• 得到下标用for迭代

  for i, char in enumerate("haha"):
    print(i, char[i])
  

• pip2 和 pip3共存

  pyhon2 -m pip install xxx
  

• 多字符分隔

  import re
  s = 'as,as;asd.asd'
  res = re.split('[,;.]*', s)
  

• configparser (python3)

  config = configparser.ConfigParser(interpolation=configparser.ExtendedInterpolation())
  config.read('example.ini')
  config.sections()
  value = config['section']['key']
  

  读取配置文件

  [TICKscript1]
    script = "house1.tick"
    task = "house1"
    type = "stream"
    database = "house"
    retention_policy = "default"
    test = ${script}
    test2 = ${influxdb:hh}
  

• 函数参数 ``` def test(*a): print(a)

  test(1, 2) a = (1, 2)

def test2(**)

* end

builtins.end = None

* anaconda

conda create –name tf_test python=3.6 source activate tf_test

* future
```python
from __future__ import division 之后：
23/6 # 得 3.8333333333333335

• 在虚拟环境中添加juypter kenerl

  source activate tf_test
  pip install ipykernel
  python -m ipykernel install --user --name=new_kenerl_name
  # juypter notebook
  # 在juypter notebook中选择Kenerl