大多数使用python的人更喜欢下划线，但即使我已经使用python 5年多了，我仍然不喜欢它们。我只是觉得它们很丑，但也许这就是我脑子里的爪哇。

I simply like CamelCase better since it fits better with the way classes are named, It feels more logical to have SomeClass.doSomething() than SomeClass.do_something(). If you look around in the global module index in python, you will find both, which is due to the fact that it's a collection of libraries from various sources that grew overtime and not something that was developed by one company like Sun with strict coding rules. I would say the bottom line is: Use whatever you like better, it's just a question of personal taste.

我个人在用其他编程语言开发时使用Java的命名约定，因为它是一致的，易于遵循。这样我就不会一直纠结于使用什么约定，而这本来不应该是我项目中最难的部分!

There is PEP 8, as other answers show, but PEP 8 is only the styleguide for the standard library, and it's only taken as gospel therein. One of the most frequent deviations of PEP 8 for other pieces of code is the variable naming, specifically for methods. There is no single predominate style, although considering the volume of code that uses mixedCase, if one were to make a strict census one would probably end up with a version of PEP 8 with mixedCase. There is little other deviation from PEP 8 that is quite as common.

列宁告诉过……我也是来自Java/ c#世界的。还有SQL。 仔细审视我自己，试图找到第一眼就能理解的复杂结构的例子，比如列表字典中的列表，其中所有东西都是对象。 对我来说，骆驼语或它们的变体应该成为任何语言的标准。在复杂句中应保留下划线。

无论是否在课堂上或在课堂外:

变量和函数小写，如下所示:

name = "John"

def display(name):
    print("John")

如果它们多于一个单词，则用下划线“_”分隔，如下所示:

first_name = "John"

def display_first_name(first_name):
    print(first_name)

并且，如果一个变量是一个常量，它是大写的，如下所示:

FIRST_NAME = "John"

正如Python代码风格指南所承认的那样，

Python的命名约定 图书馆有点乱，所以我们 永远不能完全一致

注意，这只是指Python的标准库。如果他们不能保持一致，那么几乎没有希望为所有Python代码拥有一个普遍遵守的约定，不是吗?

从这一点，以及这里的讨论，我可以推断，如果一个人在过渡到Python时继续使用例如Java或c#的(清晰而完善的)变量和函数命名约定，这并不是一个可怕的罪恶。当然，要记住，最好是遵循代码库/项目/团队的流行风格。正如Python风格指南所指出的，内部一致性是最重要的。

尽管把我当异教徒看待吧。:-)和OP一样，我不是一个“Pythonista”，至少现在还不是。