# 使用列表推导式

代码：

```python
variable=[out_exp_res for out_exp_res in [1,2,3,4,5,6,7,8] if out_exp_res %2==0]
print(variable)
squares=[x**2 for x in range(10) if x %2==0]
print(squares)
```

结果：

```python
[2, 4, 6, 8]
[0, 4, 16, 36, 64]
```

视频：

```
wait
```

代码：

```python
values=['1','2','A','3','-','N/A']
def is_int(a):
    try:
        x=int(a)
        return True
    except ValueError:
        return False
print('函数','-'*50)
int_values=list(filter(is_int,values))
print(int_values)

print('列表推导','-'*50)
int_values2=[v for v in values if is_int(v)]
print(int_values2)
```

结果：

```python
函数 --------------------------------------------------
['1', '2', '3']
列表推导 --------------------------------------------------
['1', '2', '3']
```

视频：

```
wait
```


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