http://www.keyfc.net/bbs/tools/tudoucode.aspx 佛系加密

标配： 拖鞋+大裤衩

```python
def rows_reader(filepath, size=10):
with open(filepath) as f:
tmp = []
for line in f:
tmp.append(line)
if len(tmp) >= size:
yield tmp
tmp = []
if tmp:
yield tmp


for rows in rows_reader('m.md', size=10):
print(rows)

```

姨妈贴又来了

False == None
相当于 False.__eq__(None)

```
>>> False.__eq__(None)
NotImplemented
>>> r = False.__eq__(None)
>>> type(r)
<class 'NotImplementedType'>
```
而 NotImplemented 则参考下面链接的文章

参考：
https://stackoverflow.com/questions/3588776/how-is-eq-handled-in-python-and-in-what-order 　

https://stackoverflow.com/questions/878943/why-return-notimplemented-instead-of-raising-notimplementederror

没有用户啊，肯定要做啊，不做的话没有用户。抛弃 IE8 是不可能的，这辈子都不能抛弃 IE8。


```
SELECT CONCAT(LEFT(mobile, 3), "****", RIGHT(mobile, 4)) FROM user_info;
```

不用 @staticmethod 可以这样做，把这些验证方法全都写到一个文件里，import 进来，然后 模块名.方法名 就好了。

from jsonschema import validate

schema = {
"type": "object",
"properties": {
"phone_number": {
"type": "string",
"pattern": "^1\d{10}$",
"description": "手机号码"
},
"username": {
"type": "string",
"pattern": "^[\w]{4,20}$",
"description": "用户名"
}
},
"required": ["phone_number", "username"]
}

param = {'phone_number': '12345678910', 'username': '10086'}
try:
validate(param, schema)
except Exception as e:
print(e.message)