One of the strengths of a simple (yet powerful) language like Python is to achieve the same with less lines of code.
A “Pythonic” concept that proves this is list comprehensions
Simply put, it enables you concisely create a list in a single line of code based on some logic presented as an iterable object
Syntax is –
<to_be_create_list_name> = [i for i in <logic to create an iterable object(s)>]
And they powerful thing is that conditionals can be used in the above syntax of create an iterable object based on some conditional logic
Example –
You are given a list that has blank space characters in it, find out at which positions in the list do those blank space chars exist ? and create a new list with to hold those positions ( to be used downstream for a business rule)
Solution # 1 –
My original bloatey way to achieve it was
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| list_2 = [] #create a blank to be populated list | |
| for x in range(len(list_1)): # loop through the lenght of the original list | |
| if list_1[x] == ' ': # if the value at that particular index is a blank space | |
| list_2.append(x) # add the index to the new list | |
| print(list_2) |
Solution # 2 –
A much more concise way discovered (through googling) that uses list comprehension 😉
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| list_2 = [x for x in range(len(list_1)) if list_1[x] == ' '] |
Note – how the condition to check for blank chars and the loop to iterate through the link of the list, have been combined into a single line
Python 3.0, you beauty !
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