Python 防止代码在导入时运行

当CherryPy web应用程序启动时导入模块，而不是创建新的

进程时，如何获取一些代码来运行

我的CherryPy应用程序遵循以下模式：

Main.py

from Api1.Api1 import Api1
from Api2.Api2 import Api2
config = {'global': {'server.socket_host':  '0.0.0.0'}}
class Root():
    global config
    def __init__(self):
        self.app1 = App1('app1')
        self.app2 = App2('app2')
        config.update(self.app1.config)
        config.update(self.app2.config)

if __name__ == '__main__':
    cherrypy.quickstart(Root(), '/', config)

def every_hour():
    [...]
Monitor(cherrypy.engine, every_hour, frequency=60 * 60).start()
db = peewee.SqliteDatabase('app1.db', threadlocals=True)
class App1():
    def __init__(self, root_dir):
        self.root_dir = root_dir
        my_path = os.path.dirname(__file__)
        self.config = {'/%s/css' % root_dir: {'tools.staticdir.on': True, 'tools.staticdir.dir': '%s\\css' % my_path},
                       '/%s/img' % root_dir: {'tools.staticdir.on': True, 'tools.staticdir.dir': '%s\\img' % my_path}}

from App1.App1 import App1, app1_init
from App2.App2 import App2
config = {'global': {'server.socket_host':  '0.0.0.0'}}
class Root():
    global config
    def __init__(self):
        self.app1 = App1('app1')
        self.app2 = App2('app2')
        config.update(self.app1.config)
        config.update(self.app2.config)

if __name__ == '__main__':
    app1_init()
    cherrypy.quickstart(Root(), '/', config)

def every_hour():
    [...]

db = None
def app1_init():
    global db
    Monitor(cherrypy.engine, every_hour, frequency=60 * 60).start()
    db = peewee.SqliteDatabase('app1.db', threadlocals=True)

class App1():
    def __init__(self, root_dir):
        self.root_dir = root_dir
        my_path = os.path.dirname(__file__)
        self.config = {'/%s/css' % root_dir: {'tools.staticdir.on': True, 'tools.staticdir.dir': '%s\\css' % my_path},
                       '/%s/img' % root_dir: {'tools.staticdir.on': True, 'tools.staticdir.dir': '%s\\img' % my_path}}

这里的
if uuuuu name uuu='.\uuuuu main uuu'.
做它的工作：
uuu name uu='.\uuuu main uu='.\uuuu mp uu main
当服务器启动时，创建一个新的
进程时，所以
cherrypy.quickstart（）
只发生一次

App1\App1.py

from Api1.Api1 import Api1
from Api2.Api2 import Api2
config = {'global': {'server.socket_host':  '0.0.0.0'}}
class Root():
    global config
    def __init__(self):
        self.app1 = App1('app1')
        self.app2 = App2('app2')
        config.update(self.app1.config)
        config.update(self.app2.config)

if __name__ == '__main__':
    cherrypy.quickstart(Root(), '/', config)

def every_hour():
    [...]
Monitor(cherrypy.engine, every_hour, frequency=60 * 60).start()
db = peewee.SqliteDatabase('app1.db', threadlocals=True)
class App1():
    def __init__(self, root_dir):
        self.root_dir = root_dir
        my_path = os.path.dirname(__file__)
        self.config = {'/%s/css' % root_dir: {'tools.staticdir.on': True, 'tools.staticdir.dir': '%s\\css' % my_path},
                       '/%s/img' % root_dir: {'tools.staticdir.on': True, 'tools.staticdir.dir': '%s\\img' % my_path}}

from App1.App1 import App1, app1_init
from App2.App2 import App2
config = {'global': {'server.socket_host':  '0.0.0.0'}}
class Root():
    global config
    def __init__(self):
        self.app1 = App1('app1')
        self.app2 = App2('app2')
        config.update(self.app1.config)
        config.update(self.app2.config)

if __name__ == '__main__':
    app1_init()
    cherrypy.quickstart(Root(), '/', config)

def every_hour():
    [...]

db = None
def app1_init():
    global db
    Monitor(cherrypy.engine, every_hour, frequency=60 * 60).start()
    db = peewee.SqliteDatabase('app1.db', threadlocals=True)

class App1():
    def __init__(self, root_dir):
        self.root_dir = root_dir
        my_path = os.path.dirname(__file__)
        self.config = {'/%s/css' % root_dir: {'tools.staticdir.on': True, 'tools.staticdir.dir': '%s\\css' % my_path},
                       '/%s/img' % root_dir: {'tools.staticdir.on': True, 'tools.staticdir.dir': '%s\\img' % my_path}}

在这里，同样的技巧不起作用，因为它总是“App1.App1”
，所以在服务器启动和
进程（target=some\u func）时启动一个新的
监视器，并创建一个新的数据库连接。start（）
导入时将运行不在方法或类中的代码，因此，如果您有一个文件x.py，其中只显示：

print("I'm just a poor boy, I need no sympathy")

如果您有另一个类似您的文件导入此文件，您将看到此文本的打印，甚至在main或init启动之前

[编辑]读回我的答案可能有点笼统，但正因为如此，您的代码在类或函数之外：

Monitor(cherrypy.engine, every_hour, frequency=60 * 60).start()
db = peewee.SqliteDatabase('app1.db', threadlocals=True)

导入时也将运行。
一个选项是将App1.py顶层的初始化代码移动到一个函数，然后从
中调用该函数，如果
name\uuuuuu==“\uuuu main\uuuu”：
在
main.py
中进行保护：

Main.py

from Api1.Api1 import Api1
from Api2.Api2 import Api2
config = {'global': {'server.socket_host':  '0.0.0.0'}}
class Root():
    global config
    def __init__(self):
        self.app1 = App1('app1')
        self.app2 = App2('app2')
        config.update(self.app1.config)
        config.update(self.app2.config)

if __name__ == '__main__':
    cherrypy.quickstart(Root(), '/', config)

def every_hour():
    [...]
Monitor(cherrypy.engine, every_hour, frequency=60 * 60).start()
db = peewee.SqliteDatabase('app1.db', threadlocals=True)
class App1():
    def __init__(self, root_dir):
        self.root_dir = root_dir
        my_path = os.path.dirname(__file__)
        self.config = {'/%s/css' % root_dir: {'tools.staticdir.on': True, 'tools.staticdir.dir': '%s\\css' % my_path},
                       '/%s/img' % root_dir: {'tools.staticdir.on': True, 'tools.staticdir.dir': '%s\\img' % my_path}}

from App1.App1 import App1, app1_init
from App2.App2 import App2
config = {'global': {'server.socket_host':  '0.0.0.0'}}
class Root():
    global config
    def __init__(self):
        self.app1 = App1('app1')
        self.app2 = App2('app2')
        config.update(self.app1.config)
        config.update(self.app2.config)

if __name__ == '__main__':
    app1_init()
    cherrypy.quickstart(Root(), '/', config)

def every_hour():
    [...]

db = None
def app1_init():
    global db
    Monitor(cherrypy.engine, every_hour, frequency=60 * 60).start()
    db = peewee.SqliteDatabase('app1.db', threadlocals=True)

class App1():
    def __init__(self, root_dir):
        self.root_dir = root_dir
        my_path = os.path.dirname(__file__)
        self.config = {'/%s/css' % root_dir: {'tools.staticdir.on': True, 'tools.staticdir.dir': '%s\\css' % my_path},
                       '/%s/img' % root_dir: {'tools.staticdir.on': True, 'tools.staticdir.dir': '%s\\img' % my_path}}

App1.py

from Api1.Api1 import Api1
from Api2.Api2 import Api2
config = {'global': {'server.socket_host':  '0.0.0.0'}}
class Root():
    global config
    def __init__(self):
        self.app1 = App1('app1')
        self.app2 = App2('app2')
        config.update(self.app1.config)
        config.update(self.app2.config)

if __name__ == '__main__':
    cherrypy.quickstart(Root(), '/', config)

def every_hour():
    [...]
Monitor(cherrypy.engine, every_hour, frequency=60 * 60).start()
db = peewee.SqliteDatabase('app1.db', threadlocals=True)
class App1():
    def __init__(self, root_dir):
        self.root_dir = root_dir
        my_path = os.path.dirname(__file__)
        self.config = {'/%s/css' % root_dir: {'tools.staticdir.on': True, 'tools.staticdir.dir': '%s\\css' % my_path},
                       '/%s/img' % root_dir: {'tools.staticdir.on': True, 'tools.staticdir.dir': '%s\\img' % my_path}}

from App1.App1 import App1, app1_init
from App2.App2 import App2
config = {'global': {'server.socket_host':  '0.0.0.0'}}
class Root():
    global config
    def __init__(self):
        self.app1 = App1('app1')
        self.app2 = App2('app2')
        config.update(self.app1.config)
        config.update(self.app2.config)

if __name__ == '__main__':
    app1_init()
    cherrypy.quickstart(Root(), '/', config)

def every_hour():
    [...]

db = None
def app1_init():
    global db
    Monitor(cherrypy.engine, every_hour, frequency=60 * 60).start()
    db = peewee.SqliteDatabase('app1.db', threadlocals=True)

class App1():
    def __init__(self, root_dir):
        self.root_dir = root_dir
        my_path = os.path.dirname(__file__)
        self.config = {'/%s/css' % root_dir: {'tools.staticdir.on': True, 'tools.staticdir.dir': '%s\\css' % my_path},
                       '/%s/img' % root_dir: {'tools.staticdir.on': True, 'tools.staticdir.dir': '%s\\img' % my_path}}

这不是很理想，因为任何导入
App1
的东西都需要知道如何调用
App1\u init
，但它确实解决了这个问题。
我知道。。。因此我的问题是