1

我写了一个很长、很整洁的 Python 类：

class Foo(object):                     |    |
      """It is long and it has to deal |    |
      with PEP8 code width requirements|    |
      which are 72 characters for      |    |
      comments and docstrings and 79   |    |
      for actual code.                 |    |
      """                              |    |
      class_parm = 12                  |    |
      pass # after several long, broken down|
           # into several pieces, but in the|
           # end *fit* lines of script, phew|
                                            ^
                                           79 characters (say)
                                       ^    
                                      72 characters (say)

现在，事实证明我需要动态创建这个大类，以便它的一些静态成员在它的一个实例和另一个实例之间是不同的。简而言之，我需要把它变成这样的东西：

def make_foo(parm):                   
    class Foo(object):                 |    |
          """It is long and it has to d|al  |    
          with PEP8 code width requirem|nts |    
          which are 72 characters for  |    |    
          comments and docstrings and 7|    |    
          for actual code.             |    |    
          """                          |    |    
          class_parm = parm            |    |    
          pass # after several long, broken |own
               # into several pieces, but in|the
               # end *fit* lines of script, |hew
    return Foo                              |
                                            ^
                                           79 characters (say)
                                       ^    
                                      72 characters (say)

所以它会打破 PEP-8 的安排。我仍然可以通过审核所有内容并将线条分解成更多部分，以便它仍然适合。但这很乏味，我觉得这是我不应该担心的事情，因为它与我的实际编码活动没什么可看的。

我应该怎么办？有没有办法在不需要添加另一个缩进级别的情况下实现这一点？喜欢使用装饰器？或者有没有神奇的替代方法来分隔 python 块？可能是特殊字符？

我愿意编写符合标准且易于编辑的*.py文件，但有时这是一个令人费解的目标：\

4

2 回答 2

3

您可以使用继承：

class Foo(object): 
    """It is long and it has to deal
    with PEP8 code width requirements
    which are 72 characters for
    comments and docstrings and 79
    for actual code. 
    """                         
    class_parm = 12
    pass # after several long, broken down|
       # into several pieces, but in the|
       # end *fit* lines of script, phew|


def make_foo(parm):                   
    class Foo2(Foo):
        """Foo without indentation problems."""
        class_parm = parm
    return Foo2

子类不应该有缩进问题，因为它非常小。

于 2015-12-17T23:29:18.890 回答
2

您也可以通过直接分配来指定类的文档字符串__doc__。

doc_of_foo = '''
Very long text, very long text, very long text
'''

def make_foo():
    def one_more_level_for_good_measure():
        class Foo(object):
            __doc__ = doc_of_foo

        return Foo
    return one_more_level_for_good_measure()

Foo = make_foo()

# help(Foo) → Very long text ...
于 2015-12-16T15:52:54.067 回答