python编码规范,二——空行,换行,缩进
1.空行
- 空一行:用于类成员函数之间,或者用于区分不同逻辑块
- 空两行:类与类,类与函数,函数与函数之间
class Test(object): """Test class,提供通用的方法""" def __init__(self): """Test的构造器:""" pass def function1(self): pass def function2(self): pass
def function3(): pass
2.换行
非集合元素
- 反斜杠
with open('test.txt','w') as file_1, \ open("test2.txt", 'w') as file_2: file_2.write(file_1.read())
- 字符串
query_str = ('my name' 'is' ' %s') % "Tom" print query_str
- 二元运算符
income = (gross_wages + taxable_interest + (dividends - qualified_dividends) - ira_deduction - student_loan_interest)
3.缩进
集合元素
- 没有子模块: 一层缩进
my_list = [ 1, 2, 3, 4, 5, 6, ]
result = some_function_that_takes_arguments( 'a', 'b', 'c', 'd', 'e', 'f', )
- 有子模块: 两层缩进
#if and if (this_is_one_thing and that_is_another_thing): do_something() # function def long_function_name( var_one, var_two, var_three,var_four): print(var_one)
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