评论续行

Question

我有这个代码块我想评论,但内联注释不起作用.我不确定PEP8指南适用于何处.建议吗？

        if next_qi < qi + lcs_len \ # If the next qLCS overlaps 
        and next_ri < ri + lcs_len \ # If the next rLCS start overlaps 
        and next_ri + lcs_len > ri: # If the next rLCS end overlaps
            del candidate_lcs[qi] # Delete dupilicate LCS.

Answer 1

在Python中,\在行继续符之后没有任何东西可以出现.

但是,如果将条件置于括号中,则可以执行所需操作:

if (next_qi < qi + lcs_len   # If the next qLCS overlaps 
and next_ri < ri + lcs_len   # If the next rLCS start overlaps 
and next_ri + lcs_len > ri): # If the next rLCS end overlaps
    del candidate_lcs[qi] # Delete dupilicate LCS.

以下是演示:

>>> if (1 == 1   # cond 1
... and 2 == 2   # cond 2
... and 3 == 3): # cond 3
...     print True
...
True
>>>

该相关PEP 8方针是:

包装长行的首选方法是在括号,括号和括号内使用Python隐含的行继续.通过将表达式包装在括号中,可以在多行中分割长行.这些应该优先使用反斜杠来继续行.