Qiita Teams that are logged in
You are not logged in to any team

Log in to Qiita Team
Community
OrganizationEventAdvent CalendarQiitadon (β)
Service
Qiita JobsQiita ZineQiita Blog
17
Help us understand the problem. What are the problem?

More than 3 years have passed since last update.

@sporty

困ったときのpartial

Pythonの隠れ便利モジュール、functools

特にfunctools.partial関数めちゃくちゃ使います。

一部の引数を固定した関数を返す、といえばいいのか説明が難しいんですが。

sample.py
from functools import partial


def sayhello(message=u"hello", to=u"ryo"):
    print(u"{1}さん、{0}".format(message, to))


def main():
    sayhello()

    konnnichiwa = partial(sayhello, u"こんにちわ")

    konnnichiwa("nishizawa")
    konnnichiwa("takahashi")


if __name__ == "__main__":
    main()

を実行すると

> python sample.py
ryoさん、hello
nishizawaさん、こんにちわ
takahashiさん、こんにちわ

となります。

PySideのコールバック関数などをやっつけるときに活躍します

Why not register and get more from Qiita?
  1. We will deliver articles that match you
    By following users and tags, you can catch up information on technical fields that you are interested in as a whole
  2. you can read useful information later efficiently
    By "stocking" the articles you like, you can search right away
17
Help us understand the problem. What are the problem?