Python AlphaBeta

packages

• pendulum
  时间

• tomlkit
  处理 toml

• pygame
  播放音乐视频

• poetry
  venv

• PySnooper
  debug module

JSON & pickle

# json
data = None
def load_it(json_path):
    with open(json_path, "r", encoding="utf-8") as file:
        data = json.load(file)
    return data

def save_it(json_path, data):
    with open(json_path, "w", encoding="utf-8") as file:
        json.dump(data, file, ensure_ascii=False)

# pickle
data = None
with open("file.pickle", 'rb') as f:
    data = pickle.load(f)

with open("file.pickle", 'wb') as f:
    pickle.dump(data, f)

dict to json

data = None
json.dumps(data)

Series DF to JSON

ss = pd.Series()
ss.to_json()

df = pd.DataFrame()
df.to_json() # for column
df.T.to_json() #for row

df.T.to_json(force_ascii=False) # ZH ascii

pd.read_json(jj,orient="index")

json to dict

data_dict = json.loads(json_str)
json_str = json.dumps(data_dict)

DF

#方法1：
data['升阻比']=data['升力系数']/data['阻力系数']

#方法2：
#data.eval('升阻比=升力系数/阻力系数',inplace=True)

#方法3：
#data['升阻比']=data.apply(lambda x:x['升力系数']/x['阻力系数'],axis=1)

#方法4：
#data['升阻比']=data.apply(lambda x:x[1]/x[2],axis=1)


se_tmp = df['name'].apply(lambda x:x[:1])

projects

import os
import sys
file = os.getcwd()
BASE_DIR = os.path.dirname(os.path.abspath(file))
sys.path.append(BASE_DIR)

语法糖

__name__ , __file__

__name__ 是 package 的名，立即执行的 __name__ == '__main__'
__file__ 是当前文件的相对路径的文件名
os.getcwd()会得到的是运行文件的起始位置

jump to IPython

1. ipdb

   import ipdb
   ipdb.set_trace()

2. embed

   from IPython import embed
   embed()

static http server

python -m http.server 9000

isolated

pip

1. copy runtime to folder runtime
2. use local runtime python to run python & pip

   runtime/python -m pip install **
   runtime/python script.py

poetry

poetry config --list
poetry config cache-dir "D:\\Portable\\Python\\pypoetry"
poetry config virtualenvs.in-project true --local