Udemy Python Bootcamp Day 057
Using Jinja to Produce Dynamic HTML Pages
Jinja
The HTML files can actually act as a template as long as we know how to work with a templating language. The tmplating languagethat we're going to use is called Jinja.
It allows us to use some syntax like {}, %, or {{}} in order to specify inside the HTML file which parts should actually be evaluated as Python code.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>My Website</title>
</head>
<body>
<h1>Hello, World!</h1>
<h2>{{ 5 * 6 }}</h2>
</body>
</html>
from flask import Flask, render_template
import random
import datetime
app = Flask(__name__)
@app.route('/')
def home():
random_number = random.randint(1, 10)
current_year = datetime.datetime.now().year
return render_template("index.html", num=random_number, year=current_year)
if __name__ == "__main__":
app.run(debug=True)The most important thing is I want to be able to send this random number over to my index.html and incorporate it into this template when I render it.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>My Website</title>
</head>
<body>
<h1>Hello, World!</h1>
<h2>{{ 5 * 6 }}</h2>
<h3>Random number: {{ num }}</h3>
</body>
<footer>
<p>©Copyright {{ year }}. Built by Awesome Kim.</p>
</footer>
</html>
Combining Jinja Templating with APIs
guess.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Guess</title>
</head>
<body>
<h1>Hey {{ name.title() }},</h1>
<h2>I think you are {{ gender }}</h2>
<h3>And maybe {{ age }} years old.</h3>
</body>
</html>.py
import requests
AGE_ENDPOINT = "https://api.agify.io/?name="
GENDER_ENDPOINT = "https://api.genderize.io/?name="
@app.route('/guess/<name>')
def guess(name):
gender_response = requests.get(GENDER_ENDPOINT + name)
gender = gender_response.json()["gender"]
age_response = requests.get(AGE_ENDPOINT + name)
age = age_response.json()["age"]
return render_template("guess.html", name=name, gender=gender, age=age)
미쳐부러따.. 내가 해내버렸다......
Multiline Statements with Jinja
@app.route('/blog')
def blog():
blog_url = "https://api.npoint.io/2fa8f877104b260d1b8b"
response = requests.get(blog_url)
all_posts = response.json()
return render_template("blog.html", posts=all_posts)blog.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Blog</title>
</head>
<body>
{% for blog_post in posts: %}
<h1>{{ blog_post["title"] }}</h1>
<h2>{{ blog_post["subtitle"] }}</h2>
{% endfor %}
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Blog</title>
</head>
<body>
{% for blog_post in posts: %}
{% if blog_post["id"] == 2: %}
<h1>{{ blog_post["title"] }}</h1>
<h2>{{ blog_post["subtitle"] }}</h2>
{% endif %}
{% endfor %}
</body>
</html>
URL Building with Flask
@app.route('/blog/<num>')
def get_blog(num):
print(num)
blog_url = "https://api.npoint.io/2fa8f877104b260d1b8b"
response = requests.get(blog_url)
all_posts = response.json()
return render_template("blog.html", posts=all_posts)index.html
<a href="{{ url_for('get_blog', num=3) }}">Go To Blog</a>
Blog Capstone Project Part 1 - Templating
이렇게 만드는건 어렵지 않게 했는데
Read버튼 눌러서 다른 route호출하는 거에서 완전히 실패함
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<link href="https://fonts.googleapis.com/css2?family=Raleway" rel="stylesheet">
<link rel="stylesheet" href="../static/css/styles.css">
</head>
<body>
<div class="wrapper">
<div class="top">
<div class="title"><h1>My Blog</h1></div>
</div>
{% for post in posts: %}
<div class="content">
<div class="card">
<h2>{{ post["title"] }}</h2>
<p>{{ post["subtitle"] }}</p>
<a href="{{ url_for('show_post', index=post.id) }}">Read</a>
</div>
</div>
{% endfor %}
</div>
</body>
<footer>
<p>Made with ♥️ in London.</p>
</footer>
</html>index.html에서 href="{{ url_for('show_post', index=post.id) }}"이렇게 작성하는 걸 상상도 못함..
html에서 url호출시 main.py에 있는 함수 불러올 수 있음
main.py
from flask import Flask, render_template
import requests
from post import Post
posts = requests.get("https://api.npoint.io/e82dfd36fe5719f2df6f").json()
post_objects = [Post(post["id"], post["title"], post["subtitle"], post["body"]) for post in posts]
app = Flask(__name__)
@app.route('/')
def home():
return render_template("index.html", posts=posts)
@app.route('/post/<int:index>')
def show_post(index):
requested_post = None
for blog_post in post_objects:
if blog_post.id == index:
requested_post = blog_post
return render_template("post.html", post=requested_post)
if __name__ == "__main__":
app.run(debug=True)posts에 있는 item들을 리스트로 만들어서 사용하는 것도 생각하지 못함
사실 def show_post(index)가 왜 저렇게 작성됐는지도 완벽하게 이해하지 못함..
id를 blog_post.id 이렇게 호출하는 것도 이유를 모르겠음..
+) 2022.04.06
Post()Class 호출시 속성값 반환이라 이렇게 작성함.
대충 이번 프로젝트는 엉망이라는 얘기..
post.py
class Post:
def __init__(self, post_id, title, subtitle, body):
self.id = post_id
self.title = title
self.subtitle = subtitle
self.body = body역시 OOP작성하는 것도,, 이렇게 __init__으로 값만 호출하는 구나,,
post.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<link href="https://fonts.googleapis.com/css2?family=Raleway" rel="stylesheet">
<link rel="stylesheet" href="../static/css/styles.css">
</head>
<body>
<div class="wrapper">
<div class="top">
<div class="title"><h1>My Blog</h1></div>
</div>
<div class="content">
<div class="card">
<h1>{{ post.title }}</h1>
<h2>{{ post.subtitle }}</h2>
<p>{{ post.body }}</p>
</div>
</div>
</div>
</body>
<footer>
<p>Made with ♥️ in London.</p>
</footer>
</html>
개발을 배우는 듯 하면서도