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Content Summary

1.__str__

2.os.path Related methods

1.__str__

Let's first define a Student class and print an instance:

1 class Student (object): 2     def __init__ (self, name): 3         Self.name = name45print Student ('Michael' )

<__main__.Student object at 0x109afb190>

Print out a bunch <__main__.Student object at 0x109afb190> , not pretty.

How can you print it well? Just define a good __str__() method and return a nice-looking string:

class Student (object):     def __init__ (self, name):         = name    def__str__(self):        return  self.name Print (Student ('Michael'))

Michael

This kind of printed example, not only good-looking, but also easy to see the important data inside the instance.

2.os.path Related methods

  #os. Path.dirname () to remove the file name and return to the path where the directory is located  
 # os.path.join () is used to combine parts of the separation into one pathname  
  #os. Path.abspath () returns the path normalized absolute path 
 
  

Import= Os.path.dirname (Os.path.dirname (Os.path.abspath (__file__' ) DB'admin' db '  course')

Python Knowledge Point Supplements