# 


 Python 

 Google 

 [] 

 `C[ET]O`  CEO  CTO  `[ET]`  E  T  `[a-z]` , - `[0-9a-fA-F]` ,

 [] "OR"

```Python

import re
a = 'uav,ubv,ucv,uwv,uzv,ucv,uov'

# 

#  u  v  a  b  c 
findall = re.findall('u[abc]v', a)
print(findall)
#  - 
l = re.findall('u[a-c]v', a)
print(l)

#  u  v  a  b  c 
re_findall = re.findall('u[^abc]v', a)
print(re_findall)

```



```txt
['uav', 'ubv', 'ucv', 'ucv']
['uav', 'ubv', 'ucv', 'ucv']
['uwv', 'uzv', 'uov']
```

 [  ^`q[^u]`  q u  q u 

 `\d`,, [0-9]

```Python
import re

a = 'uav_ubv_ucv_uwv_uzv_ucv_uov&123-456-789'

# 

# \d  [0-9] ,
# \D  [^0-9]  
findall1 = re.findall('\d', a)
findall2 = re.findall('[0-9]', a)
findall3 = re.findall('\D', a)
findall4 = re.findall('[^0-9]', a)
print(findall1)
print(findall2)
print(findall3)
print(findall4)

# \w  [A-Za-z0-9_]
findall5 = re.findall('\w', a)
findall6 = re.findall('[A-Za-z0-9_]', a)
print(findall5)
print(findall6)

```



```txt
['1', '2', '3', '4', '5', '6', '7', '8', '9']
['1', '2', '3', '4', '5', '6', '7', '8', '9']
['u', 'a', 'v', '_', 'u', 'b', 'v', '_', 'u', 'c', 'v', '_', 'u', 'w', 'v', '_', 'u', 'z', 'v', '_', 'u', 'c', 'v', '_', 'u', 'o', 'v', '&', '-', '-']
['u', 'a', 'v', '_', 'u', 'b', 'v', '_', 'u', 'c', 'v', '_', 'u', 'w', 'v', '_', 'u', 'z', 'v', '_', 'u', 'c', 'v', '_', 'u', 'o', 'v', '&', '-', '-']
['u', 'a', 'v', '_', 'u', 'b', 'v', '_', 'u', 'c', 'v', '_', 'u', 'w', 'v', '_', 'u', 'z', 'v', '_', 'u', 'c', 'v', '_', 'u', 'o', 'v', '1', '2', '3', '4', '5', '6', '7', '8', '9']
['u', 'a', 'v', '_', 'u', 'b', 'v', '_', 'u', 'c', 'v', '_', 'u', 'w', 'v', '_', 'u', 'z', 'v', '_', 'u', 'c', 'v', '_', 'u', 'o', 'v', '1', '2', '3', '4', '5', '6', '7', '8', '9']
```