Python 烧瓶-无法加载配置文件

我在尝试加载自定义Flask开发对象时遇到问题

这是我的烧瓶应用程序结构

/home/sincorchetes/Projects/Flask/my_app

：

├── app.py
├── __init__.py
├── instance
│   └── config.cfg
├── __pycache__
│   ├── app.cpython-37.pyc
│   └── __init__.cpython-37.pyc
└── static
    ├── css
    ├── images
    └── js

我已经在app.py中设置了这个

from flask import Flask 
import os

app = Flask(__name__,instance_path=os.getcwd() + '/instance/') 
app.config.from_pyfile('config.cfg')
app.config.from_object('config.DevelopmentConfig')


@app.route('/') 
def hello_world(): 
    return 'Hello to the World of Flask!' 

if __name__ == '__main__': 
    app.run() 

我运行：

cd /home/sincorchetes/Projects/flask/my_app
export FLASK_APP=app.py
flask run

我得到：

 * Serving Flask app "app.py"
 * Environment: production
   WARNING: This is a development server. Do not use it in a production deployment.
   Use a production WSGI server instead.
 * Debug mode: off
Traceback (most recent call last):
  File "/home/sincorchetes/Projects/flask/bin/flask", line 8, in <module>
    sys.exit(main())
  File "/home/sincorchetes/Projects/flask/lib64/python3.7/site-packages/flask/cli.py", line 966, in main
    cli.main(prog_name="python -m flask" if as_module else None)
  File "/home/sincorchetes/Projects/flask/lib64/python3.7/site-packages/flask/cli.py", line 586, in main
    return super(FlaskGroup, self).main(*args, **kwargs)
  File "/home/sincorchetes/Projects/flask/lib64/python3.7/site-packages/click/core.py", line 717, in main
    rv = self.invoke(ctx)
  File "/home/sincorchetes/Projects/flask/lib64/python3.7/site-packages/click/core.py", line 1137, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/home/sincorchetes/Projects/flask/lib64/python3.7/site-packages/click/core.py", line 956, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/home/sincorchetes/Projects/flask/lib64/python3.7/site-packages/click/core.py", line 555, in invoke
    return callback(*args, **kwargs)
  File "/home/sincorchetes/Projects/flask/lib64/python3.7/site-packages/click/decorators.py", line 64, in new_func
    return ctx.invoke(f, obj, *args, **kwargs)
  File "/home/sincorchetes/Projects/flask/lib64/python3.7/site-packages/click/core.py", line 555, in invoke
    return callback(*args, **kwargs)
  File "/home/sincorchetes/Projects/flask/lib64/python3.7/site-packages/flask/cli.py", line 848, in run_command
    app = DispatchingApp(info.load_app, use_eager_loading=eager_loading)
  File "/home/sincorchetes/Projects/flask/lib64/python3.7/site-packages/flask/cli.py", line 305, in __init__
    self._load_unlocked()
  File "/home/sincorchetes/Projects/flask/lib64/python3.7/site-packages/flask/cli.py", line 330, in _load_unlocked
    self._app = rv = self.loader()
  File "/home/sincorchetes/Projects/flask/lib64/python3.7/site-packages/flask/cli.py", line 388, in load_app
    app = locate_app(self, import_name, name)
  File "/home/sincorchetes/Projects/flask/lib64/python3.7/site-packages/flask/cli.py", line 240, in locate_app
    __import__(module_name)
  File "/home/sincorchetes/Projects/flask/projectio/app.py", line 7, in <module>
    app.config.from_pyfile('config.cfg')
  File "/home/sincorchetes/Projects/flask/lib64/python3.7/site-packages/flask/config.py", line 131, in from_pyfile
    with open(filename, mode="rb") as config_file:
FileNotFoundError: [Errno 2] Unable to load configuration file (No such file or directory): '/home/sincorchetes/Projects/flask/my_app/config.cfg'

*服务烧瓶应用程序“app.py”
*环境：生产
警告：这是一个开发服务器。不要在生产部署中使用它。
改用生产WSGI服务器。
*调试模式：关闭
回溯（最近一次呼叫最后一次）：
文件“/home/sincorchetes/Projects/flask/bin/flask”，第8行，in
sys.exit（main（））
文件“/home/sincorchetes/Projects/flask/lib64/python3.7/site-packages/flask/cli.py”，第966行，主文件
cli.main（prog_name=“python-m flask”如果为as_模块，则为无）
文件“/home/sincorchetes/Projects/flask/lib64/python3.7/site packages/flask/cli.py”，第586行，主目录
返回超级（烧瓶组，自身）。主（*args，**kwargs）
文件“/home/sincorchetes/Projects/flask/lib64/python3.7/site packages/click/core.py”，第717行，在main中
rv=自调用（ctx）
文件“/home/sincorchetes/Projects/flask/lib64/python3.7/site packages/click/core.py”，调用中的第1137行
返回进程结果（sub_ctx.command.invoke（sub_ctx））
文件“/home/sincorchetes/Projects/flask/lib64/python3.7/site packages/click/core.py”，调用中的第956行
返回ctx.invoke（self.callback，**ctx.params）
文件“/home/sincorchetes/Projects/flask/lib64/python3.7/site packages/click/core.py”，调用中的第555行
返回回调（*args，**kwargs）
文件“/home/sincorchetes/Projects/flask/lib64/python3.7/site packages/click/decorators.py”，第64行，在新函数中
返回ctx.invoke（f，obj，*args，**kwargs）
文件“/home/sincorchetes/Projects/flask/lib64/python3.7/site packages/click/core.py”，调用中的第555行
返回回调（*args，**kwargs）
文件“/home/sincorchetes/Projects/flask/lib64/python3.7/site packages/flask/cli.py”，第848行，在run_命令中
app=DispatchingApp（info.load\u app，使用\u eager\u loading=eager\u loading）
文件“/home/sincorchetes/Projects/flask/lib64/python3.7/site packages/flask/cli.py”，第305行，在__
自身。_加载_解锁（）
文件“/home/sincorchetes/Projects/flask/lib64/python3.7/site packages/flask/cli.py”，第330行，在“加载”中
self.\u app=rv=self.loader（）
load_应用程序中的文件“/home/sincorchetes/Projects/flask/lib64/python3.7/site packages/flask/cli.py”，第388行
应用程序=定位应用程序（自我、导入名称、名称）
文件“/home/sincorchetes/Projects/flask/lib64/python3.7/site packages/flask/cli.py”，第240行，在locate_应用程序中
__导入（模块名称）
文件“/home/sincorchetes/Projects/flask/projecto/app.py”，第7行，在
app.config.from_pyfile（'config.cfg'））
文件“/home/sincorchetes/Projects/flask/lib64/python3.7/site packages/flask/config.py”，第131行，from_pyfile
打开（filename，mode=“rb”）作为配置文件：
FileNotFoundError:[Errno 2]无法加载配置文件（没有此类文件或目录）：“/home/sincorchetes/Projects/flask/my_app/config.cfg”

为什么它需要应用程序的“根”目录，并避免在文件头中设置

实例路径？

您可以使用：

app = Flask(__name__)

在不指定实例路径的情况下，会为您计算：

如果未提供instance_path参数，则使用以下默认位置：

• 已卸载的模块：

  /myapp.py
  /instance
  

• 已卸载的程序包：

  /myapp
      /__init__.py
  /instance
  

• 已安装的模块或包：

  $PREFIX/lib/python2.X/site-packages/myapp
  $PREFIX/var/myapp-instance
  

  $PREFIX是Python安装的前缀。这可以是/usr，也可以是指向virtualenv的路径。您可以打印sys.prefix的值以查看前缀设置为什么

---

来自：“请记住，提供此路径时必须是绝对路径。”。是的，

os.getcwd（）+'/instance/'

给出=

/home/sincorchetes/Projects/flask/my_app/instance

，如果我没有指定

实例路径

。我遇到了同样的错误：

[Errno 2]无法加载配置文件（没有这样的文件或目录）：/home/sincorchetes/Projects/flask/projecto/config.cfg'

这是Python shell--------------------------->

键入“帮助”、“版权”、“信用证”或“许可证”以获取更多信息。>>>导入系统>>>打印（系统前缀）/home/sincorchetes/Projects/flask