We Keep Coding

I collect chromium for VM, TypeError: the JSON object must be str, not 'bytes'

after this command: $ autoninja -C out/Default chrome
deduces this error, how to fix? Help me please
[2549/55054] ACTION //gpu/config:process_json(//build/toolchain/linux:clang_x64)
FAILED: gen/gpu/config/gpu_driver_bug_list_arrays_and_structs_autogen.h gen/gpu/config/gpu_driver_bug_list_autogen.cc gen/gpu/config/gpu_driver_bug_list_autogen.h gen/gpu/config/gpu_driver_bug_list_exceptions_autogen.h gen/gpu/config/software_rendering_list_arrays_and_structs_autogen.h gen/gpu/config/software_rendering_list_autogen.cc gen/gpu/config/software_rendering_list_autogen.h gen/gpu/config/software_rendering_list_exceptions_autogen.h
python3 ../../gpu/config/process_json.py --output-dir gen/gpu/config --skip-testing-data --os-filter linux
Traceback (most recent call last):
File "../../gpu/config/process_json.py", line 1061, in <module>
sys.exit(main(sys.argv[1:]))
File "../../gpu/config/process_json.py", line 1036, in main
script_dir, options.output_dir, options.os_filter)
File "../../gpu/config/process_json.py", line 925, in process_software_rendering_list
'Software')
File "../../gpu/config/process_json.py", line 832, in process_json_file
json_data = json.load(json_file)
File "/usr/lib/python3.5/json/__init__.py", line 268, in load
parse_constant=parse_constant, object_pairs_hook=object_pairs_hook, **kw)
File "/usr/lib/python3.5/json/__init__.py", line 312, in loads
s.__class__.__name__))
TypeError: the JSON object must be str, not 'bytes'
[2552/55054] CXX obj/skia/skia_core_and_effects/SkReadBuffer.o
ninja: build stopped: subcommand failed.
Help me

After digging into the problem, I found that the problem is in the Python version. I was using 3.5.2, which is the latest version for Ubuntu 16.04 LTS. But it is not sufficient for building recent versions of Chromium as it seems to require at least 3.7 or above (this comment is not based on any official docs, it is just my guess.)
First check your python3 version with python3 --version. If it is the case, upgrade your Linux distro and run build/install-build-deps.sh.
Alternatively, update python3 only with the following commands:
sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt install python3.9
sudo ln -sf /usr/bin/python3.9 /usr/bin/python3

Mac OS 11.4 Big Sur - fixing python cryptography package in /System/Library/Frameworks/Python.framework/Versions/2.7

I bought a MacBook Pro 13 M1 (16 GB RAM, 1 TB SSD) and I'm trying to get it setup for work and part of that is using python 2 (yes I know it's end of life, I still need to use it till we finish porting to go). I have some python packages I'd like to remove from my system python2 (I'm sure I must've run sudo pip install on these at some point, which I know was stupid, but what is done is done) and now that I'm on Big Sur I can't remove these packages. I tried disabling SIP until I can get them removed (csrutil disable from recovery), but now I'm getting errors that I can't remove files from a read only filesystem
sudo pip uninstall cryptography   2  14:34
DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. pip 21.0 will drop support for Python 2.7 in January 2021. More details about Python 2 support in pip can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support pip 21.0 will remove support for this functionality.
WARNING: The directory '/Users/darren/Library/Caches/pip' or its parent directory is not owned or is not writable by the current user. The cache has been disabled. Check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Found existing installation: cryptography 3.3.2
Uninstalling cryptography-3.3.2:
Would remove:
/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/cryptography
/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/cryptography-3.3.2-py2.7.egg-info
Proceed (y/n)? y
ERROR: Exception:
Traceback (most recent call last):
File "/Users/darren/Library/Python/2.7/lib/python/site-packages/pip/_internal/cli/base_command.py", line 223, in _main
status = self.run(options, args)
File "/Users/darren/Library/Python/2.7/lib/python/site-packages/pip/_internal/commands/uninstall.py", line 90, in run
auto_confirm=options.yes, verbose=self.verbosity > 0,
File "/Users/darren/Library/Python/2.7/lib/python/site-packages/pip/_internal/req/req_install.py", line 686, in uninstall
uninstalled_pathset.remove(auto_confirm, verbose)
File "/Users/darren/Library/Python/2.7/lib/python/site-packages/pip/_internal/req/req_uninstall.py", line 403, in remove
moved.stash(path)
File "/Users/darren/Library/Python/2.7/lib/python/site-packages/pip/_internal/req/req_uninstall.py", line 292, in stash
renames(path, new_path)
File "/Users/darren/Library/Python/2.7/lib/python/site-packages/pip/_internal/utils/misc.py", line 355, in renames
shutil.move(old, new)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 323, in move
rmtree(src)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 270, in rmtree
rmtree(fullname, ignore_errors, onerror)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 275, in rmtree
onerror(os.remove, fullname, sys.exc_info())
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 273, in rmtree
os.remove(fullname)
OSError: [Errno 30] Read-only file system: '/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/cryptography/hazmat/_der.py'
but I can't remount root as read/write and get this error when I try:
sudo mount -uw /
mount_apfs: volume could not be mounted: Permission denied
mount: / failed with 66
How do I remove these files from /System/Library if it's read only? Do I have to format my system and start from scratch now that mac os put these files in a read only filesystem or is there a way to remove them?
Edit:
So I have broken packages in /System/Library that are preventing fabric from running so I can't get our stuff up and running. The main one being the cryptography package. So I either need to fix these packages so fabric can run or remove them or something.
The other part that makes this such a pain is that I'm trying to run python 2 on an M1 Mac which means either using the built in python or using rosetta with an x86 python2 as I have found no method for installing arm python 2 on an M1 Mac (there isn't an installer from python.org or brew since python2 was end of life when the M1 Macs shipped).
Edit2:
Maybe these packages that I'm having issues with did ship with Mac OS as the package's folder's created timestamp is "Jan 1 01:00:00 2020" just like every other file & folder in that same folder. If so I guess I need to fix them somehow. When I try to run fab from the command line I get this error in the cryptography package:
fab
/Users/darren/Library/Python/2.7/lib/python/site-packages/paramiko/transport.py:33: CryptographyDeprecationWarning: Python 2 is no longer supported by the Python core team. Support for it is now deprecated in cryptography, and will be removed in the next release.
from cryptography.hazmat.backends import default_backend
Traceback (most recent call last):
File "/Users/darren/Library/Python/2.7/bin/fab", line 5, in <module>
from fabric.main import program
File "/Users/darren/Library/Python/2.7/lib/python/site-packages/fabric/__init__.py", line 3, in <module>
from .connection import Config, Connection
File "/Users/darren/Library/Python/2.7/lib/python/site-packages/fabric/connection.py", line 16, in <module>
from paramiko.agent import AgentRequestHandler
File "/Users/darren/Library/Python/2.7/lib/python/site-packages/paramiko/__init__.py", line 22, in <module>
from paramiko.transport import SecurityOptions, Transport
File "/Users/darren/Library/Python/2.7/lib/python/site-packages/paramiko/transport.py", line 129, in <module>
class Transport(threading.Thread, ClosingContextManager):
File "/Users/darren/Library/Python/2.7/lib/python/site-packages/paramiko/transport.py", line 190, in Transport
if KexCurve25519.is_available():
File "/Users/darren/Library/Python/2.7/lib/python/site-packages/paramiko/kex_curve25519.py", line 30, in is_available
X25519PrivateKey.generate()
File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/cryptography/hazmat/primitives/asymmetric/x25519.py", line 39, in generate
from cryptography.hazmat.backends.openssl.backend import backend
File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/cryptography/hazmat/backends/openssl/__init__.py", line 7, in <module>
from cryptography.hazmat.backends.openssl.backend import backend
File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/cryptography/hazmat/backends/openssl/backend.py", line 117, in <module>
from cryptography.hazmat.bindings.openssl import binding
File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/cryptography/hazmat/bindings/openssl/binding.py", line 14, in <module>
from cryptography.hazmat.bindings._openssl import ffi, lib
ImportError: dlopen(/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/cryptography/hazmat/bindings/_openssl.so, 2): Symbol not found: _DTLS_client_method
Referenced from: /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/cryptography/hazmat/bindings/_openssl.so
Expected in: flat namespace
Error in atexit._run_exitfuncs:
Traceback (most recent call last):
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/atexit.py", line 24, in _run_exitfuncs
func(*targs, **kargs)
File "/Users/darren/Library/Python/2.7/lib/python/site-packages/paramiko/transport.py", line 120, in _join_lingering_threads
for thr in _active_threads:
TypeError: 'NoneType' object is not iterable
Error in sys.exitfunc:
Traceback (most recent call last):
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/atexit.py", line 24, in _run_exitfuncs
func(*targs, **kargs)
File "/Users/darren/Library/Python/2.7/lib/python/site-packages/paramiko/transport.py", line 120, in _join_lingering_threads
for thr in _active_threads:
TypeError: 'NoneType' object is not iterable
Has anyone else had this problem or have a fix for it?

I was able to install python2 for Apple Silicon/M1 from nix and then I had to manually install pip which let me install cryptography & cffi (I had libffi installed from brew). Here are the steps I used, I'm not sure if they're all necessary, but it's what I did:
Install Nix
see https://nixos.org/manual/nix/stable/#sect-macos-installation for more details, but if you have a mac with a T2 chip or M1 this will still be encrypted
sh <(curl -L https://nixos.org/nix/install) --darwin-use-unencrypted-nix-store-volume --daemon
Install python2 from nix
nix-env -i python-2.7.18
verify that you're using this python in a new terminal session (you'll need to start a new shell to get the updated path)
run which python
if it doesn't return something like /Users/user/.nix-profile/bin/python you'll want to add ~/.nix-profile/bin to the front of your path, start a new shell, and run which python again
Install pip
See https://pip.pypa.io/en/stable/installing/#installing-with-get-pip-py for more details, but if you curl the get-pip.py in this url and run it with python 2 it'll tell you to instead download and use the get-pip.py from https://bootstrap.pypa.io/pip/2.7/get-pip.py
curl https://bootstrap.pypa.io/pip/2.7/get-pip.py -o get-pip.py
python ./get-pip.py
Use brew to install libiff and openssl#1.1
I had done this step previously and I'm not 100% sure it's necessary, but I believe it is
brew install libiff openssl#1.1
Add the following to your .bashrc, .zshrc, .profile, or wherever you set your environment variables:
export LDFLAGS="-L$(brew --prefix openssl#1.1)/lib"
export CFLAGS="-I$(brew --prefix openssl#1.1)/include"
use pip to install cryptography
pip install cryptography
After this I had a functional python with cryptography installed and I was then able to install fabric (via pip install fabric==1.14.1 since 1.14.1 is the version I need for this old project, use what you need)
Edit:
Thanks to #CharlesDuffy for all of his help and as he correctly mentions in the comments bellow, you could (and probably should) install all of the dependencies and cryptography from nix instead of using a combination of brew and nix. I had brew and the dependancies installed before I had Nix installed so I haven't tested it out, but it should work.

Mac Mountain Lion / Macports / Python27: Installed, activated but ImportError

I installed Macports and Python27. Actived it, but it does not work? Any clue what went wrong?
I even deleted anything like brew and a previous port installation and rebooted before I installed a fresh copy again.
Thanks in advance.
M
macbook-pro-15:~ MR$ sudo port select --list python
Available versions for python:
none
python25-apple
python26-apple
python27 (active)
python27-apple
macbook-pro-15:~ MR$ python
Traceback (most recent call last):
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site.py", line 548, in <module>
main()
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site.py", line 530, in main
known_paths = addusersitepackages(known_paths)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site.py", line 266, in addusersitepackages
user_site = getusersitepackages()
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site.py", line 241, in getusersitepackages
user_base = getuserbase() # this will also set USER_BASE
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site.py", line 231, in getuserbase
USER_BASE = get_config_var('userbase')
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/sysconfig.py", line 516, in get_config_var
return get_config_vars().get(name)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/sysconfig.py", line 449, in get_config_vars
import re
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/re.py", line 105, in <module>
import sre_compile
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/sre_compile.py", line 14, in <module>
import sre_parse
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/sre_parse.py", line 17, in <module>
from sre_constants import *
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/sre_constants.py", line 18, in <module>
from _sre import MAXREPEAT
ImportError: cannot import name MAXREPEAT

The problem is due to bash cashing the path to previously launched commands.
The short fix is:
$ hash -d python
$ python
The longer story: for efficiency, bash caches the path to previously launched
commands. After installing Python through macports, if your system python has already been cached by bash, calling python will still call the system python (despite which python outputting the macports python version)
# Before installing macports
$ python -c 'print "Hello World!"'
Hello World!
$ which python
/usr/bin/python
# Install python27 via macports
sudo port install python27
sudo port select --set python python27
# The shell will still invoke the system python, despite the output of `which`
$ which python # macports
/opt/local/bin/python
$ hash -t python # system
/usr/bin/python
$ python # the shell invokes the executable from the cache, and this gives the error
# clear the cache
$ hash -d python
# now python should work
python

I was having the same problem. What finally worked for me was simply to uninstall and reinstall python through MacPorts.
> sudo port uninstall python27
> sudo port install python27
> sudo port select --set python python27
This installed Python 2.7.5 (default, Aug 1 2013, 01:01:17).
After uninstalling and reinstalling, make sure to log out of your shell and open new shells. Old shells will still see the same problem.

Django 1.5.1 python 3.3.1 on Windows 7 [duplicate]

I tried to run the following command, in the folder of my Django project:
$ python manage.py dbshell
It shows me this error:
$python manage.py dbshell
Traceback (most recent call last):
File "manage.py", line 11, in <module>
execute_manager(settings)
File "C:\Python25\lib\site-packages\django\core\management\__init__.py", line
362, in execute_manager
utility.execute()
File "C:\Python25\lib\site-packages\django\core\management\__init__.py", line
303, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "C:\Python25\lib\site-packages\django\core\management\base.py", line 195,
in run_from_argv
self.execute(*args, **options.__dict__)
File "C:\Python25\lib\site-packages\django\core\management\base.py", line 222,
in execute
output = self.handle(*args, **options)
File "C:\Python25\lib\site-packages\django\core\management\base.py", line 351,
in handle
return self.handle_noargs(**options)
File "C:\Python25\lib\site-packages\django\core\management\commands\dbshell.py
", line 9, in handle_noargs
from django.db import connection
File "C:\Python25\lib\site-packages\django\db\__init__.py", line 41, in <modul
e>
backend = load_backend(settings.DATABASE_ENGINE)
File "C:\Python25\lib\site-packages\django\db\__init__.py", line 17, in load_b
ackend
return import_module('.base', 'django.db.backends.%s' % backend_name)
File "C:\Python25\Lib\site-packages\django\utils\importlib.py", line 35, in im
port_module
__import__(name)
File "C:\Python25\lib\site-packages\django\db\backends\mysql\base.py", line 13
, in <module>
raise ImproperlyConfigured("Error loading MySQLdb module: %s" % e)
django.core.exceptions.ImproperlyConfigured: Error loading MySQLdb module: No mo
dule named MySQLdb
First question is, why does Python not simply include this MySQLdb module?
OK, just fine, try to search to solve this message.
I have looked around stackoverflow.com for installing this module but did not have a good result.
Download this module at: http://sourceforge.net/projects/mysql-python/
Comes to the installation of this module on my Windows Vista system.
After the extraction of the package, I run the cmd prompt to continue with the installation:
$ python setup.py install
Again it showed me one other message:
D:\SOFTWARE\PROGRAMMING\MySQL-python-1.2.3c1>python setup.py install
Traceback (most recent call last):
File "setup.py", line 5, in <module>
from setuptools import setup, Extension
ImportError: No module named setuptools
Playing around with this error message, I know that there is the ez_setup.py within the package:
$python ez_setup.py
It seems that everything is OK:
D:\SOFTWARE\PROGRAMMING\MySQL-python-1.2.3c1>python ez_setup.py
Downloading http://pypi.python.org/packages/2.5/s/setuptools/setuptools-0.6c9-py
2.5.egg
Processing setuptools-0.6c9-py2.5.egg
Copying setuptools-0.6c9-py2.5.egg to c:\python25\lib\site-packages
Adding setuptools 0.6c9 to easy-install.pth file
Installing easy_install-script.py script to C:\Python25\Scripts
Installing easy_install.exe script to C:\Python25\Scripts
Installing easy_install-2.5-script.py script to C:\Python25\Scripts
Installing easy_install-2.5.exe script to C:\Python25\Scripts
Installed c:\python25\lib\site-packages\setuptools-0.6c9-py2.5.egg
Processing dependencies for setuptools==0.6c9
Finished processing dependencies for setuptools==0.6c9
Now comes back to the setup.py to install again:
$python setup.py install
It again gave me one other error message:
D:\SOFTWARE\PROGRAMMING\MySQL-python-1.2.3c1>python setup.py install
running install
running bdist_egg
....
copying MySQLdb\constants\CLIENT.py -> build\lib.win32-2.5\MySQLdb\constants
running build_ext
error: Python was built with Visual Studio 2003;
extensions must be built with a compiler than can generate compatible binaries.
Visual Studio 2003 was not found on this system. If you have Cygwin installed,
you can try compiling with MingW32, by passing "-c mingw32" to setup.py.
How can I fix this problem?

Did you try looking here: http://sourceforge.net/projects/mysql-python/files/
That is the download area of MySQLdb project, it has nothing to do with django, so your question is incorrect - django does not make switching database backends hard, you just change one line. And of course, your python installation should support that database first, so by downloading binary package for Windows from the link I gave above (chose correct version to match your version of python) you can avoid all the hassle of compiling the source release.
Most probably you need either MySQL-python-1.2.2.win32-py2.5.exe or MySQL-python-1.2.2.win32-py2.4.exe

Uh, this isn't Django, this is you downloading some unspecified Python environment and expecting it to magically do everything exactly the way you wanted it to. Find a good tutorial on this and follow the instructions.
BTW, this is a very helpful forum, but giving no specifics and then delivering a non-question with an attitude is not a good way to get people to feel helpful.

I once had the same problem running Python and MySQL on the same computer. Like the guys/gals said above, Python does not come with built-in support for MySQL, so you will need to download the connectors.
The link given above by #kibitzer will most likely not work on Windows successfully, so go here to download a copy of the connector that works with windows. It comes with installer and no need to run setup.py script manually.

Python with MySQL on Windows: installation errors

I tried to run the following command, in the folder of my Django project:
$ python manage.py dbshell
It shows me this error:
$python manage.py dbshell
Traceback (most recent call last):
File "manage.py", line 11, in <module>
execute_manager(settings)
File "C:\Python25\lib\site-packages\django\core\management\__init__.py", line
362, in execute_manager
utility.execute()
File "C:\Python25\lib\site-packages\django\core\management\__init__.py", line
303, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "C:\Python25\lib\site-packages\django\core\management\base.py", line 195,
in run_from_argv
self.execute(*args, **options.__dict__)
File "C:\Python25\lib\site-packages\django\core\management\base.py", line 222,
in execute
output = self.handle(*args, **options)
File "C:\Python25\lib\site-packages\django\core\management\base.py", line 351,
in handle
return self.handle_noargs(**options)
File "C:\Python25\lib\site-packages\django\core\management\commands\dbshell.py
", line 9, in handle_noargs
from django.db import connection
File "C:\Python25\lib\site-packages\django\db\__init__.py", line 41, in <modul
e>
backend = load_backend(settings.DATABASE_ENGINE)
File "C:\Python25\lib\site-packages\django\db\__init__.py", line 17, in load_b
ackend
return import_module('.base', 'django.db.backends.%s' % backend_name)
File "C:\Python25\Lib\site-packages\django\utils\importlib.py", line 35, in im
port_module
__import__(name)
File "C:\Python25\lib\site-packages\django\db\backends\mysql\base.py", line 13
, in <module>
raise ImproperlyConfigured("Error loading MySQLdb module: %s" % e)
django.core.exceptions.ImproperlyConfigured: Error loading MySQLdb module: No mo
dule named MySQLdb
First question is, why does Python not simply include this MySQLdb module?
OK, just fine, try to search to solve this message.
I have looked around stackoverflow.com for installing this module but did not have a good result.
Download this module at: http://sourceforge.net/projects/mysql-python/
Comes to the installation of this module on my Windows Vista system.
After the extraction of the package, I run the cmd prompt to continue with the installation:
$ python setup.py install
Again it showed me one other message:
D:\SOFTWARE\PROGRAMMING\MySQL-python-1.2.3c1>python setup.py install
Traceback (most recent call last):
File "setup.py", line 5, in <module>
from setuptools import setup, Extension
ImportError: No module named setuptools
Playing around with this error message, I know that there is the ez_setup.py within the package:
$python ez_setup.py
It seems that everything is OK:
D:\SOFTWARE\PROGRAMMING\MySQL-python-1.2.3c1>python ez_setup.py
Downloading http://pypi.python.org/packages/2.5/s/setuptools/setuptools-0.6c9-py
2.5.egg
Processing setuptools-0.6c9-py2.5.egg
Copying setuptools-0.6c9-py2.5.egg to c:\python25\lib\site-packages
Adding setuptools 0.6c9 to easy-install.pth file
Installing easy_install-script.py script to C:\Python25\Scripts
Installing easy_install.exe script to C:\Python25\Scripts
Installing easy_install-2.5-script.py script to C:\Python25\Scripts
Installing easy_install-2.5.exe script to C:\Python25\Scripts
Installed c:\python25\lib\site-packages\setuptools-0.6c9-py2.5.egg
Processing dependencies for setuptools==0.6c9
Finished processing dependencies for setuptools==0.6c9
Now comes back to the setup.py to install again:
$python setup.py install
It again gave me one other error message:
D:\SOFTWARE\PROGRAMMING\MySQL-python-1.2.3c1>python setup.py install
running install
running bdist_egg
....
copying MySQLdb\constants\CLIENT.py -> build\lib.win32-2.5\MySQLdb\constants
running build_ext
error: Python was built with Visual Studio 2003;
extensions must be built with a compiler than can generate compatible binaries.
Visual Studio 2003 was not found on this system. If you have Cygwin installed,
you can try compiling with MingW32, by passing "-c mingw32" to setup.py.
How can I fix this problem?

Did you try looking here: http://sourceforge.net/projects/mysql-python/files/
That is the download area of MySQLdb project, it has nothing to do with django, so your question is incorrect - django does not make switching database backends hard, you just change one line. And of course, your python installation should support that database first, so by downloading binary package for Windows from the link I gave above (chose correct version to match your version of python) you can avoid all the hassle of compiling the source release.
Most probably you need either MySQL-python-1.2.2.win32-py2.5.exe or MySQL-python-1.2.2.win32-py2.4.exe

Uh, this isn't Django, this is you downloading some unspecified Python environment and expecting it to magically do everything exactly the way you wanted it to. Find a good tutorial on this and follow the instructions.
BTW, this is a very helpful forum, but giving no specifics and then delivering a non-question with an attitude is not a good way to get people to feel helpful.

I once had the same problem running Python and MySQL on the same computer. Like the guys/gals said above, Python does not come with built-in support for MySQL, so you will need to download the connectors.
The link given above by #kibitzer will most likely not work on Windows successfully, so go here to download a copy of the connector that works with windows. It comes with installer and no need to run setup.py script manually.