What does import attr mean in Python?

Question

In Python code, I foudnd this line. What does it mean?

import attr

Here is an example:

import collections

import attr
import tensorflow as tf

Answer 1

Most probably it is using attr package Check https://www.attrs.org/en/stable/examples.html

Answer 2

attrs is the Python package that gives you a class decorator and a way to declaratively define the attributes on that class:. An example is given below:-

import attr 
@attr.s
class SomeClass(object):
  a_number = attr.ib(default=42)    
  list_of_numbers = attr.ib(factory=list) 
  def hard_math(self, another_number):   
     return self.a_number 
     +sum(self.list_of_numbers) * 
     another_number 

For a detailed explanation visit https://pypi.org/project/attrs/ .