importlib.import_module(name, package=None):导入一个模块 importlib.reload(module):重新载入已导入的模块
from importlib import import_module, reload
import test_import
a = import_module(name="test_import") # 已被成功导入
print(reload(test_import))
# <module 'test_import' from'/Users/zaygee/work_script/Script/python_test/test_import.py'>