利用Python命令行传递实例化对象的方法

import subprocess
class Student(object):
 def __init__(self):
  self.name = 'Chris'
  self.age = 30
 def __str__(self):
  return '\n'.join('{}:{}'.format(k_, v_) for k_, v_ in self.__dict__.items()
       if not k_.startswith('_'))
def start_script():
 # 我们把实例化的过程延迟
 commands = ['python3', '/home/chris/Projects/Python/movie_wisdom/script.py',
    'Student()']
 subprocess.call(commands)
if __name__ == '__main__':
 start_script()

from starter import Student
def main():
 student_obj = sys.argv[-1]
 # 进行实例化，从而达到“传递”对象的目的
 print(eval(student_obj))
main()

def pickle_dumps_to_str(obj):
 try:
  return base64.encodebytes(pickle.dumps(obj)).decode()
 except pickle.PicklingError:
  pass
def pickle_loads_from_str(obj_str):
 try:
  return pickle.loads(base64.decodebytes(obj_str.encode()))
 except pickle.UnpicklingError:
  pass

def start_script():
 student = Student()
 student.name = 'Mary'
 # 此时传递的将是序列化后的 Student 对象实例（注意和使用 `eval` 的区别）
 commands = ['python3', '/home/chris/Projects/Python/movie_wisdom/script.py',
    pickle_dumps_to_str(student)]
 subprocess.call(commands)

def main():
 student_obj = sys.argv[-1]
 # 载入 Student 对象实例
 print(pickle_loads_from_str(student_obj))