📅  最后修改于: 2023-12-03 14:44:53.871000             🧑  作者: Mango
Oparaid is a python library for functional programming. It provides several functions to manipulate lists, tuples, and dictionaries. The library was inspired by Haskell and Clojure.
You can install Oparaid using the following command:
pip install oparaid
To use Oparaid, you need to import it into your Python script:
import oparaid as op
You can manipulate lists using the following functions:
The map
function applies a function to each element of a list and returns a new list.
numbers = [1, 2, 3, 4, 5]
squares = op.map(lambda x: x * x, numbers)
print(squares) # [1, 4, 9, 16, 25]
The filter
function returns a new list containing only the elements of a list for which a function returns True
.
numbers = [1, 2, 3, 4, 5]
even_numbers = op.filter(lambda x: x % 2 == 0, numbers)
print(even_numbers) # [2, 4]
The reduce
function applies a function to the elements of a list recursively to compute a single value.
numbers = [1, 2, 3, 4, 5]
sum_numbers = op.reduce(lambda acc, x: acc + x, numbers, 0)
print(sum_numbers) # 15
You can manipulate tuples using the following functions:
The first
function returns the first element of a tuple.
person = ('John', 'Doe', 30)
first_name = op.first(person)
print(first_name) # 'John'
The second
function returns the second element of a tuple.
person = ('John', 'Doe', 30)
last_name = op.second(person)
print(last_name) # 'Doe'
The third
function returns the third element of a tuple.
person = ('John', 'Doe', 30)
age = op.third(person)
print(age) # 30
You can manipulate dictionaries using the following functions:
The assoc
function returns a new dictionary with a key and a value added.
person = {'first_name': 'John', 'last_name': 'Doe'}
new_person = op.assoc(person, 'age', 30)
print(new_person) # {'first_name': 'John', 'last_name': 'Doe', 'age': 30}
The dissoc
function returns a new dictionary with a key removed.
person = {'first_name': 'John', 'last_name': 'Doe', 'age': 30}
new_person = op.dissoc(person, 'age')
print(new_person) # {'first_name': 'John', 'last_name': 'Doe'}
Oparaid is a powerful library for functional programming in Python. It provides several functions to manipulate lists, tuples, and dictionaries in a functional way, similar to Haskell and Clojure. By using Oparaid, you can write more expressive and concise code.