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"""Entry point from spinning up flask"""
import os
from typing import Dict
from typing import Union
from flask import Flask
def create_app(config: Union[Dict, str, None] = None) -> Flask:
"""Create a new flask object"""
app = Flask(__name__)
# Load default configuration
app.config.from_object("gn3.settings")
# Load environment configuration
if "GN3_CONF" in os.environ:
app.config.from_envvar('GN3_CONF')
# Load app specified configuration
if config is not None:
if isinstance(config, dict):
app.config.update(config)
elif config.endswith(".py"):
app.config.from_pyfile(config)
return app
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