Flask 由一个三条款的 BSD 许可证许可。基本上可以认为：你可以用它做任何事情， 只要版权在 Flask 的支持范围内，条款不能被修改，并且提供免责声明。 此外，你不可以在没有书面同意的情况下使用作者的名字来推广衍生作品。
完整的许可证可以在下面找到（ Flask License ）。对于文档和艺术作品， 使用不同的许可证。
下面的章节包含完整的 Flask 及其文档的许可证文本。
Copyright (c) 2012 by Armin Ronacher and contributors. See AUTHORS for more details.
Some rights reserved.
Redistribution and use in source and binary forms of the software as well as documentation, with or without modification, are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
- The names of the contributors may not be used to endorse or promote products derived from this software without specific prior written permission.
THIS SOFTWARE AND DOCUMENTATION IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE AND DOCUMENTATION, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Flask Artwork License¶
Copyright (c) 2010 by Armin Ronacher.
Some rights reserved.
This logo or a modified version may be used by anyone to refer to the Flask project, but does not indicate endorsement by the project.
Redistribution and use in source (the SVG file) and binary forms (rendered PNG files etc.) of the image, with or without modification, are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright notice and this list of conditions.
- The names of the contributors to the Flask software (see AUTHORS) may not be used to endorse or promote products derived from this software without specific prior written permission.
Note: we would appreciate that you make the image a link to http://flask.pocoo.org/ if you use it on a web page.