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Why is my script's directory not in the Python sys.path?

Python 3.6.5
I am aware of this one: Why does my python not add current working directory to the path?
But the problem there is that he's doing something more complicated (referring to a sub-folder but executing from a main folder). The answers there are to either simplify things or to add package definitions.
And the selected answer even says: "It is the script's directory that is added"
However, my problem is really more simple: My script's directory ISN'T added.
Basically, all the tutorials on the internet say: import mymodule
When I do that, I get a name error...
My folder structure:
C:/Projects/interner
interner.py # this is the main program body
aux.py # this is the auxiliary file I would like to import into the above
I've tried both coding 'import aux' inside interner.py, and also using the interactive console:
cd c:/Projects/interner
python
import aux
To no avail (ModuleNotFoundError: No module named 'aux')
My sys.path:
['C:\\Tools\\Python\\python365\\python36.zip', 'C:\\Tools\\Python\\python365']
(both from inside the script and from interactive console)
Could you please tell me why I can't import local scripts? Is it because my sys.path is missing the PWD? If so, why is it missing it?
Edit: Doing this to help investigation:
>>> import os; print(os.listdir("."))
['aux.py', 'hw.py', 'interner.py', 'my_funcs.py']

I believe this is a Python bug, specific to the embeddable (ZIP file without an installer) Windows distribution. I’ve filed https://bugs.python.org/issue34841.
Removing the python37._pth file (presumably python36._pth in your case) from the distribution fixed it for me.

I don't know why but it seems that "" is missing from your sys.path variable, and that prevents from importing modules from current directory all right!
I can somehow reproduce your issue (eatcpu.py is in my current dir):
$ python.exe
Python 2.7.8 (default, Jun 30 2014, 16:08:48) [MSC v.1500 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path
['', 'C:\\Windows\\system32\\python27.zip', 'D:\\AppX64\\Python27\\DLLs', ... etc...]
>>> import eatcpu
works. Now in another python session:
$ python.exe
Python 2.7.8 (default, Jun 30 2014, 16:08:48) [MSC v.1500 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path.remove("")
>>> import eatcpu
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named eatcpu
>>>
So the quickfix for you is to do:
import sys
sys.path.append("")

It looks like you are using the embeddable distribution of CPython rather than one of the regular installers. As described on the documentation page:
The embedded distribution is a ZIP file containing a minimal Python environment. It is intended for acting as part of another application, rather than being directly accessed by end-users.
Since you seem to be directly accessing Python rather than embedding it, you should consider using the regular (or Microsoft Store) installer (also described on the page I linked above).

Try making it explicit:
from . import aux

iPython: DLL load failed: The specified module could not be found; plain Python fine

I keep getting this (well known) error in iPython. Yet, the same import works fine in plain Python. (Python 3.3.5, see details below)
iPython:
Python 3.3.5 (v3.3.5:62cf4e77f785, Mar 9 2014, 10:37:12) [MSC v.1600 32 bit (Intel)]
Type "copyright", "credits" or "license" for more information.
IPython 2.0.0 -- An enhanced Interactive Python.
? -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help -> Python's own help system.
object? -> Details about 'object', use 'object??' for extra details.
In [1]: import test1
---------------------------------------------------------------------------
ImportError Traceback (most recent call last)
<ipython-input-7-ddb30f03c287> in <module>()
----> 1 import test1
ImportError: DLL load failed: The specified module could not be found.
Python (not only it loads fine, it also works):
$ python
Python 3.3.5 (v3.3.5:62cf4e77f785, Mar 9 2014, 10:37:12) [MSC v.1600 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import test1
>>>
Now, Dependency Walker on test1.pyd shows this
[ ? ] LIBGCC_S_DW2-1.DLL Error opening file. The system cannot find the file specified (2).
[ ? ] LIBSTDC++-6.DLL Error opening file. The system cannot find the file specified (2).
[ ? ] PYTHON33.DLL Error opening file. The system cannot find the file spec
I even overwrote sys.path in iPython with the one from plain Python. The file test1.pyd is in C:\Test.
['c:\\Test',
'c:\\WinPython-32bit-3.3.5.0\\python-3.3.5\\python33.zip',
'c:\\WinPython-32bit-3.3.5.0\\python-3.3.5\\DLLs',
'c:\\WinPython-32bit-3.3.5.0\\python-3.3.5\\lib',
'c:\\WinPython-32bit-3.3.5.0\\python-3.3.5',
'c:\\WinPython-32bit-3.3.5.0\\python-3.3.5\\lib\\site-packages',
'c:\\WinPython-32bit-3.3.5.0\\python-3.3.5\\lib\\site-packages\\FontTools',
'c:\\WinPython-32bit-3.3.5.0\\python-3.3.5\\lib\\site-packages\\win32',
'c:\\WinPython-32bit-3.3.5.0\\python-3.3.5\\lib\\site-packages\\win32\\lib',
'c:\\WinPython-32bit-3.3.5.0\\python-3.3.5\\lib\\site-packages\\Pythonwin']
Why would the import work in plain Python but not in iPython?

I have encountered the same problem. After hours looking and thinking I found out the cause. The difference is environment variables between interpreters (plain python and ipython or pycharm etc.). I think your can use %env in ipython to check the environment variables. In plain python, use (works in python 3.7):
import os
os.environ
Then if there are differences, maybe you should set the right one before your run.
Actually there are multiple ways to set envs. For example
os.environ['key']='value' #Both key and value are strings
or
os.putenv('key', 'value')
Here key is the name of the environment variable, and value is the value you want to set it to.
Hope this helps you.~~~///(^v^)\\~~~

Pycharm 4 no module named ROOT, when importing a locally installed module (PyROOT), that is working fine from shell on Mac OS X Yosemite

I am trying to set up PyROOT to work with Pycharm 4 on Mac OS X Yosemite.
I have installed ROOT (locally), with the python option enabled, and set up all of the necessary environment paths.
echo $PYTHONPATH
/Users/natalia/Software/root/lib:/Users/natalia/Software/root/bin:/Users/natalia/Software/root
It works just fine from the shell interpreter:
python
Python 2.7.6 (default, Sep 9 2014, 15:04:36)
[GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.39)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import ROOT
>>> ROOT.__file__
'/Users/natalia/Software/root/lib/ROOT.pyc'
>>>
In Pycharm I have tried to add these paths to the interpreter using Preferences->Project Interpreter->More->Show paths...
The paths that show there are the following:
file:///Library/Python/2.7/site-packages/pip-6.1.1-py2.7.egg
file:///Users/natalia/Software/root/lib
file:///System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7
file:///System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin
file:///System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac
file:///System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages
file:///System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python
file:///System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk
file:///System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload
file:///System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/PyObjC
file:///Library/Python/2.7/site-packages
file:///Users/natalia/Software/root/bin
file:///Users/natalia/Software/root
I created the following file in Pycharm:
import os
os.system("echo $PYTHONPATH")
import ROOT
When run, it returns this:
Traceback (most recent call last):
/Users/natalia/Software:/Users/natalia/Software/root:/Users/natalia/Work/Projects/untitled
File "/Users/natalia/Work/Projects/untitled/l.py", line 3, in <module>
import ROOT
ImportError: No module named ROOT
Notice how this PYTHONPATH that's printed from python in Pycharm doesn't include (for a reason unknown to me) the path that actually includes the ROOT.pyc file, that is: '/Users/natalia/Software/root/lib'
I have also tried doing the dirty trick of
os.system("export PYTHONPATH=$PYTHONPATH:/Users/natalia/Software/root/lib")
but I found it doesn't actually change the path if I print it afterwards.
I am absolutely confused as to where Pycharm gets the paths from.
Any possible solutions would be welcome and greatly appreciated.

You may have figured this out already, but just in case...
import sys
sys.path.append('/Applications/Misc/root/lib')
import ROOT
print ROOT.TTimeStamp().AsString()
will add that search path to Python (& PyCharm by extension); the snippet gives me the following output in PyCharm:
/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7
/Users/rrios/PycharmProjects/untitled/dummy.py
Thu, 02 Jul 2015 01:07:57 UTC +628998000 nsec
Process finished with exit code 0

python import cx_Oracle error on cygwin

I tried to install cx_Oracle from pypi source since there is no available port for it in cygwin. I did make some changes as suggested in http://permalink.gmane.org/gmane.comp.python.db.cx-oracle/2492 and modified my setup.py. However, I still get the following error :-
$ python
Python 2.7.3 (default, Dec 18 2012, 13:50:09)
[GCC 4.5.3] on cygwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import cx_Oracle
/usr/lib/python2.7/site-packages/cx_Oracle-5.1.3-py2.7-cygwin-1.7.24-i686.egg/cx_Oracle.py:3: UserWa
rning: Module cx_Oracle was already imported from /usr/lib/python2.7/site-packages/cx_Oracle-5.1.3-p
y2.7-cygwin-1.7.24-i686.egg/cx_Oracle.pyc, but /home/zerog/cx_Oracle-5.1.3 is being added to sys.pat
h
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "build/bdist.cygwin-1.7.24-i686/egg/cx_Oracle.py", line 7, in <module>
File "build/bdist.cygwin-1.7.24-i686/egg/cx_Oracle.py", line 6, in __bootstrap__
ImportError: Exec format error
>>>
If someone can please help me fix this ?
TIA.

Fixed this by specifying the path to instantclient as below :
$ export PATH=$PATH:/cygdrive/d/Tools/instantclient_11_2
(Other, possibly important stuff) :
$ echo $LD_LIBRARY_PATH
/cygdrive/d/Tools/instantclient_11_2
$ echo $ORACLE_HOME
/cygdrive/d/Tools/instantclient_11_2
Now, I get :-
$ python
Python 2.7.3 (default, Dec 18 2012, 13:50:09)
[GCC 4.5.3] on cygwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import cx_Oracle
>>>

It's hard to pin down from the error message alone, but I am guessing that you have two different copies of cx_Oracle in your sys.path. The error message is complaining that a different version of the same module had already been import-ed.
Presumably the pristine upstream version is installed system-wide in /usr/lib/python2.7/site-packages/cx_Oracle-5.1.3-py2.7-cygwin-1.7.24-i686.egg, and your modified version in /home/zerog/cx_Oracle-5.1.3.
Does it work if you pare down sys.path so that only the original, or only your modified version, is included?
(You might want to use virtualenv if you need to switch back and forth between two versions frequently.)

I ran into this error "Exec format error."
For me, this was likely caused by a mismatch between cygwin being installed as 64 bit, but the instant client being installed as 32 bit. Double check that everything (oracle, cygwin) is either 32 bit or 64 bit.
What fixed my issue:
Since my cygwin is 64 bit (see uname -a, and look for x86_64), I downloaded the 64 bit instant client from oracle's website, and unzipped
I set the env vars in .profile, to point where it was unzipped:
export ORACLE_HOME=/cygdrive/c/oracle/instantclient_x64_11_2
export LD_LIBRARY_PATH=$ORACLE_HOME
export DYLD_LIBRARY_PATH=$ORACLE_HOME
export TNS_ADMIN='//optional/path/to/your/oracle/tns/files/'
source ~/.profile
To test, you should now be able to run this python command with no error:
import cx_Oracle
To verify the path is correct, if you run ls, you should see something like
ls $ORACLE_HOME
adrci.exe genezi.exe oci.sym ociw32.dll ojdbc6.jar
oraocci11.dll oraociei11.sym uidrvci.exe vc9
adrci.sym genezi.sym ocijdbc11.dll ociw32.sym orannzsbb11.dll
oraocci11.sym orasql11.dll uidrvci.sym xstreams.jar
BASIC_README oci.dll ocijdbc11.sym ojdbc5.jar orannzsbb11.sym
oraociei11.dll orasql11.sym vc8

import Tkinter fails with python 2.7.3 Mac OSX 10.8.2

I have read extensively on this problem, but not found a usable solution. Many of them suggest rebuilding python from scratch. That's a hurdle I'd like to avoid, if possible. So I am going to give this question one last, desperate shot. It shouldn't be a duplicate of the many similar questions on stackoverflow because I believe it to be specific to my installation, even though the symptoms are similar to others.
Here is the current state of my installation. I've installed lots of other packages like numpy and matplotlib without problems, but this one is stumping me.
MacBookPro:lib-tk rebcabin$ arch -x86_64 /opt/local/bin/python
Python 2.7.3 (default, Nov 17 2012, 19:54:34)
[GCC 4.2.1 Compatible Apple Clang 4.1 ((tags/Apple/clang-421.11.66))] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path
['', ...
'/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk',
...]
Notice lib-tk on the path. Let's go look at lib-tk:
MacBookPro:lib-tk rebcabin$ ls -la
total 3704
...
-rw-r--r-- 1 root wheel 155634 Nov 17 19:55 Tkinter.py
-rw-r--r-- 1 root wheel 224887 Nov 17 19:55 Tkinter.pyc
-rw-r--r-- 1 root wheel 224887 Nov 17 19:55 Tkinter.pyo
...
Let's try to import it
>>> import Tkinter
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "Tkinter.py", line 39, in <module>
import _tkinter # If this fails your Python may not be configured for Tk
ImportError: No module named _tkinter
Most of the reading I've done on this topic comes from just pasting the error above into Google. Some of the suggestions are quite glib and useless: "just reconfigure your python in setup.py, type 'make' and your problem is solved." Which setup.py? There are dozens in my python directories. Which makefile? Ditto. Maybe the context is that of building python from scratch, which, again, I will avoid because I don't want to risk breaking all the other packages that work.

Based on the path, It seems like you probably installed python via macports. If that's the case, look for something like py-tkinter -- e.g.
sudo port install py27-tkinter