Python Import and package with sample

  1. Everything from module in package

Create a folder structure as below

import everything from service1 but only api1 and api2

service1.pydef api1():    print('api1')def api2():    print('api2')def internal():    print('internal func')__all__ = ["api1","api2"]
first_pkg_test.pyfrom first_pkg.api.service1 import *if __name__ == “__main__”: api1() api2() #internal() #this will throw error

Import certain functions from service2 and lib
def api3():
first_pkg_test.pyimport first_pkg.api.service2 as service2if __name__ == "__main__": service2.api3()
lib.pydef lib1(): print('lib1')
first_pkg_test.pyimport first_pkg.lib as libif __name__ == "__main__": lib.lib1()

Import same level py file

first_pkg_lib.pydef pkg_lib_outside():    print('pkg lib outside')
first_pkg_test.pyfrom first_pkg_lib import pkg_lib_outsideif __name__ == "__main__": pkg_lib_outside()

Consolidate everything into package level export and import * file (under first_pkg) :
from .lib import lib1from .api.service1 import api1, api2from .api.service2 import api3__all__ = ['lib1','api1','api2','api3']
In first_pkg_test.pyfrom first_pkg import *if __name__ == "__main__":lib1()api1()api2()api3()

Make module executable from python command

Load modules by string name

print('package1 loaded')import importlibservice = importlib.import_module('api.service1')service.api1()
Python3 first_pkg




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