将零点移动到底:CodeWars中的测试失败了吗? [英] Moving Zeros To The End: Failing the test in CodeWars?
问题描述
问题
问题链接: https://www.codewars.com/kata/52597aa56021e91c93000cb0/train/python
编写一个算法，该算法采用一个数组并将所有零移动到末尾，并保留其他元素的顺序.
Write an algorithm that takes an array and moves all of the zeros to the end, preserving the order of the other elements.
move_zeros([false,1,0,1,2,0,1,3,"a"]) # returns[false,1,1,2,1,3,"a",0,0]
我的代码:
def move_zeros(array):
list = []
list2 = []
for n in array:
if n is 0:
list2.append(n)
else:
list.append(n)
return list + list2
样本测试:
Test.describe("Basic tests")
Test.assert_equals(move_zeros([1,2,0,1,0,1,0,3,0,1]),[ 1, 2, 1, 1, 3, 1, 0, 0, 0, 0 ])
Test.assert_equals(move_zeros([9,0.0,0,9,1,2,0,1,0,1,0.0,3,0,1,9,0,0,0,0,9]),[9,9,1,2,1,1,3,1,9,9,0,0,0,0,0,0,0,0,0,0])
Test.assert_equals(move_zeros(["a",0,0,"b","c","d",0,1,0,1,0,3,0,1,9,0,0,0,0,9]),["a","b","c","d",1,1,3,1,9,9,0,0,0,0,0,0,0,0,0,0])
Test.assert_equals(move_zeros(["a",0,0,"b",None,"c","d",0,1,False,0,1,0,3,[],0,1,9,0,0,{},0,0,9]),["a","b",None,"c","d",1,False,1,3,[],1,9,{},9,0,0,0,0,0,0,0,0,0,0])
Test.assert_equals(move_zeros([0,1,None,2,False,1,0]),[1,None,2,False,1,0,0])
Test.assert_equals(move_zeros(["a","b"]),["a","b"])
Test.assert_equals(move_zeros(["a"]),["a"])
Test.assert_equals(move_zeros([0,0]),[0,0])
Test.assert_equals(move_zeros([0]),[0])
Test.assert_equals(move_zeros([False]),[False])
Test.assert_equals(move_zeros([]),[])
我的输出:
- Teste通过了
- [9，0.0，9，1，2，1，1，0.0，3，1，9，9，0，0，0，0，0，0，0，0]应该等于[ 9，9，1，2，1，1，1，3，1，9，9，0，0，0，0，0，0，0，0，0，0]
- Teste通过了
- Teste通过了
- Teste通过了
- Teste通过了
- Teste通过了
- Teste通过了
- Teste通过了
- Teste通过了
- Teste通过了
- Teste Passed
- [9, 0.0, 9, 1, 2, 1, 1, 0.0, 3, 1, 9, 9, 0, 0, 0, 0, 0, 0, 0, 0] should equal [9, 9, 1, 2, 1, 1, 3, 1, 9, 9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
- Teste Passed
- Teste Passed
- Teste Passed
- Teste Passed
- Teste Passed
- Teste Passed
- Teste Passed
- Teste Passed
- Teste Passed
我的问题:
我相信它会失败，因为0.0不是0.但是我正在努力理解我该怎么写. 我正在开始编码，因此我的代码看起来不像pythonic，但是我想那是我必须要实践的事情
I believe it fails because 0.0 is not 0. But I'm struggling to understand how can i write that. I'm begining coding so my code doesn't look pythonic but i guess that's something I must pratice
推荐答案
使用:
n == 0 and n is not False
根据 https://docs.python.org/3/library/stdtypes .html
共有三种不同的数字类型:整数，浮点数和复数.此外，布尔值是整数的子类型
There are three distinct numeric types: integers, floating point numbers, and complex numbers. In addition, Booleans are a subtype of integers
和
不同类型的对象(不同的数字类型除外)永远不会比较相等
Objects of different types, except different numeric types, never compare equal
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