如何编写符合PEP8的非常长的string，防止E501

由于PEP8build议保持低于你的Python程序的80列规则，我怎么能遵守与长string，即

s = "this is my really, really, really, really, really, really, really long string that I'd like to shorten."

我将如何去扩大这个以下的行，即

 s = "this is my really, really, really, really, really, really" + "really long string that I'd like to shorten."

隐式连接可能是最干净的解决scheme：

 s = "this is my really, really, really, really, really, really," \ " really long string that I'd like to shorten."

编辑在反思我同意，托德的build议，使用括号，而不是连续续行更好的所有原因，他给。我唯一的犹豫是，把元组与括号内的string混淆是相对容易的。

另外，因为相邻的string常量是自动连接的，所以你可以这样编码：

 s = ("this is my really, really, really, really, really, really, " "really long string that I'd like to shorten.")

请注意没有加号，并且在示例的格式之后添加了额外的逗号和空格。

就我个人而言，我不喜欢反斜杠，我记得在某个地方读到它的使用实际上已经被弃用，而更倾向于这种更明确的forms。记住“显式比隐式更好”。

我认为反斜杠不那么清楚，不太有用，因为这实际上是逃避了换行符。如果有必要的话，就不可能在行结束后加上注释。可以用串联的string常量来做到这一点：

 s = ("this is my really, really, really, really, really, really, " # comments ok "really long string that I'd like to shorten.")

我使用了一个“python line length”的Googlesearch作为第一个结果返回PEP8链接，但是也链接到了另一个关于这个主题的好的StackOverflow文章：“ 为什么Python PEP-8指定最大行长度为79个字符？

另一个好的search短语是“python line continuation”。

我认为你的问题中最重要的词是“build议”。

编码标准是有趣的事情。通常他们提供的指导在撰写时（例如，大多数terminal不能显示大于80个字符的行）具有非常好的基础，但是随着时间的推移，它们在function上已经过时，但仍然严格遵守。我想你在这里需要做的是衡量“打破”你的代码的可读性和可抑制性的特定build议的相对优点。

对不起，这不直接回答你的问题。

你失去了一个空间，你可能需要一个续行字符，即。一个\ 。

 s = "this is my really, really, really, really, really, really" + \ " really long string that I'd like to shorten."

甚至：

 s = "this is my really, really, really, really, really, really" \ " really long string that I'd like to shorten."

Parens也会工作，而不是延续线路，但是你冒着有人认为你打算拥有一个元组而忘记了一个逗号。举个例子：

 s = ("this is my really, really, really, really, really, really" " really long string that I'd like to shorten.")

与：

 s = ("this is my really, really, really, really, really, really", " really long string that I'd like to shorten.")

使用Python的dynamictypes，代码可能会以任何方式运行，但会产生不正确的结果。

反斜杠：

 s = "this is my really, really, really, really, really, really" + \ "really long string that I'd like to shorten."

或包裹在parens：

 s = ("this is my really, really, really, really, really, really" + "really long string that I'd like to shorten.")

用\可以将语句扩展为多行：

 s = "this is my really, really, really, really, really, really" + \ "really long string that I'd like to shorten."

应该pipe用。