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ImportError: No module named _winreg, Installing pypiwin32==219 on MacOS X

I am trying to install pypiwin32==219 in my virtual environment from a requirements.txt file.
requirements.txt
pypiwin32==219
I have setup a virtualenv denv in which I am working.
(denv) Nehas-MacBook-Pro:dash_pdf neha$ pip install -r requirements.txt
I got this traceback error:
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/private/var/folders/_y/g09fpxn13xq7z6ptmq3095dm0000gn/T/pip-install-7zp59n5n/pypiwin32/setup.py", line 121
print "Building pywin32", pywin32_version
^
SyntaxError: Missing parentheses in call to 'print'. Did you mean print("Building pywin32", pywin32_version)?
which really is a python version issue so I switched to the command:
(denv) Nehas-MacBook-Pro:dash_pdf neha$ pip2 install -r requirements.txt
upon which I get this traceback error:
Using cached https://files.pythonhosted.org/packages/2b/ca/5c086c18de8f70222787b3e824e755b68d99272531522e77bb381d4f60c8/pypiwin32-219.zip
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/private/var/folders/_y/g09fpxn13xq7z6ptmq3095dm0000gn/T/pip-install-KEpN56/pypiwin32/setup.py", line 83, in <module>
import _winreg
ImportError: No module named _winreg
I googled some and I found that _winreg required Windows. No way I can get pypiwin32==219 to work on MacOS? Or any other modules I can use with the same functionality?

i suggest, that winreg is only for Windows

pip installation error when installing a package

So, I'm currently trying to install this package:
pip install git+https://github.com/Rapptz/discord.py#async
Github here: https://github.com/Rapptz/discord.py
but I get this error:
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/tmp/pip-build-khtOce/aiohttp/setup.py", line 61, in <module>
raise RuntimeError("aiohttp requires Python 3.4.1+")
RuntimeError: aiohttp requires Python 3.4.1+
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-khtOce/aiohttp/
So instead I have tried using pip3 to install the same package, but I'm currently getting a version conflict which I do not know how to solve.
Traceback (most recent call last):
File "/usr/local/bin/pip3", line 9, in <module>
load_entry_point('pip==8.1.1', 'console_scripts', 'pip3')()
File "/usr/local/lib/python2.7/dist-packages/distribute-0.6.14- py2.7.egg/pkg_resources.py", line 305, in load_entry_point
return get_distribution(dist).load_entry_point(group, name)
File "/usr/local/lib/python2.7/dist-packages/distribute-0.6.14-py2.7.egg/pkg_resources.py", line 2243, in load_entry_point
raise ImportError("Entry point %r not found" % ((group,name),))
ImportError: Entry point ('console_scripts', 'pip3') not found
I remember doing this yesterday, and I may have toyed around installing and reinstalling pip, but before, when I tried to install the same package when pip3 was working, I still remember getting the same error, so idk if solving the version conflict will do much.

I think you have a setuptools conflict here which will probably be resolved by updating setuptools.
Try:
pip install setuptools --upgrade
You can remove the previous setuptools installation in case it gives you a problem.

pip install hyperopt and hyperas fail

I was trying to install hyperopt, but I got the following error:
Collecting hyperopt
Using cached hyperopt-0.0.2.tar.gz
Complete output from command python setup.py egg_info:
DEBUG:root:distribute_setup.py not found, defaulting to system setuptools
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/tmp/pip-build-gmhldfe7/hyperopt/setup.py", line 119, in <module>
if package_data is None: package_data = find_package_data(packages)
File "/tmp/pip-build-gmhldfe7/hyperopt/setup.py", line 102, in find_package_data
for subdir in find_subdirectories(package):
File "/tmp/pip-build-gmhldfe7/hyperopt/setup.py", line 73, in find_subdirectories
subdirectories = os.walk(package_to_path(package)).next()[1]
AttributeError: 'generator' object has no attribute 'next'
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-gmhldfe7/hyperopt/
And I got the same error when intalling hyperas. But I can install ggplot successfully by using pip command. I am using Ubuntu 14.04 and Python 3.5.
Thanks.

This is a bug in hyperopt. generator.next was renamed to generator.__next__ which can be invoked with next(generator) in Python3.
Here is the PEP detailing the change.
Looks like it was fixed in master but never released. You can install from git (which means github as well) by doing the following:
pip install git+https://github.com/hyperopt/hyperopt.git

ImportError: No module named extern;

I'm trying to install fuel and blocks with
pip install git+git://github.com/mila-udem/blocks.git#v0.0.1
pip install git+git://github.com/mila-udem/fuel.git#v0.0.1
(I was using the root account)
Then I encountered the problem
pip install git+git://github.com/mila-udem/fuel.git#v0.0.1
Downloading/unpacking git+git://github.com/mila-udem/fuel.git#v0.0.1
Cloning git://github.com/mila-udem/fuel.git to /tmp/pip-PnqUs3-build
Running setup.py (path:/tmp/pip-PnqUs3-build/setup.py) egg_info for package from git+git://github.com/mila-udem/fuel.git
Traceback (most recent call last):
File "<string>", line 3, in <module>
File "build/bdist.linux-x86_64/egg/setuptools/__init__.py", line 11, in <module>
File "build/bdist.linux-x86_64/egg/setuptools/extern/__init__.py", line 1, in <module>
ImportError: No module named extern
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "", line 3, in <module>
File "build/bdist.linux-x86_64/egg/setuptools/__init__.py", line 11, in <module>
File "build/bdist.linux-x86_64/egg/setuptools/extern/__init__.py", line 1, in <module>
ImportError: No module named extern
----------------------------------------
Cleaning up...
I have tried to reinstall/update setuptools and still can't get it work. Thanks.

download: https://pypi.python.org/pypi/extern/0.1.0
install: tar zxf extern-0.1.0.tar.gz && python setup.py install

I had the same issue on CentOS7 and got it resolved by doing:
pip install -U extern
You can cross check in your active python version, if you can import the module extern. If that works, then rebuild your easy_install from the downloaded ez_setup.py. e.g. /opt/bin/python ez_setup.py
This will include the extern module into the easy_install routine and the error doesn't show up anymore.
Running then /opt/bin/easy_install <your.egg> should do the job. Note: if you have more than one python version, use fully qualified names or softlinks you created in /usr/bin/

python-daemon 2.0.5 won't install with pip

I am getting errors when trying to install python-daemon 2.0.5 with pip & python 2.6. I know there are other questions that refer to python-daemon 2.0.3 having this problem. But those answers indicate it should be fixed now.
I've tried installing older versions as well without luck. Although if I start over with a fresh virtualenv I am able to install 1.5.6 . However in this virtualenv I get the same error with 2.0.5 and 1.5.6
(py26)[brianb#api proj]$ pip install python-daemon
Downloading/unpacking python-daemon
Downloading python-daemon-2.0.5.tar.gz (71Kb): 71Kb downloaded
Running setup.py egg_info for package python-daemon
Traceback (most recent call last):
File "<string>", line 14, in <module>
File "/home/brianb/py26/build/python-daemon/setup.py", line 26, in <module>
import version
File "version.py", line 438
for item in versions}
^
SyntaxError: invalid syntax
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "<string>", line 14, in <module>
File "/home/brianb/py26/build/python-daemon/setup.py", line 26, in <module>
import version
File "version.py", line 438
for item in versions}
^
SyntaxError: invalid syntax
----------------------------------------
Command python setup.py egg_info failed with error code 1
Storing complete log in /home/brianb/.pip/pip.log

This is strange! I tried to upgrade virtualenv too, but this did not work out.
To get it running, I had to upgrade to Python 2.7.