fields, Point3._fields, Point4._fields) # rename 된 이후의 필드 이름으로 나옴

# _asDict : namedtuple을 OrderedDict로 변환
b = p1._asdict()
print(b['x'])



# 실사용 실습
# 한 반 20명, 4개의 반(A, B, C, D) A1~A20, B1~B20 ,...

Classes = namedtuple('Classes', 'rank number')
# Classes = namedtuple('Classes', ['rank', 'number'])
# Classes = namedtuple('Classes', 'rank, number')


# List Comprehension
numbers = [str(n) for n in range(1, 21)]
ranks = 'A B C D'.split()
students = [Classes(rank, number) for rank in ranks for number in numbers]

# 추천
students2 = [Classes(rank, number)
            for rank in 'A B C D'.split()
                for number in [str(n)
                    for n in range(1, 21)]]

# 출력 
for s in students2:
    print(s)

 

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출력 결과

Windows PowerShell
Copyright (C) Microsoft Corporation. All rights reserved.

새로운 크로스 플랫폼 PowerShell 사용 https://aka.ms/pscore6

code\extensions\ms-python.python-2020.5.80290\pythonFiles\lib\python\debugpy\wheels\debugpy\launcher' '56692' '--' 'c:\Users\82107\Desktop\파이썬중급강의\p_study\chapter03_03.py'
3.8078865529319543
Point(x=1.0, y=5.0)
Point(x=2.5, y=1.5)
3.8078865529319543
PS C:\Users\82107\Desktop\파이썬중급강의\p_study>  cd 'c:\Users\82107\Desktop\파이썬중급강의\p_study'; & 'C:\Users\82107\AppData\Local\Programs\Python\Python37\python.exe' 'c:\Users\82107\.vscode\extensions\ms-python.python-2020.5.80290\pythonFiles\lib\python\debugpy\wheels\debugpy\launcher' '56712' '--' 'c:\Users\82107\Desktop\파이썬중급강의\p_study\chapter03_04.py' 
3.8078865529319543
3.8078865529319543
<class '__main__.Point'> <class '__main__.Point'> <class '__main__.Point'> <class '__main__.Point'>

Point(x=10, y=3)
Point(x=20, y=30)
Point(x=310, y=30)
Point(x=10, y=20, _2=30, _3=40)
Point(x=75, y=35)
40
40
310 30
Point(x=10, y=35)
('x', 'y') ('x', 'y') ('x', 'y') ('x', 'y', '_2', '_3')
10
Classes(rank='A', number='1')
Classes(rank='A', number='2')
Classes(rank='A', number='3')
Classes(rank='A', number='4')
Classes(rank='A', number='5')
Classes(rank='A', number='6')
Classes(rank='A', number='7')
Classes(rank='A', number='8')
Classes(rank='A', number='9')
Classes(rank='A', number='10')
Classes(rank='A', number='11')
Classes(rank='A', number='12')
Classes(rank='A', number='13')
Classes(rank='A', number='14')
Classes(rank='A', number='15')
Classes(rank='A', number='16')
Classes(rank='A', number='17')
Classes(rank='A', number='18')
Classes(rank='A', number='19')
Classes(rank='A', number='20')
Classes(rank='B', number='1')
Classes(rank='B', number='2')
Classes(rank='B', number='3')
Classes(rank='B', number='4')
Classes(rank='B', number='5')
Classes(rank='B', number='6')
Classes(rank='B', number='7')
Classes(rank='B', number='8')
Classes(rank='B', number='9')
Classes(rank='B', number='10')
Classes(rank='B', number='11')
Classes(rank='B', number='12')
Classes(rank='B', number='13')
Classes(rank='B', number='14')
Classes(rank='B', number='15')
Classes(rank='B', number='16')
Classes(rank='B', number='17')
Classes(rank='B', number='18')
Classes(rank='B', number='19')
Classes(rank='B', number='20')
Classes(rank='C', number='1')
Classes(rank='C', number='2')
Classes(rank='C', number='3')
Classes(rank='C', number='4')
Classes(rank='C', number='5')
Classes(rank='C', number='6')
Classes(rank='C', number='7')
Classes(rank='C', number='8')
Classes(rank='C', number='9')
Classes(rank='C', number='10')
Classes(rank='C', number='11')
Classes(rank='C', number='12')
Classes(rank='C', number='13')
Classes(rank='C', number='14')
Classes(rank='C', number='15')
Classes(rank='C', number='16')
Classes(rank='C', number='17')
Classes(rank='C', number='18')
Classes(rank='C', number='19')
Classes(rank='C', number='20')
Classes(rank='D', number='1')
Classes(rank='D', number='2')
Classes(rank='D', number='3')
Classes(rank='D', number='4')
Classes(rank='D', number='5')
Classes(rank='D', number='6')
Classes(rank='D', number='7')
Classes(rank='D', number='8')
Classes(rank='D', number='9')
Classes(rank='D', number='10')
Classes(rank='D', number='11')
Classes(rank='D', number='12')
Classes(rank='D', number='13')
Classes(rank='D', number='14')
Classes(rank='D', number='15')
Classes(rank='D', number='16')
Classes(rank='D', number='17')
Classes(rank='D', number='18')
Classes(rank='D', number='19')
Classes(rank='D', number='20')
PS C:\Users\82107\Desktop\파이썬중급강의\p_study>

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