https://www.python.org/dev/peps/pep-0008/
(1) Use 4 spaces per indentation level
foo = long_function_name(var_one, var_two, var_three, var_four)
(2) Limit all lines to a maximum of 79 characters.
(3) 연산자 위치
# easy to match operators with operands income = (gross_wages + taxable_interest + (dividends - qualified_dividends) - ira_deduction - student_loan_interest) # 연산자가 함께 내려간다.
(4) Avoid extraneous whitespace in the following situations:
불필요한 공백은 지양한다.
# Correct: spam(ham[1], {eggs: 2}) # Wrong: spam( ham[ 1 ], { eggs: 2 } ) # Correct: foo = (0,) # Wrong: bar = (0, ) # Correct: if x == 4: print x, y; x, y = y, x # Wrong: if x == 4 : print x , y ; x , y = y , x # Correct: ham[1:9], ham[1:9:3], ham[:9:3], ham[1::3], ham[1:9:] ham[lower:upper], ham[lower:upper:], ham[lower::step] ham[lower+offset : upper+offset] ham[: upper_fn(x) : step_fn(x)], ham[:: step_fn(x)] ham[lower + offset : upper + offset] # Wrong: ham[lower + offset:upper + offset] ham[1: 9], ham[1 :9], ham[1:9 :3] ham[lower : : upper] ham[ : upper] # Correct: spam(1) # Wrong: spam (1) # Correct: dct['key'] = lst[index] # Wrong: dct ['key'] = lst [index] # Correct: x = 1 y = 2 long_variable = 3 # Wrong: x = 1 y = 2 long_variable = 3 # = 의 양옆에 공백을 지양한다. # Correct: def complex(real, imag=0.0): return magic(r=real, i=imag) # Wrong: def complex(real, imag = 0.0): return magic(r = real, i = imag)
(5) 연산자의 경우 우선순위에 따라 공백이 이뤄진다.
# Correct: i = i + 1 submitted += 1 x = x*2 - 1 hypot2 = x*x + y*y c = (a+b) * (a-b) # Wrong: i=i+1 submitted +=1 x = x * 2 - 1 hypot2 = x * x + y * y c = (a + b) * (a - b)
(6) 되도록이면 같은 라인에 작성하지 않는다.
# Correct: if foo == 'blah': do_blah_thing() do_one() do_two() do_three()
Rather not:
# Wrong: if foo == 'blah': do_blah_thing() do_one(); do_two(); do_three()
(7) 함수/변수의 이름은 snake_case
(good) def python_function_name(arg1, arg2): (bad) def PythonFunctionName(arg1, arg2): (bad) def pythonFunctionName(arg1, arg2):