This is my package hierarchy
app |--__init__.py //Empty file |--server.py |--global_vars.py | |--handlers |--__init__.py //Empty file | |--url1 | |--__init__.py //Empty file | |--app1.py | |--app2.py | |--url2 |--__init__.py //Empty file |--app3.py
Now I want to import global_vars.py
inside app1.py
. So I gave import app.global_vars.py
inside app1.py.
But I get the following error:
import app.global_vars ImportError: No module named app.global_vars
I should also mention that I am importing app1.py from server.py. server.py
is the file I am actually running. When server.py imports app1.py, app1.py
tries to import global_vars.py
and I get the above mentioned error
What am I doing wrong here?
If you are running app/server.py
as a script, the parent directory of app
is not added to sys.path()
. The app
directory itself is added instead (not as a package but as a import search path).
You have 3 options:
- Move
server.py
out of the app
package (next to it) Add a new script file next to app
that only runs:
from app import server server.main()
Add the parent directory of server.py
to sys.path
:
import os.path import sys parent = os.path.dirname(os.path.dirname(os.path.abspath(__file__))) sys.path.insert(0, parent)
This last option can introduce more problems however; now both the app
package and the modules contained in the app
package are on sys.path
. You can import both app.server
and server
and Python will see these as two separate modules, each with their own entry in sys.modules
, with separate copies of their globals.
need __init__.py
file, will regard it as a package
app
|--server.py
|--global_vars.py
|--handlers
|--__init__.py
...
__init__.py
can be empty