Python boolean methods naming convention
I'm a Rubyist learning Python and I'm wondering if there is a convention in Python along the lines of the following.
In Ruby, methods that return booleans are supposed to always end in a
?. For example,
def palindrome?(string) # some code that tests whether string is a palindrome end
The only existing SO question I can find speaking to this does not provide a definitive answer.作者: jayqui 的来源 发布者： 2017 年 12 月 27 日
You can define it like
作者: Umar Asghar 发布者: 2017 年 12 月 27 日
def is_palindrome(variable): # your logic\ # return True / False
There is no standard naming convention specific to boolean-returning methods. However, PEP8 does have a guide for naming functions.
Function names should be lowercase, with words separated by underscores as necessary to improve readability.
Typically, people start a function with
is_palindrome) to describe that a boolean value is returned.
I concur with @CarolChen on the principle of turning to PEP8, the Python Style Guide, for guidance. I will suggest however that "as necessary to improve readability" is in the eye of the beholder. For example, each of these functions are used in Python either as functions of the
str object or as builtin functions. These are as fundamental as it gets in the Python ecosystem and are good examples of a usage style focused on returning a boolean state AND having easily readable function names.
isalnum() isalpha() isdecimal() isdigit() isidentifier() islower() isnumeric() isprintable() isspace() istitle() isupper()
作者: E. Ducateme 发布者: 2017 年 12 月 27 日