A Python list comprehension is a method for creating lists based on other lists, sequences, or iterators.
- [Instructor] A list comprehension is a list…created based on another list or iterator.…Here in Komodo, I've opened a working copy…of comprehension.py, from chapter eight…of the exercise files.…This list comprehension is a very common technique…in Python, so it's good to understand it.…Here on line five, I've created a sequence,…based on the range function, the range generator,…so it will be zero to 10.…If I save and run this,…you'll see it says zero through 10 in our output.…
I have this little print_list,…which is for printing our sequence.…And let's go ahead and create a list comprehension.…I'll create a second sequence, I'll call it seq2.…And this one will be a list and it'll be a list…of each of the elements of our first list,…multiplied by two.…So I'll just say x times two for x in seq.…It's as simple as that.…And when I go ahead and print this…with our print_list, you'll see that…it prints each of the elements of the first list…multiplied by two.…
So we now have a separate sequence,…which is the first sequence multiplied by two.…
- Python anatomy
- Types and values
- Conditionals and operators
- Building loops
- Defining functions
- Python data structures: lists, tuples, sets, and more
- Creating classes
- Handling exceptions
- Working with strings
- File input/output (I/O)
- Creating modules
- Integrating a database with Python db-api
Skill Level Intermediate
Python: Programming Efficientlywith Michele Vallisneri2h 15m Intermediate
2. Language Overview
3. Types and Values
8. Structured Data
11. String Objects
12. File I/O
13. Built-in Functions
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