我正在使用Flask，一个Python框架。 Flask使用Jinja来渲染模板。 我不知道Jinja Flask使用哪个版本，也不知道如何检索Jinja版本或Flask版本。我使用Python 2.7版。
模板在css / image目录中包含一个图像。当直接在Firefox浏览器中查看模板文件时，该图像是可见的。
但是当执行Flask时：
from flask import Flask，render_template app = Flask（__ name__） @ app.route（'/ hello /'） @ app.route（'/ hello /< name>） def hello（name = None）： return render_template（'Basic.html'，name = name） if __name__ =='__main__'： app.debug = True app.run（）HTML文件的内容：
<！DOCTYPE HTML> < html> < body> <！ - 变量示例begin - > {％if name name％} < h1> Hello {{name}}！< / h1> {％else％} < h1> Hello World！< / h1> {％endif％} <！ - 变量示例结束 - > < img src =css / images / icons / resultset_previous.pngwidth =16height =16alt =previoustitle =Previousborder =0> ; < / body> < / html>运行正常和变量示例的模板按预期方式运行。但图像不显示。 调试返回：GET /hello/css/images/icons/resultset_previous.png HTTP / 1.1404 -
如文档中所建议的VirtualEnv。 图片的路径似乎是未知的。如何设置路径？
解决方案对于Flask，您应该将静态文件保存在一个文件夹static使用url_for函数。让我们说你的项目被称为myproject，并使用你的例子，应该看起来像这样：
myproject / app.py 模板/ 静态/ css / 图片/ 图标/ resultset_previous.png然后在模板中，您可以调用
< img src = {{url_for（'static'，filename ='css / images / icons / resultset_previous.png'）}} width =16height =16alt =previoustitle =Previous BORDER = 0 >另外，为了回答你关于jinja版本等的问题，请检查一下
https：// github。 com / mitsuhiko / flask / blob / master / .travis-lowest-requirements.txt
Newbie question.
I am using Flask, a webframe for Python. Flask uses Jinja to render the template. I do not know which version of Jinja Flask uses, nor do I know how to retrieve the Jinja version or the Flask version. I use Python version 2.7.
The template contains an image in the css/image directory. This image is visible when viewing the template as a file directly in the Firefox browser.
But not when executing Flask :
from flask import Flask, render_template app = Flask(__name__) @app.route('/hello/') @app.route('/hello/<name>') def hello(name=None): return render_template('Basic.html', name=name) if __name__ == '__main__': app.debug = True app.run()The content of HTML file :
<!DOCTYPE HTML> <html> <body> <!-- variable example begin --> {% if name %} <h1>Hello {{ name }}!</h1> {% else %} <h1>Hello World!</h1> {% endif %} <!-- variable example end --> <img src="css/images/icons/resultset_previous.png" width="16" height="16" alt="previous" title="Previous" border="0"> </body> </html>The template run fine and variable example runs as expected. But the images is not displayed. Debug returns : "GET /hello/css/images/icons/resultset_previous.png HTTP/1.1" 404 -
I run Flask in VirtualEnv as suggested in the documentation. The path to the image seems to be unknown. How can I set the path?
解决方案For Flask, you should keep the static files usually under a folder "static" and then use the url_for function. Lets say your project is called "myproject" and using your example, it should look something like:
myproject/ app.py templates/ static/ css/ images/ icons/ resultset_previous.pngThen in the template, you can call
<img src= {{ url_for('static', filename = 'css/images/icons/resultset_previous.png') }} width="16" height="16" alt="previous" title="Previous" border="0">Also, to answer your question about jinja versions etc, check this out
github/mitsuhiko/flask/blob/master/.travis-lowest-requirements.txt
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