python pickle

 >>> 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']
 >>>