pip install --user pipenv安装pipenv在用户目录下
py -m site --user-site通过此命令找到用户基础目录，结果为C:\Users\u14e\AppData\Roaming\Python\Python35\site-packages
将用户基础目录结尾的site-packages换成Scripts，即C:\Users\u14e\AppData\Roaming\Python\Python35\Scripts，然后将这一路径添加到系统变量中
重新打开命令行工具，如cmd，pipenv --version检查是否安装成功
pipenv install创建一个虚拟环境
pipenv shell激活虚拟环境，exit推出虚拟环境
pipenv install requests安装python包，pipenv install django==1.11.7安装制定版本的包，pipenv uninstall requests卸载包
pipenv graph查看安装的包，以及依赖的其他包

# 1 安装
pip install virtualenv
virtualenv --version
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# 非Windows
# pip install virtualenvwrapper
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# Windows
pip install virtualenvwrapper-win
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# 查看当前所有的虚拟环境
workon
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# 创建一个虚拟环境
mkvirtualenv new_env
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# 删除一个虚拟环境
rmvirtualenv new_env

# 在当前环境中将路径切到项目包打包txt文件目录下
- 项目依赖 pip3 install pipreqs
- 生成依赖文件：pipreqs ./ --encoding==‘utf-8‘
- 安装依赖文件：pip3 install -r requirements.txt 
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# app.py
from flask import Flask
def create_app():
    app = Flask(__name__)  # 指定位置信息
    app.config.from_object(‘app.config.setting‘)
    app.config.from_object(‘app.config.secure‘)
    register_blueprint(app)
    return app
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# genger.py---启动文件
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from app.app import create_app
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app = create_app()
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@app.route(‘/v1/user/get‘)
def get_user():
    return ‘i am andy‘
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@app.route(‘/v1/book/get‘)
def get_book():
    return ‘this is get book ‘
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if __name__ == ‘__main__‘:
    app.run(debug=True)

# 分别设置蓝图

# book.py
from flask import Blueprint
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book = Blueprint(‘book‘, __name__)
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@book.route(‘/v1/book/get‘)
def get_book():
    return ‘this is get book ‘
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# user.py
from flask import Blueprint
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user = Blueprint(‘user‘, __name__)
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@user.route(‘/v1/user/get‘)
def get_user():
    return ‘i am andy‘
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# app.py(生成app并注册蓝图)
from flask import Flask
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def register_blueprint(app):
    from app.api.v1.user import user
    from app.api.v1.book import book
    app.register_blueprint(user)
    app.register_blueprint(book)
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def create_app():
    app = Flask(__name__)  # 指定位置信息
    app.config.from_object(‘app.config.setting‘)
    app.config.from_object(‘app.config.secure‘)
    register_blueprint(app)
    return app
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# 启动文件
from app.app import create_app
app = create_app()
if __name__ == ‘__main__‘:
    app.run(debug=True)
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1 Blurpring蓝图不是用来拆分视图函数的，应该是用来模块级别的拆分
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2 写路由的时候太繁琐（重复劳动，比如我写v1/book/get,又要写一个接口是v1/book/delete）

#创建红图
class Redprint:
    def __init__(slef,name):
        self.name = name
        self.mound = []
        
    def route(self,rule,**options):
        def decorator(f):
            # f就是所装饰的方法试图，rule就是路由，options就是关键字参数，比如，methods=[‘get‘,‘post‘]
            self.mound.append((f,rule,options))
            return f
        return decorator
    
    def register(self, bp, url_prefix=None):
        if url_prefix is None:
            url_prefix = ‘/‘ + self.name
        for f, rule, options in self.mound:
            endpoint = options.pop("endpoint", f.__name__)
            bp.add_url_rule(url_prefix + rule, endpoint, f, **options)
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# book.py(使用红图)
from app.libs.redprint import Redprint
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api = Redprint(‘book‘)
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@api.route(‘/get‘)
def get_book():
    return ‘this is get book ‘
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# v1/__init__.py(创建蓝图对象，并在蓝图对象中注册红图)
from flask import Blueprint
from app.api.v1 import book, user
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def create_blueprint_v1():
    bp_v1 = Blueprint(‘v1‘, __name__)
    user.api.register(bp_v1)
    book.api.register(bp_v1)
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    return bp_v1
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# app.py(将蓝图注册到app对象中)
from flask import Flask
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def register_blueprint(app):
    from app.api.v1 import create_blueprint_v1
    app.register_blueprint(create_blueprint_v1(), url_prefix=‘/v1‘)  # 蓝图补充路由的前缀
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def create_app():
    app = Flask(__name__)  # 指定位置信息
    app.config.from_object(‘app.config.setting‘)
    app.config.from_object(‘app.config.secure‘)
    register_blueprint(app)
    return app
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