python转为一维数组
时间: 2023-08-27 09:16:40 浏览: 90
1.6 编程基础之一维数组 python版.zip
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可以使用多种方法将二维数组转换为一维数组,以下是一些常用的方法:
方法1:使用numpy的flatten函数
```python
import numpy as np
mulArrays = [[1,2,3],[4,5,6],[7,8,9]]
result = list(np.array(mulArrays).flatten())
print(result)
```
方法2:使用numpy的reshape和concatenate函数
```python
import numpy as np
mulArrays = [[1,2,3],[4,5,6],[7,8,9]]
result = list(np.concatenate(np.array(mulArrays).reshape((-1,1),order="F")))
print(result)
```
方法3:使用sum()函数
```python
mulArrays = [[1,2,3],[4,5,6],[7,8,9]]
result = sum(mulArrays, [])
print(result)
```
方法4:使用列表推导式
```python
mulArrays = [[1,2,3],[4,5,6],[7,8,9]]
result = [i for arr in mulArrays for i in arr]
print(result)
```
方法5:使用reduce和operator.add函数
```python
from functools import reduce
import operator
mulArrays = [[1,2,3],[4,5,6],[7,8,9]]
result = reduce(operator.add, mulArrays)
print(result)
```
方法6:使用itertools的chain函数
```python
from itertools import chain
mulArrays = [[1,2,3],[4,5,6],[7,8,9]]
result = list(chain.from_iterable(mulArrays))
print(result)
```
此外,还可以使用循环来实现二维数组转换为一维数组的功能。例如,以下是一个使用循环的示例:
```python
a = [[1,2,3], [5, 8], [7,8,9]]
result = []
for sublist in a:
for item in sublist:
result.append(item)
print(result)
```
另外,还可以使用递归函数来实现二维数组转换为一维数组的功能。例如,以下是一个使用递归函数的示例:
```python
def flatten(a):
if not isinstance(a, (list, )):
return [a]
else:
result = []
for item in a:
result.extend(flatten(item))
return result
a = [[[1,2],3],[4,[5,6],[7,8,9]]
result = flatten(a)
print(result)
```
以上是一些常用的方法来实现二维数组转换为一维数组的功能,你可以根据自己的需求选择其中的一种方法来使用。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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