>>> import pickle

 >>> m_list=['',2,'asa']

 >>> m_list

 ['', 2, 'asa']

 >>> m_file=open('my_file.pkl','wb')

 >>> pickle.dump(m_list,m_file)

 >>> pickle.close()

 Traceback (most recent call last):

   File "<pyshell#16>", line 1, in <module>

     pickle.close()

 AttributeError: 'module' object has no attribute 'close'

 >>> my_file.close()

 Traceback (most recent call last):

   File "<pyshell#17>", line 1, in <module>

     my_file.close()

 NameError: name 'my_file' is not defined

 >>> m_file.close()

 >>> m_file=open('my_file.pkl','rb')

 >>> m_list2=pickle.load(m_file)

 >>> print (m_list2)

 ['', 2, 'asa']

 >>>