Скачать или смотреть Turn 4 lines of code into 1 with this python syntax

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in python, you can often condense multiple lines of code into a single line using various techniques such as list comprehensions, generator expressions, or by using the `join()` method. this not only makes your code more concise but can also improve readability once you're familiar with the syntax.

let's explore how to turn four lines of code into one line using list comprehensions as an example.

example scenario

suppose you want to create a list of squares of even numbers from 1 to 10. here's how you might typically do it in four lines of code:



turning it into one line

you can accomplish the same task using a list comprehension in one line of code:



breakdown of the one-liner

1. **list comprehension**: the syntax `[expression for item in iterable if condition]` allows you to create lists in a single line.
2. **expression**: `i ** 2` is the expression that gets evaluated and added to the list.
3. **iterable**: `range(1, 11)` is the iterable that provides the numbers from 1 to 10.
4. **condition**: `if i % 2 == 0` filters the numbers, ensuring only even numbers are processed.

another example with string manipulation

let's say you want to convert a list of strings to uppercase and filter out the ones that are shorter than 3 characters. the typical approach might look like this:



#### one-liner version

using a list comprehension, you can condense this to one line:



conclusion

using list comprehensions or similar constructs in python allows you to transform multiple lines of code into a single line efficiently. this not only saves space but also makes your code cleaner and easier to understand once you are familiar with the syntax. however, it's essential to balance conciseness with readability; overly complex one-liners can become difficult to understand.

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