Python-100-Days/面试指南.md

面试指南

基础知识

1. 下面的代码会输出什么。

      
   list1 = [1, 2, 3, 4]
      
   list2 = [i for i in list1 if i > 2]
   print(list2)
      
   list3 = [i for i in list1 if i % 2]
   print(list3)
      
   dict1 = {x: x ** 2 for x in (2, 4, 6)}
   print(dict1)
      
   dict2 = {x: f'item{x ** 2}' for x in (2, 4, 6)}
   print(dict2)
      
   set1 = {x for x in 'hello world' if x not in 'abcdefg'}
   print(len(set1))
   

2. 下面的代码会输出什么。

      
   num = 100
      
      
   def foo():
   num = 200
      
      
   def bar():
   print(num)
      
      
   bar()
   foo()
   bar()
   

3. 如何修改下面的Python代码，才能够输出“foo in father”？

      
   class Father(object):
      	
   	def foo(self):
   		print('foo in father.')
      
      
   class Son(object):
      	
   	def foo(self):
   		print('foo in son.')
      
      
   obj = Son()
   obj.foo()