컨벤션과 PEP 8

Python으로 배우는 소프트웨어 공학 원칙

Adam Spannbauer

Machine Learning Engineer at Eastman

컨벤션이란?

주먹 인사

인사하는 사람

Python 로고

PEP 8 소개

PEP 8

"코드는 작성되는 것보다 훨씬 더 많이 읽힌다"

PEP 8 위반

#define our data
my_dict ={
    'a'  : 10,
'b': 3,
    'c'  :   4,
             'd': 7}
#import needed package
import numpy as np
#helper function
def DictToArray(d):
    """Convert dictionary values to numpy array"""
    #extract values and convert
              x=np.array(d.values())
              return x
print(DictToArray(my_dict))

array([10,  4,  3,  7])

PEP 8 준수

# Import needed package
import numpy as np

# Define our data
my_dict = {'a': 10, 'b': 3, 'c': 4, 'd': 7}


# Helper function
def dict_to_array(d):
    """Convert dictionary values to numpy array"""
    # Extract values and convert
    x = np.array(d.values())
    return x


print(dict_to_array(my_dict))

array([10,  4,  3,  7])

PEP 8 도구

PyCharm에서의 PEP 8

pycodestyle 패키지

pycodestyle 사용

datacamp@server:~$ pip install pycodestyle
datacamp@server:~$ pycodestyle dict_to_array.py

dict_to_array.py:5:9: E203 whitespace before ':'
dict_to_array.py:6:14: E131 continuation line unaligned for hanging indent
dict_to_array.py:8:1: E265 block comment should start with '# '
dict_to_array.py:9:1: E402 module level import not at top of file
dict_to_array.py:11:1: E302 expected 2 blank lines, found 0
dict_to_array.py:13:15: E111 indentation is not a multiple of four

pycodestyle 출력 결과

pycodestyle 오류 출력

연습해 보겠습니다

Python으로 배우는 소프트웨어 공학 원칙