[코딩도장]45.모듈과 패키지 만들기

45. 모듈과 패키지 만들기

 

45.1 모듈

# square.py

base = 2


def square(n):
    return base ** n

# import square
print(square.base)
print(square.square(10))

==========================

2
1024



# from square import base, square
print(base)
print(square(10))

==========================

2
1024

 

# person.py

class Person:
    def __init__(self, name, age, address):
        self.name = name
        self.age = age
        self.address = address

    def greeting(self):
        print('hello, it\'s', self.name)

# import person
maria = person.Person('maria', 20, 'seoul songpa')
maria.greeting()

==========================

hello, it's maria

 

45.2 모듈의 시작점 

# hello.py

print('module start')
print('module.py __name__', __name__)
print('module end')

# main.py

import hello

print('main.py __name__', __name__)

module start
module.py __name__ hello
module end
main.py __name__ __main__

==========================

module start
module.py __name__ hello
module end
main.py __name__ __main__

 

# calc.py

def add(a, b):
    return a + b


def mul(a, b):
    return a * b


if __name__ == '__main__':
    print(add(10, 20))
    print(mul(10, 20))
    
=================================

30
200


❯ python3 calc.py
30
200

# main2.py

import calc

lineBoard = '\n==========================\n'
print(lineBoard)

print(calc.add(50, 60))
print(calc.mul(50, 60))

==========================

110
3000

 

45.3 패키지 

from calcpkg.operation import add
import calcpkg.geometry
import underline

underline

print(calcpkg.operation.add(10, 20))
print(calcpkg.operation.mul(10, 20))

print(calcpkg.geometry.triangle_area(30, 40))
print(calcpkg.geometry.rectangle_area(30, 40))

==========================

30
200
600.0
1200

from calcpkg.operation import add, mul
from calcpkg.geometry import triangle_area, rectangle_area
import underline

underline

print(add(10, 20))
print(mul(10, 20))

print(triangle_area(30, 40))
print(rectangle_area(30, 40))

==========================

30
200
600.0
1200

import sys

print(sys.path)

==========================

['/Users/cheryl/Documents/workspace/practice2022/python-coding', 
'/Users/cheryl/Documents/workspace/practice2022/python-coding', 
'/Applications/PyCharm.app/Contents/plugins/python/helpers/pycharm_display', 
'/Users/cheryl/.pyenv/versions/3.10.0a5/lib/python310.zip', 
'/Users/cheryl/.pyenv/versions/3.10.0a5/lib/python3.10', 
'/Users/cheryl/.pyenv/versions/3.10.0a5/lib/python3.10/lib-dynload', 
'/Users/cheryl/.pyenv/versions/3.10.0a5/lib/python3.10/site-packages', 
'/Applications/PyCharm.app/Contents/plugins/python/helpers/pycharm_matplotlib_backend']

 

45.4 패키지에서 from import 응용 

from calcpkg import *

print(add(10, 20))
print(mul(10, 20))

print(triangle_area(30, 40))
print(rectangle_area(30, 40))

==========================

30
200
600.0
1200