python►notes

python common notes

package

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import pathlib
import sys
from os.path import dirname, abspath

PROJECT_BASE_PATH = dirname(abspath(pathlib.Path(__file__).absolute()))
sys.path.append(PROJECT_BASE_PATH)

path

判断路径是否存在

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os.path.exists('path')

获取 Home 路径

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from pathlib import Path
Path.home() # 用户目录

json

序列化类

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json.dumps(obj, default=vars)  # 使用 vars 序列化对象, 打印对象的所有属性

multiprocessing

共享自定义对象

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class A():
	pass

AProxy = MakeProxyType('A', public_methods(A))
setattr(multiprocessing.managers, 'A', AProxy)
SyncManager.register('A', A, AProxy)
manager = SyncManager()
manager.start()
shared_a = manager.A()