Cannot import my module into another module - python-3.x

Professional Python newbie here. I have created a Python module called aviation with a file in there called database.py.
I have another module called core, with a file in there called calculator.py.
I want to import aviation.database.py into my calculator.py.
The basic structure is as follows:
My project
aviation (module)
- database.py
core (module)
- calculator.py
test.py
My calculator.py file has an import such as:
from aviation import database as aviation_database
This module is not recognised and I get a red squiggly line indicating as much.
If I create another file test.py outside of aviation and core and add the above import, there are no issues in this tests.py file - the import works fine.
It appears that I need to do something so that my module can import from another module... it does allow me to import installed modules (like date), but I have no idea what I am missing.
I am using the IntelliJ IDE and my code is located in the regular C:\Users\\IdeaProjects directory.
Can someone tell me what I should do and why I am facing this problem?

Well I would recommend you to create __init__ file in the modules.
The python3 doc states that :
The __init__.py files are required to make Python treat the
directories as containing packages; this is done to prevent
directories with a common name, such as string, from unintentionally
hiding valid modules that occur later on the module search path. In
the simplest case, init.py can just be an empty file, but it can
also execute initialization code for the package or set the all
variable, described later.
So your Directory Structure becomes
My project
aviation (module)
- database.py
- __init__.py
core (module)
- calculator.py
- __init__.py
test.py
Now import all the thing in your __init__ file that you want to us from other packages. Like in aviation's __init__.py file write
import database
Similarly, for core's __init__.py
Now in calculator.py you can import them by -
from aviation import database
Let me know, if this help !
Thanks

Its as simple as this.
For instance, you have an already written code e.g myname.py and you want to import the entire module into new code e.g newwork.py
step 1. open your code newwork.py
step 2. just as you do other import, just write:
import myname
myname
Thats all.
Now, you have your entire nyname code inside newwork. When you run newwork, it runs nymame alongside.
I hope this help somebody?

Related

Importing modules from top-level to lower-level files (for the thousandth time) [duplicate]

I've been here:
http://www.python.org/dev/peps/pep-0328/
http://docs.python.org/2/tutorial/modules.html#packages
Python packages: relative imports
python relative import example code does not work
Relative imports in python 2.5
Relative imports in Python
Python: Disabling relative import
and plenty of URLs that I did not copy, some on SO, some on other sites, back when I thought I'd have the solution quickly.
The forever-recurring question is this: how do I solve this "Attempted relative import in non-package" message?
ImportError: attempted relative import with no known parent package
I built an exact replica of the package on pep-0328:
package/
__init__.py
subpackage1/
__init__.py
moduleX.py
moduleY.py
subpackage2/
__init__.py
moduleZ.py
moduleA.py
The imports were done from the console.
I did make functions named spam and eggs in their appropriate modules. Naturally, it didn't work. The answer is apparently in the 4th URL I listed, but it's all alumni to me. There was this response on one of the URLs I visited:
Relative imports use a module's name attribute to determine that module's position in the package hierarchy. If the module's name does not contain any package information (e.g. it is set to 'main') then relative imports are resolved as if the module were a top level module, regardless of where the module is actually located on the file system.
The above response looks promising, but it's all hieroglyphs to me. So my question, how do I make Python not return to me "Attempted relative import in non-package"? has an answer that involves -m, supposedly.
Can somebody please tell me why Python gives that error message, what it means by "non-package", why and how do you define a 'package', and the precise answer put in terms easy enough for a kindergartener to understand.
Script vs. Module
Here's an explanation. The short version is that there is a big difference between directly running a Python file, and importing that file from somewhere else. Just knowing what directory a file is in does not determine what package Python thinks it is in. That depends, additionally, on how you load the file into Python (by running or by importing).
There are two ways to load a Python file: as the top-level script, or as a
module. A file is loaded as the top-level script if you execute it directly, for instance by typing python myfile.py on the command line. It is loaded as a module when an import statement is encountered inside some other file. There can only be one top-level script at a time; the top-level script is the Python file you ran to start things off.
Naming
When a file is loaded, it is given a name (which is stored in its __name__ attribute).
If it was loaded as the top-level script, its name is __main__.
If it was loaded as a module, its name is [ the filename, preceded by the names of any packages/subpackages of which it is a part, separated by dots ], for example, package.subpackage1.moduleX.
But be aware, if you load moduleX as a module from shell command line using something like python -m package.subpackage1.moduleX, the __name__ will still be __main__.
So for instance in your example:
package/
__init__.py
subpackage1/
__init__.py
moduleX.py
moduleA.py
if you imported moduleX (note: imported, not directly executed), its name would be package.subpackage1.moduleX. If you imported moduleA, its name would be package.moduleA. However, if you directly run moduleX from the command line, its name will instead be __main__, and if you directly run moduleA from the command line, its name will be __main__. When a module is run as the top-level script, it loses its normal name and its name is instead __main__.
Accessing a module NOT through its containing package
There is an additional wrinkle: the module's name depends on whether it was imported "directly" from the directory it is in or imported via a package. This only makes a difference if you run Python in a directory, and try to import a file in that same directory (or a subdirectory of it). For instance, if you start the Python interpreter in the directory package/subpackage1 and then do import moduleX, the name of moduleX will just be moduleX, and not package.subpackage1.moduleX. This is because Python adds the current directory to its search path when the interpreter is entered interactively; if it finds the to-be-imported module in the current directory, it will not know that that directory is part of a package, and the package information will not become part of the module's name.
A special case is if you run the interpreter interactively (e.g., just type python and start entering Python code on the fly). In this case, the name of that interactive session is __main__.
Now here is the crucial thing for your error message: if a module's name has no dots, it is not considered to be part of a package. It doesn't matter where the file actually is on disk. All that matters is what its name is, and its name depends on how you loaded it.
Now look at the quote you included in your question:
Relative imports use a module's name attribute to determine that module's position in the package hierarchy. If the module's name does not contain any package information (e.g. it is set to 'main') then relative imports are resolved as if the module were a top-level module, regardless of where the module is actually located on the file system.
Relative imports...
Relative imports use the module's name to determine where it is in a package. When you use a relative import like from .. import foo, the dots indicate to step up some number of levels in the package hierarchy. For instance, if your current module's name is package.subpackage1.moduleX, then ..moduleA would mean package.moduleA. For a from .. import to work, the module's name must have at least as many dots as there are in the import statement.
... are only relative in a package
However, if your module's name is __main__, it is not considered to be in a package. Its name has no dots, and therefore you cannot use from .. import statements inside it. If you try to do so, you will get the "relative-import in non-package" error.
Scripts can't import relative
What you probably did is you tried to run moduleX or the like from the command line. When you did this, its name was set to __main__, which means that relative imports within it will fail, because its name does not reveal that it is in a package. Note that this will also happen if you run Python from the same directory where a module is, and then try to import that module, because, as described above, Python will find the module in the current directory "too early" without realizing it is part of a package.
Also remember that when you run the interactive interpreter, the "name" of that interactive session is always __main__. Thus you cannot do relative imports directly from an interactive session. Relative imports are only for use within module files.
Two solutions:
If you really do want to run moduleX directly, but you still want it to be considered part of a package, you can do python -m package.subpackage1.moduleX. The -m tells Python to load it as a module, not as the top-level script.
Or perhaps you don't actually want to run moduleX, you just want to run some other script, say myfile.py, that uses functions inside moduleX. If that is the case, put myfile.py somewhere else – not inside the package directory – and run it. If inside myfile.py you do things like from package.moduleA import spam, it will work fine.
Notes
For either of these solutions, the package directory (package in your example) must be accessible from the Python module search path (sys.path). If it is not, you will not be able to use anything in the package reliably at all.
Since Python 2.6, the module's "name" for package-resolution purposes is determined not just by its __name__ attributes but also by the __package__ attribute. That's why I'm avoiding using the explicit symbol __name__ to refer to the module's "name". Since Python 2.6 a module's "name" is effectively __package__ + '.' + __name__, or just __name__ if __package__ is None.)
This is really a problem within python. The origin of confusion is that people mistakenly takes the relative import as path relative which is not.
For example when you write in faa.py:
from .. import foo
This has a meaning only if faa.py was identified and loaded by python, during execution, as a part of a package. In that case,the module's name
for faa.py would be for example some_packagename.faa. If the file was loaded just because it is in the current directory, when python is run, then its name would not refer to any package and eventually relative import would fail.
A simple solution to refer modules in the current directory, is to use this:
if __package__ is None or __package__ == '':
# uses current directory visibility
import foo
else:
# uses current package visibility
from . import foo
There are too much too long anwers in a foreign language. So I'll try to make it short.
If you write from . import module, opposite to what you think, module will not be imported from current directory, but from the top level of your package! If you run .py file as a script, it simply doesn't know where the top level is and thus refuses to work.
If you start it like this py -m package.module from the directory above package, then python knows where the top level is. That's very similar to java: java -cp bin_directory package.class
So after carping about this along with many others, I came across a note posted by Dorian B in this article that solved the specific problem I was having where I would develop modules and classes for use with a web service, but I also want to be able to test them as I'm coding, using the debugger facilities in PyCharm. To run tests in a self-contained class, I would include the following at the end of my class file:
if __name__ == '__main__':
# run test code here...
but if I wanted to import other classes or modules in the same folder, I would then have to change all my import statements from relative notation to local references (i.e. remove the dot (.)) But after reading Dorian's suggestion, I tried his 'one-liner' and it worked! I can now test in PyCharm and leave my test code in place when I use the class in another class under test, or when I use it in my web service!
# import any site-lib modules first, then...
import sys
parent_module = sys.modules['.'.join(__name__.split('.')[:-1]) or '__main__']
if __name__ == '__main__' or parent_module.__name__ == '__main__':
from codex import Codex # these are in same folder as module under test!
from dblogger import DbLogger
else:
from .codex import Codex
from .dblogger import DbLogger
The if statement checks to see if we're running this module as main or if it's being used in another module that's being tested as main. Perhaps this is obvious, but I offer this note here in case anyone else frustrated by the relative import issues above can make use of it.
Here's a general recipe, modified to fit as an example, that I am using right now for dealing with Python libraries written as packages, that contain interdependent files, where I want to be able to test parts of them piecemeal. Let's call this lib.foo and say that it needs access to lib.fileA for functions f1 and f2, and lib.fileB for class Class3.
I have included a few print calls to help illustrate how this works. In practice you would want to remove them (and maybe also the from __future__ import print_function line).
This particular example is too simple to show when we really need to insert an entry into sys.path. (See Lars' answer for a case where we do need it, when we have two or more levels of package directories, and then we use os.path.dirname(os.path.dirname(__file__))—but it doesn't really hurt here either.) It's also safe enough to do this without the if _i in sys.path test. However, if each imported file inserts the same path—for instance, if both fileA and fileB want to import utilities from the package—this clutters up sys.path with the same path many times, so it's nice to have the if _i not in sys.path in the boilerplate.
from __future__ import print_function # only when showing how this works
if __package__:
print('Package named {!r}; __name__ is {!r}'.format(__package__, __name__))
from .fileA import f1, f2
from .fileB import Class3
else:
print('Not a package; __name__ is {!r}'.format(__name__))
# these next steps should be used only with care and if needed
# (remove the sys.path manipulation for simple cases!)
import os, sys
_i = os.path.dirname(os.path.abspath(__file__))
if _i not in sys.path:
print('inserting {!r} into sys.path'.format(_i))
sys.path.insert(0, _i)
else:
print('{!r} is already in sys.path'.format(_i))
del _i # clean up global name space
from fileA import f1, f2
from fileB import Class3
... all the code as usual ...
if __name__ == '__main__':
import doctest, sys
ret = doctest.testmod()
sys.exit(0 if ret.failed == 0 else 1)
The idea here is this (and note that these all function the same across python2.7 and python 3.x):
If run as import lib or from lib import foo as a regular package import from ordinary code, __package is lib and __name__ is lib.foo. We take the first code path, importing from .fileA, etc.
If run as python lib/foo.py, __package__ will be None and __name__ will be __main__.
We take the second code path. The lib directory will already be in sys.path so there is no need to add it. We import from fileA, etc.
If run within the lib directory as python foo.py, the behavior is the same as for case 2.
If run within the lib directory as python -m foo, the behavior is similar to cases 2 and 3. However, the path to the lib directory is not in sys.path, so we add it before importing. The same applies if we run Python and then import foo.
(Since . is in sys.path, we don't really need to add the absolute version of the path here. This is where a deeper package nesting structure, where we want to do from ..otherlib.fileC import ..., makes a difference. If you're not doing this, you can omit all the sys.path manipulation entirely.)
Notes
There is still a quirk. If you run this whole thing from outside:
$ python2 lib.foo
or:
$ python3 lib.foo
the behavior depends on the contents of lib/__init__.py. If that exists and is empty, all is well:
Package named 'lib'; __name__ is '__main__'
But if lib/__init__.py itself imports routine so that it can export routine.name directly as lib.name, you get:
$ python2 lib.foo
Package named 'lib'; __name__ is 'lib.foo'
Package named 'lib'; __name__ is '__main__'
That is, the module gets imported twice, once via the package and then again as __main__ so that it runs your main code. Python 3.6 and later warn about this:
$ python3 lib.routine
Package named 'lib'; __name__ is 'lib.foo'
[...]/runpy.py:125: RuntimeWarning: 'lib.foo' found in sys.modules
after import of package 'lib', but prior to execution of 'lib.foo';
this may result in unpredictable behaviour
warn(RuntimeWarning(msg))
Package named 'lib'; __name__ is '__main__'
The warning is new, but the warned-about behavior is not. It is part of what some call the double import trap. (For additional details see issue 27487.) Nick Coghlan says:
This next trap exists in all current versions of Python, including 3.3, and can be summed up in the following general guideline: "Never add a package directory, or any directory inside a package, directly to the Python path".
Note that while we violate that rule here, we do it only when the file being loaded is not being loaded as part of a package, and our modification is specifically designed to allow us to access other files in that package. (And, as I noted, we probably shouldn't do this at all for single level packages.) If we wanted to be extra-clean, we might rewrite this as, e.g.:
import os, sys
_i = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
if _i not in sys.path:
sys.path.insert(0, _i)
else:
_i = None
from sub.fileA import f1, f2
from sub.fileB import Class3
if _i:
sys.path.remove(_i)
del _i
That is, we modify sys.path long enough to achieve our imports, then put it back the way it was (deleting one copy of _i if and only if we added one copy of _i).
Here is one solution that I would not recommend, but might be useful in some situations where modules were simply not generated:
import os
import sys
parent_dir_name = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
sys.path.append(parent_dir_name + "/your_dir")
import your_script
your_script.a_function()
#BrenBarn's answer says it all, but if you're like me it might take a while to understand. Here's my case and how #BrenBarn's answer applies to it, perhaps it will help you.
The case
package/
__init__.py
subpackage1/
__init__.py
moduleX.py
moduleA.py
Using our familiar example, and add to it that moduleX.py has a relative import to ..moduleA. Given that I tried writing a test script in the subpackage1 directory that imported moduleX, but then got the dreaded error described by the OP.
Solution
Move test script to the same level as package and import package.subpackage1.moduleX
Explanation
As explained, relative imports are made relative to the current name. When my test script imports moduleX from the same directory, then module name inside moduleX is moduleX. When it encounters a relative import the interpreter can't back up the package hierarchy because it's already at the top
When I import moduleX from above, then name inside moduleX is package.subpackage1.moduleX and the relative import can be found
Following up on what Lars has suggested I've wrapped this approach in an experimental, new import library: ultraimport
It gives the programmer more control over imports and it allows file system based imports. Therefore, you can do relative imports from scripts. Parent package not necessary. ultraimports will always work, no matter how you run your code or what is your current working directory because ultraimport makes imports unambiguous. You don't need to change sys.path and also you don't need a try/except block to sometimes do relative imports and sometimes absolute.
You would then write in somefile.py something like:
import ultraimport
foo = ultraimport('__dir__/foo.py')
__dir__ is the directory of somefile.py, the caller of ultraimport(). foo.py would live in the same directory as somefile.py.
One caveat when importing scripts like this is if they contain further relative imports. ultraimport has a builtin preprocessor to rewrite subsequent relative imports to ultraimports so they continue to work. Though, this is currently somewhat limited as original Python imports are ambiguous and there's only so much you can do about it.
I had a similar problem where I didn't want to change the Python module search
path and needed to load a module relatively from a script (in spite of "scripts can't import relative with all" as BrenBarn explained nicely above).
So I used the following hack. Unfortunately, it relies on the imp module that
became deprecated since version 3.4 to be dropped in favour of importlib.
(Is this possible with importlib, too? I don't know.) Still, the hack works for now.
Example for accessing members of moduleX in subpackage1 from a script residing in the subpackage2 folder:
#!/usr/bin/env python3
import inspect
import imp
import os
def get_script_dir(follow_symlinks=True):
"""
Return directory of code defining this very function.
Should work from a module as well as from a script.
"""
script_path = inspect.getabsfile(get_script_dir)
if follow_symlinks:
script_path = os.path.realpath(script_path)
return os.path.dirname(script_path)
# loading the module (hack, relying on deprecated imp-module)
PARENT_PATH = os.path.dirname(get_script_dir())
(x_file, x_path, x_desc) = imp.find_module('moduleX', [PARENT_PATH+'/'+'subpackage1'])
module_x = imp.load_module('subpackage1.moduleX', x_file, x_path, x_desc)
# importing a function and a value
function = module_x.my_function
VALUE = module_x.MY_CONST
A cleaner approach seems to be to modify the sys.path used for loading modules as mentioned by Federico.
#!/usr/bin/env python3
if __name__ == '__main__' and __package__ is None:
from os import sys, path
# __file__ should be defined in this case
PARENT_DIR = path.dirname(path.dirname(path.abspath(__file__)))
sys.path.append(PARENT_DIR)
from subpackage1.moduleX import *
__name__ changes depending on whether the code in question is run in the global namespace or as part of an imported module.
If the code is not running in the global space, __name__ will be the name of the module. If it is running in global namespace -- for example, if you type it into a console, or run the module as a script using python.exe yourscriptnamehere.py then __name__ becomes "__main__".
You'll see a lot of python code with if __name__ == '__main__' is used to test whether the code is being run from the global namespace – that allows you to have a module that doubles as a script.
Did you try to do these imports from the console?
Relative imports use a module's name attribute to determine that module's position in the package hierarchy. If the module's name does not contain any package information (e.g. it is set to 'main') then relative imports are resolved as if the module were a top level module, regardless of where the module is actually located on the file system.
Wrote a little python package to PyPi that might help viewers of this question. The package acts as workaround if one wishes to be able to run python files containing imports containing upper level packages from within a package / project without being directly in the importing file's directory. https://pypi.org/project/import-anywhere/
In most cases when I see the ValueError: attempted relative import beyond top-level package and pull my hair out, the solution is as follows:
You need to step one level higher in the file hierarchy!
#dir/package/module1/foo.py
#dir/package/module2/bar.py
from ..module1 import foo
Importing bar.py when interpreter is started in dir/package/ will result in error despite the import process never going beyond your current directory.
Importing bar.py when interpreter is started in dir/ will succeed.
Similarly for unit tests:
python3 -m unittest discover --start-directory=. successfully works from dir/, but not from dir/package/.

How to import python git repos as packages

I am having trouble with importing python modules from two git repos as the code was not designed as a package, and there are name collisions which disabled me from being able to use sys.path.append in a straight-forward (albeit hacky?) manner.
Note that the problem is not particular of git-repos however I have encountered this problem only in this scenario because of trying to interface with existing work.
The folder structure looks like following:
project
- repo1
- foo.py
- bar.py
- run.py
- repo2
- foo.py
- bar.py
- run.py
test.py
Both foo.py import bar.py with import bar statements, which works fine as long as you are running the run.py scripts in the repo, however if I try to import repo1.foo and repo2.foo I run into multiple issues.
On attempting the following code
# test.py
import repo1.foo
import repo2.foo
I get the error ModuleNotFoundError: No module named 'bar', this makes some sense as nothing in the path makes either bar.py accessible.
However if I try to append paths 'repo1' and 'repo2' then I can only import either repo1.bar or repo2.bar depending on order of appends, which is not an acceptable solution.
As the repositories are not my code I would prefer to not change them, but instead wrap them into a namespaced package if possible, however I am unable to find any solutions for the problem.
TL;DR
Update:: As I was depending on this work extensively I published it as a Python package available here: https://pypi.org/project/packagify/ . You can install it instead of copying the old gist.
Add the class from this gist: https://gist.github.com/rijulg/3ea372bef35adb68e27080c949c942af in your code and you can use it as following
from packagify import Packagify
package = Packagify("/home/workspace/my_package")
object = package.import_module("module", ["object"])
object1, object2 = package.import_module("module", ["object1", "object2"])
Methods Tried
Installing the directory as a module using setuptools, this did not work as on loading the module various parts inside it threw ModuleNotFoundError as they were trying to access siblings without namespaces.
Various importlib functions, there are a few that allow loading python modules from .py files directly. This might have worked if the modules I wanted to import were contained within a file, but then perhaps there would be other solutions as well. As the problem stood I wasn't able to use this method as the module upon loading wasn't able to locate it's siblings.
Adding sys.path as mentioned in the question, but I also tried appending the path, loading module and then removing the path before loading the other module. This also did not work because presumably the modules were loaded into python cache and subsequent loads from different directory were ignored because of name clashes.
Finally, I noticed something weird happening when I changed the import level using the __import__ function and I tried the following snippet which worked fine on my toy example. However this still had various issues that I encountered while trying to load the actual repos I wanted to work with. As the solution appeared to be going in the right direction I made the class linked in the gist mentioned a the beginning of the post.
import builtins
original_import = __import__
def my_import(name, globals, locals, fromlist, level):
print("my_import", name, globals['__package__'], level)
try:
return original_import(name, globals, locals, fromlist, level)
except:
level = level + 1 if globals['__package__'] is not None else level
return original_import(name, globals, locals, fromlist, level)
builtins.__import__ = my_import
from repo1.foo import main as main_a
from repo2.foo import main as main_b
main_a()
main_b()

No module named xxxx. How to import relative path?

I have created a simplified version as to focus solely on getting the relative path to work. This is my file structure:
|
-project
|-package1
| |--page
| |-__init__
|
|-package2
|-test
|-__init__
I am trying to import page into test. However, I get the error that package1 is not a module. Below I have typed all that are in my code. Very simple. I am just trying to import page into test. Is there anything I am missing (file or page set up) that is preventing me from importing?
page.py
one='half'
two='ling'
tests.py
import os
import sys
three = (one+two)
print(three)
Have you tried "from package1 import page" into your test.py? Or "from package1.page import page"?
UPDATE
When import something, Python Interpreter search in the following places:
Built-ins
Current Directory
$PYTHONPATH, environment variable
some other directory related to the installation
The last three make up to be sys.path.
In your case, to import package1 into some script in package2, there's 2 ways:
Add project path into PYTHONPATH.
Dynamically append project path into sys.path
I guess you would appreciate the latter solution, just add
import sys
sys.path.append('..')
in front of everything and it will work.
Plus: It's kind of inconvenient to use the module not inside the current directory though. I've seen only a few actual python project, and What I've seen is some of them use a single main.py in the project root to run the whole project, including test-cases. Maybe this structure is more recommended.
Hope it helps~
Original Answer:
This dir structure works fine on my computer with:
import package.page as page
page.foo() # a function in page
Could I have a guess: your current working directory may be not under your project directory.
To check, test about this:
import os
print(os.getcwd())
If the output is not your current directory, that's my case. I used to mess with this before.
To avoid this, you can:
cd to your directory before running Python
run os.chdir(...) in your code, which is to change your working directory.
If not this case, please provide more information.

ModuleNotFoundError: cannot import local file

I have a module with multiple files structured like this:
/bettermod/
├── __init__.py
├── api.py
├── bettermod.py
├── errors.py
└── loggers.py
From bettermod.py, I'm trying to import two things:
a class called API from api.py
the whole errors.py file
For the first thing, it is quite easy, I just have to do this:
from .api import API
However, for importing the whole errors.py file, I'm encountering a problem; I'm trying to do like this:
from . import errors
which should work, according to this python documentation, but it's raising the following error:
File "/path/to/bettermod/bettermod.py", line 10, in <module>
from . import errors
ModuleNotFoundError: No module named 'bettermod'
Edit: when debugging, I found that __name__ was equal to bettermod.bettermod
From docs:
Note that relative imports are based on the name of the current module.
I cannot tell you what is wrong with certainty, but there is a smell: bettermod package has a bettermod module. You want to do from bettermod.bettermod import MyBetterClass? I doubt it. In Python files ARE namespaces, so choosing your file and directory names is also an API design. Just keep that in mind.
I suspect the problem is masked by the name collision. Try this. If you run python in bettermod directory and say import bettermod you are importing bettermod\bettermod.py. And . is relative to the bettermod.py module. Now try to run python in directory above bettermod package directory. It will work because now . resolves to bettermod package.
Try:
import mymodule
mymodule.__file__
This will tell what mymodule is. For packages, it will show path to __init__.py. This will help you to orient yourself. Also look up PYHTONPATH and how you can use it to make sure you are importing from the right path.

AttributeError when packaging python library

I'm in the process of learning how to package a python library using the official guide. I've started cloning the minimal sample package suggested in the guide here. I've then added the file my_module.py inside the folder sampleproject storing a simple power function. Another function is also stored in /sampleproject/sampleproject/__init__.py. The resulting structure of the library is the following
Finally, I've used pip to successfully install the package in the interpreter. The only thing left is to make sure that I'm able to run the functions stored in the subfolder sampleproject.
import sampleproject
sampleproject.main()
# Output
"Call your main application code here"
This is great. The package is able to run the function in __init__.py. However, the package is not able to find module.py:
import sampleproject
sampleproject.module
# Output
AttributeError: module 'sampleproject' has no attribute 'module'
I've tried to add __init__.py in the main folder and to change the settings in entry_points in setup.py without success. What should I let sampleproject to be able to find the function in module.py?
Your sampleproject.module is a function you would like to execute?
In this case, do as for the sampleproject, add () to execute it:
sampleproject.module()
Otherwise, you can import your package like this:
import sampleproject.module
or:
from sampleproject import module
To be clearer, you would have to import module in your sampleproject __init__.py. Then, when you want to use the package, import it (is some py file at root):
import sampleproject # is enough as it's going to import everything you stated in __init__.py
After that, you can start to use what's in the package you imported with maybe module() if you have a function called module in your package.
init.py discussions
it seems,
you are in sampleproject->module.py
so you need to try,
from sampleproject import module

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