预计python中有两个空行pep8警告 [英] expected two blank lines pep8 warning in python

问题描述

我使用 vim 编辑器作为 python IDE.下面是一个简单的python程序来计算一个数的平方根:

I'm using vim editor as python IDE. Below is a simple python program to calculate square root of a number:

import cmath
def sqrt():
    try:
        num = int(input("Enter the number : "))
        if num >= 0:
            main(num)
        else:
            complex(num)
    except:
        print("OOPS..!!Something went wrong, try again")
        sqrt()
    return

def main(num):
    squareRoot = num**(1/2)
    print("The square Root of ", num, " is ", squareRoot)
    return

def complex(num):
    ans = cmath.sqrt(num)
    print("The Square root if ", num, " is ", ans)
    return

sqrt()

警告是:

1-square-root.py|2 col 1 C| E302 expected 2 blank lines, found 0 [pep8]
1-square-root.py|15 col 1 C| E302 expected 2 blank lines, found 1 [pep8]
1-square-root.py|21 col 1 C| E302 expected 2 blank lines, found 0 [pep8]

你能说出为什么会出现这些警告吗?

Can you please tell why these warnings are coming?

推荐答案

import cmath


def sqrt():
    try:
        num = int(input("Enter the number : "))
        if num >= 0:
            main(num)
        else:
            complex_num(num)
    except:
        print("OOPS..!!Something went wrong, try again")
        sqrt()
    return


def main(num):
    square_root = num**(1/2)
    print("The square Root of ", num, " is ", square_root)
    return


def complex_num(num):
    ans = cmath.sqrt(num)
    print("The Square root if ", num, " is ", ans)
    return

sqrt()

上一个将解决您的 PEP8 问题.导入后，您需要在开始代码之前添加 2 行新行.此外，在每个 def foo() 之间，您还需要有 2 个.

The previous will fix your PEP8 problems. After your import you need to have 2 new lines before starting your code. Also, between each def foo() you need to have 2 as well.

在您的情况下，导入后有 0，并且每个函数之间有 1 个换行符.PEP8 的一部分，您需要在代码结束后换行.不幸的是，当我在这里粘贴您的代码时，我不知道如何显示它.

In your case you had 0 after import, and you had 1 newline between each function. Part of PEP8 you need to have a newline after the end of your code. Unfortunately I don't know how to show it when I paste your code in here.

注意命名，它也是 PEP8 的一部分.我将 complex 更改为 complex_num 以防止与内置 混淆复杂.

Pay attention to the naming, it's part of PEP8 as well. I changed complex to complex_num to prevent confusion with builtin complex.

最后，它们只是警告，如果需要，它们可以被忽略.

In the end, they're only warning, they can be ignored if needed.

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