Develop Reference

Import darknet FileNotFoundError: Could not find module

I am getting this error when I run import darknet:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Users\darknet-master\build\darknet\x64\darknet.py", line 211, in <module>
lib = CDLL(winGPUdll, RTLD_GLOBAL)
File "C:\Users\AppData\Local\Programs\Python\Python39\lib\ctypes\__init__.py", line 374, in __init__
self._handle = _dlopen(self._name, mode)
FileNotFoundError: Could not find module 'C:\Users\darknet-master\build\darknet\x64\yolo_cpp_dll.dll' (or one of its dependencies). Try using the full path with constructor syntax.```

Instead of just downloading yet another version of python (yawn), we can fix darknet.py to import the DLLs correctly. As mentioned here, we need to add correct DLL import paths if using python > 3.8. The solution is to add these lines
os.add_dll_directory('c:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v11.1/bin')
os.add_dll_directory(os.path.dirname(__file__))
somewhere before the CDLL calls. You can place them at the top of the script.
The first line allows python to load DLLs from your CUDA install which you need if you're using GPU.
The second line allows python to load DLLs from the current working directory (into which you should copy yolo_cpp_dll.dll and pthreadVC2.dll). Alternatively you could replace this to the path that contains these DLLs.

lib = CDLL(winGPUdll, RTLD_GLOBAL, winmode=0)
Add the winmode=0 if python > 3.8

This is because Python 3.9 has some issue. It throws an error when the yolo_cpp_dll.dll file is imported.
Here's how to fix it:
Install Python 3.7 or lower (3.6 worked for me). You can either install version 3.7 along with your current version or remove the current one and install Python 3.7 only. If installed alongside current version then you'll have to rename the newly installed python (3.7) exe file to something like python3.7 in its installed location.
After renaming, add that directory to the PATH environment variable in Windows.
Go to your file location where darknet is stored, (for me it's C:\Users\ARYA\Documents\Penelitian1\coba1_darknet\darknet-master\build\darknet\x64\), open the Command Prompt and type python3.7 (rather than python only). This will open Python 3.7.
Here you can now run import darknet.

The answer above of #xiang zhang
worked for me by adding winmod=0 in the lines 214, 218 and 222.
if not os.path.exists(winGPUdll):
raise ValueError("NoDLL")
lib = CDLL(winGPUdll, RTLD_GLOBAL, winmode=0)
except (KeyError, ValueError):
hasGPU = False
if os.path.exists(winNoGPUdll):
lib = CDLL(winNoGPUdll, RTLD_GLOBAL, winmode=0)
print("Notice: CPU-only mode")
else:
# Try the other way, in case no_gpu was compile but not renamed
lib = CDLL(winGPUdll, RTLD_GLOBAL, winmode=0)

Python GUI2Exe Application Standalone Build (Using Py2Exe)

I am trying to build a Python Script into a stand alone application. I am using GUI2Exe. My script uses selenium package. I have it installed.
Project compiles fine and runs on python command line directly but fails to build a stand alone because it is referring to folder:
ERROR: test_file_data_extract (__main__.FileDataExtract)
----------------------------------------------------------------------
Traceback (most recent call last):
File "File_data_extract.py", line 18, in setUp
File "selenium\webdriver\firefox\firefox_profile.pyc", line 63, in __init__
IOError: [Errno 2] No such file or directory: 'C:\\users\\username\\PycharmProjects\\Python_27_32bit\\file_data_extract\\dist\\File_data_extract.exe\\selenium\\webdriver\\firefox\\webdriver_prefs.json'
It is looking for selenium package is located at :
C:\Users\username\Anaconda2_Py27_32bit\Lib\site-packages\selenium-2.48.0-py2.7.egg\selenium\webdriver\firefox
where C:\Users\username\Anaconda2_Py27_32bit is where I installed Anaconda Python 2.7, 32 bit version. By default it is looking for in \dist\filename.exe folder.

I was able to build it using bbfreeze. It works great.
First I had to install bbfreezee via pip (one time only):
pip install bbfreeze
Create a build_package.py file as:
from bbfreeze import Freezer
f = Freezer("project_name", includes=("selenium","SendKeys",)) #list problem packages here to manually include
f.addScript("project_name_script.py")
f() # starts the freezing process
Build project:
python build_package.py bdist_bbfreezee
in folder project_name where project_name_script.py sits you find project_name_script.exe with all the include packages including selenium and sendkeys. When you distribute the package you need to distribute entire project_name because it contains all dependent library dlls (python .pyd).
More details refer official bbfreezee here:
https://pypi.python.org/pypi/bbfreeze/#downloads

Where to put images folder in python exe?

I have converted a python game I designed into an exe. Running the exe itself causes it to flash and then close, meaning an error has occured. Running it from the Command Prompt causes the error as well, but documents it:
Cannot load image: Playfield.png
Couldn't open images\Playfield.png
This is telling me that the load_image block is failing. I have encountered this before when I did not have an images directory.
I attempted to move the images folder to the dist directory. This is the error that shows up:
Traceback (most recent call last):
File "Table_Wars.py", line 728, in <module>
File "Table_Wars.py", line 51, in main
File "Table_Wars.py", line 236, in __init__
File "pygame\__init__.pyc", line 70, in __getattr__
NotImplementedError: font module not available
(ImportError: DLL load failed: The specified module could not be found.)
This is my first time with py2exe, so I'm not really sure what is happening. The raw python file itself, Table_Wars.py, runs as expected.
If it helps, the location for the entire Table_Wars folder is inside a folder called Games, located on my Desktop (C:\Users\Oventoaster\Desktop\Games\Table_Wars). I am running Windows 7 32 bit OS.
On request, here is the output.txt I have generated:
Folder PATH listing for volume OS
Volume serial number is 7659-4C9C
C:\USERS\OVENTOASTER\DESKTOP\GAMES\TABLE_WARS
build
bdist.win32
winexe
bundle-2.7
collect-2.7
ctypes
distutils
email
mime
encodings
logging
multiprocessing
dummy
pygame
threads
unittest
xml
parsers
temp
dist
images
Here is the setup.py I used to convert the file:
from distutils.core import setup
import py2exe
setup(console=['Table_Wars.py'])
EDIT: I have attempted to use the full py2exe example. This will create the exe, but gives the same Cannot load image error. Attempting to put the images folder in the same folder as the exe creates a Runtime Error: The application requested the runtime to terminate it in an unusual way.
The shortened form of the code Slace Diamond suggested prevents py2exe from finding Table_Wars.py:
from cmd:
running py2exe
*** searching for required modules ***
error: Table_Wars.py: No such file or directory.
setup and Table_Wars are in the same directory. If it help, I input the full path to python.exe and setup.py.
EDIT: I seem to be getting closer. I put the images directory within self.extra_datas, and now I am getting this:
Fatal Python error: (segmentation fault)
This application has requested the runtime to terminate it in an unusual way. Please contact the application's suppourt team for more information

When you build a distributable package with py2exe (and py2app for that matter), part of the package environment is to point to a local resource location for files. In your plain unpackaged version, you are referring to a relative "images/" location. For the packaged version, you need to configure your setup.py to include the resources in its own location.
Refer to this doc for very specific info about how to set the data_files option of your package: http://www.py2exe.org/index.cgi/data_files
That page has multiple examples to show both very simple paths, and also a helper function for finding the data and building the data_files list for you.
Here is an example of the simple snippet:
from distutils.core import setup
import py2exe
Mydata_files = [('images', ['c:/path/to/image/image.png'])]
setup(
console=['trypyglet.py.py']
data_files = Mydata_files
options={
"py2exe":{
"unbuffered": True,
"optimize": 2,
"excludes": ["email"]
}
}
)
This closely matches what you are trying to achieve. It is saying that the "image.png" source file should be placed into the "images" directory at the root of the resources location inside the package. This resource root will be your current directory from your python scripts, so you can continue to refer to it as a relative sub directory.

It looks like you've already fixed the image problem by moving the folder into dist. The missing font module, on the other hand, is a known problem between pygame and py2exe. Py2exe doesn't copy some necessary DLLs, so you have to override py2exe's isSystemDLL method, forcing it to include audio and font related DLLs.
If Table_Wars.py is the only module in your project, try running this script with python setup.py py2exe:
from os.path import basename
from distutils.core import setup
import py2exe
origIsSystemDLL = py2exe.build_exe.isSystemDLL
def isSystemDLL(pathname):
if basename(pathname).lower() in ("libogg-0.dll", "sdl_ttf.dll"):
return 0
return origIsSystemDLL(pathname)
py2exe.build_exe.isSystemDLL = isSystemDLL
setup(windows=[{"script": "Table_Wars.py"}],
options={"py2exe": {"dist_dir": "dist"}})
You could also try the example py2exe setup file on the pygame wiki. If neither of them are working, please add the error messages to your question.
I tried running py2exe on a sample project, and it also breaks for me when I use the default pygame font. If you're using the default font, try putting a ttf file in the root of your project and also in the dist folder. You'll have to change the call to pygame.Font in your script as well:
font = pygame.font.Font("SomeFont.ttf", 28)

qooxdoo and debian lenny

Hy,
Trying to use qooxdoo with debian lenny.
qooxdoo sdk 1.2
create-application.py ok but I've got a problem with generate.py :
/demo/qooxdoo/hello1$ ./generate.py source-all
Traceback (most recent call last):
File "/demo/qooxdoo-1.2-sdk/tool/bin/generator.py", line 26, in <module>
from generator.Generator import Generator
File "/demo/qooxdoo-1.2-sdk/tool/bin/Generator.py", line 31, in <module>
#import warnings
File "/demo/qooxdoo-1.2-sdk/tool/bin/Generator.py", line 31, in <module>
#import warnings
ImportError: No module named code.Class
I do think I'm missing some debian packages
Do please help me. Ta.

This stack trace is a tad weird. For a basic thing, the referenced code line (Generator.py:31) imports from "generator.code.Class", and the ImportError indicates that it doesn't find the "code" subpackage under "generator". But the "#import warnings" line is actually generator.py line 31, as if it would be mixing generator.py and Generator.py.
This is furthered by the fact that the stack trace references /demo/qooxdoo-1.2-sdk/tool/bin/Generator.py, which should really be /demo/qooxdoo-1.2-sdk/tool/pylib/generator/Generator.py
I don't have a lenny handy to check if the package itself is alright, but I get the feeling there is some basic flaw with how the qooxdoo SDK is installed on your machine.
I recommend that you simply download the qooxdoo-1.2-sdk from sourceforge and unpack it to a suitable directory. Then re-run the create-application.py from this package to create a new skeleton, or edit the config.json of your existing skeleton so that the QOOXDOO_PATH macro points to the new SDK. Then you should be all set.

I agree with zamnut6. I've had the same problem when I extracted the qooxdoo SDK package on a a virtualbox shared HFS filesystem. The problem is something to do with file name casing incompatibility between two file systems.
Extracting the SDK on a normal Linux directory (if your development environment is Linux) should solve this issue.

I ran into this problem too when I had unpacked the zip file in a virtual box shared directory (host XP, guest Ubuntu), the share caused this issue when I ran ./generate.py source within the shared directory.
When I unpacked the zip to a normal Linux directory, I had no problems.

How can I make Python see sqlite?

I cannot use sqlite3 (build python package), for the reason that _sqlite3.so file is missing. I found that people had the same problem and they resolved it here. To solve my problem I have to "install sqlite3 and recompile Python". I also found out that the problem can be solved by "building from source and moving the library to /usr/lib/python2.5/lib-dynload/".
As I have been told to here, I have to install sqlite from the source and copy newly compiled files to my Python directory (nothing was said about "recompile Python"). Well, I have installed sqlite and now I have to copy something to my /lib-dynload/ directory.
I am not sure what exactly I should copy. In my /lib-dynload/ directory I have only .so files. And in my sqlite-3.6.18 I do not have any *.so files (it makes me suspicious). I had this problem since I did not have _sqlite3.so file in /lib-dynload/. By compilation of sqlite I got some new files (for example sqlite3.o and sqlite3.lo) but not _sqlite3.so.
P.S. Some details:
1. I use Python 2.6.2 (which I installed locally).
2. I do not have root permissions.
3. I had already sqlite installed globally on the machine by root.
4. I just installed sqlite locally.
5. My OS is CentOS release 5.3 (Final).
6. When I type in Python command line import sqlite3 I get:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/loctopu/opt/lib/python2.6/sqlite3/__init__.py", line 24, in <module>
from dbapi2 import *
File "/home/loctopu/opt/lib/python2.6/sqlite3/dbapi2.py", line 27, in <module>
from _sqlite3 import *
ImportError: No module named _sqlite3

I don't have exact answer, but few hints here
To install python from source, you don't need to be root, you can always install at /home/USERNAME/usr, for example when you do configure, do like ./configure --prefix=/home/USERNAME/usr
Installing sqlite binaries does not mean its included python extension (instead, sqlite dev files are needed when you compile python)
proper import usage of sqlite3 is import sqlite3