Explore
For Enterprise
Join for Free
Log In

검색
포 엔터프라이즈 (For Enterprise)
로그인
무료 회원 가입

Passing Functions as Arguments

Loading...

Learn to Program: Crafting Quality Code

토론토 대학교

4.6(472개의 평가) | 38K명의 학생이 등록함

Not all programs are created equal. In this course, we'll focus on writing quality code that runs correctly and efficiently. We'll design, code and validate our programs and learn how to compare programs that are addressing the same task.

강의 계획서 보기

배우게 될 기술

Software Testing, Unit Testing, Python Programming, Object-Oriented Programming (OOP)

검토

4.6(472개의 평가)

5 stars
348 ratings
4 stars
94 ratings
3 stars
21 ratings
2 stars
4 ratings
1 star
5 ratings

TL

May 03, 2019

The instructors' explanations were excellent. Topic regarding algorithm can have a little bit of background, because jumping into that right away was a little confusing.

BV

May 04, 2017

I have started around 20 MOOCs, but it the first one which I have finished. The course is very practical and I recommend it to all who has some python experience.

수업에서

Week 5

Passing Functions as Arguments2:28

Assigning Parameters Default Values4:19

Dealing with Exceptional Situations 7:26

강사:

Jennifer Campbell
Associate Professor, Teaching Stream
Paul Gries
Associate Professor, Teaching Stream

스크립트

Like everything else in Python, functions are objects. Because functions are objects, we can supply the as arguments in a function call. Here is a function called function_runner. It has one perimeter f. f's type is function. function_runner calls x. And as you can see in the body, that's exactly what it does. Here, we define a function that were going to pass the function_runner in just a little bit. Because this is just a demonstration, all we'll do inside here is, print that the function was called. Let's add one more function just like this one. Here, call function_runner supplying function_1 as the argument. Now, we'll trace execution of this program. When the program starts running, we get a frame for the module. Every function definition creates a variable with the name of the function that contains the memory address of a function object that contains all the details of what it means to run that function when it's called. [UNKNOWN] happens when we define function 1, then function 2. Then, we reach the name equals main if statement, and inside that is a call on function_runner. To execute the function call, we evaluate the argument. That's just the memory address of the function object. And then Python creates a frame for the function. Parameter f is inside that frame. It is assigned to the memory address of the function that was passed as an argument. To execute function_runner, we just execute the statement in its body which is a call on function f. We draw fame for that function. Were going to write f slash function_1 here, although it turns out that the name of the function is taken from the function definition. In the body of function_1, we have a call on function print. That's the end of function_1, so we exit, that brings us back to function_runner. We've just completed the call on function f, that's the end of function_runner, so we exit it. That brings us back to the main program, we're at the end of it, so we exit the program. When we traced this, we reached one call on function print. When we run it, we get the output that we expect. When we change function_1 to function_2, we see that we end up at this call on function print.

Coursera 카탈로그 살펴보기

무료로 참여해 맞춤화된 추천, 업데이트 및 제안을 받아보세요.

Coursera provides universal access to the world’s best education, partnering with top universities and organizations to offer courses online.

© 2019 Coursera Inc. All rights reserved.

Coursera
소개
리더십
직업
카탈로그
수료증
MasterTrack™ 수료증
학위
포 엔터프라이즈 (For Enterprise)
정부용
캠퍼스용

커뮤니티
Learners
Partners
Developers
Beta Testers
Translators

연결
블로그
Facebook
Linkedin
Twitter
Instagram
YouTube
기술 블로그

기타
조건
개인정보 보호
도움말
접근성
보도 자료
문의하기
디렉토리
계열사