10 Interesting Python Code Tricks

In python we can return multiple values -

1. It's very unique feature of Python that returns multiple value at time. Python

   def GFG():
       g = 1 
       f = 2
       return g, f 
   
   x, y = GFG()
   print(x, y)
   

   
   Output

   (1, 2)
   

2. Allows Negative Indexing: Python allows negative indexing for its sequences. Index -1 refer to the last element, -2 second last element and so on. Python

   my_list = ['geeks', 'practice', 'contribute']
   print(my_list[-1])
   

   
   Output

   contribute
   

3. Combining Multiple Strings. We can easily concatenate all the tokens available in the list. Python

   my_list = ['geeks', 'for', 'geeks']
   print(''.join(my_list))
   

   
   Output

   geeksforgeeks
   

4. Swapping is as easy as none. See, How we could swap two object in Python. Python

   x = 1
   y = 2
   
   print('Before Swapping')
   print(x, y)
   
   x, y = y, x
   print('After Swapping')
   print(x, y)
   

   
   Output

   Before Swapping
   (1, 2)
   After Swapping
   (2, 1)
   

5. Want to create file server in Python We can easily do this just by using below code of line. Python

   python -m SimpleHTTPServer # default port 8080
   

   You can access your file server from the connected device in same network.
6. Want to know about Python version you are using(Just by doing some coding). Use below lines of Code - Python

   import sys
   print("My Python version Number: {}".format(sys.version))  
   

   
   Output

   My Python version Number: 2.7.12 (default, Nov 12 2018, 14:36:49) 
   [GCC 5.4.0 20160609]
   

   It prints version you are using.
7. Store all values of List in new separate variables. Python

   a = [1, 2, 3]
   x, y, z = a 
   print(x)
   print(y)
   print(z) 
   

   
   Output

   1
   2
   3
   

8. Convert nested list into one list, just by using Itertools one line of code. Example - [[1, 2], [3, 4], [5, 6]] should be converted into [1, 2, 3, 4, 5, 6] Python

   import itertools 
   a = [[1, 2], [3, 4], [5, 6]]
   print(list(itertools.chain.from_iterable(a)))
   

   
   Output

   [1, 2, 3, 4, 5, 6]
   

9. Want to transpose a Matrix. Just use zip to do that. Python

   matrix = [[1, 2, 3], [4, 5, 6]]
   print(zip(*matrix))
   

   
   Output

   [(1, 4), (2, 5), (3, 6)]
   

10. Want to declare some small function, but not using conventional way of declaring. Use lambda. The lambda keyword in python provides shortcut for declare anonymous function. Python

    subtract = lambda x, y : x-y
    subtract(5, 4)