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Henry Pestov
Henry Pestov

Download 2021 Python 2.7 Mac



The source tarballs are signed with Benjamin Peterson's key (fingerprint: 12EF3DC3 8047 DA38 2D18 A5B9 99CD EA9D A413 5B38). The Windows installer was signedby Martin von Löwis' public key, which has a key id of 7D9DC8D2. The Macinstallers were signed with Ronald Oussoren's key, which has a key id ofE6DF025C. The public keys are located on the download page.




Download Python 2.7 Mac



Setuptools enables you to download and install any compliant Pythonsoftware over a network (usually the Internet) with a single command(easy_install). It also enables you to add this network installationcapability to your own Python software with very little work.


will be to install Python 2.7 with the Python 2Miniconda and to install Python 3.8 with the Python3 Miniconda. You can override the default byexplicitly setting python=2 or python=3. Italso determines the default value of CONDA_PYwhen using conda build.


Many users have dozens of Python interpreters on their computer already, but have no idea how to manage them effectively. Too often, people just download the latest Python release, move it to their path, and call it a day (or use brew install python3, which would do something similar). This can cause breakages down the line in frustrating ways that can be difficult to troubleshoot.


This strategy works, but it isn't ideal for making future updates to Python. It means we have to remember to check the website and download the new files since Python doesn't include a command-line way to update.


I did all the steps as mentioned and they showed everything with python 3.7, except when in the end I do a python -V, it still shows the version as 2.7. Any idea how I could override the python version?


Hey Sauav! When you run `which python` does it show a shim pathway or a direct pathway to /usr/bin/python? If it's the latter, make sure you have the `eval "$(pyenv init -)"` statement in your .bashrc or .zshrc depending on your shell.


An update on realpython.com/intro-to-pyenv/ I had issues with pyenchant not being able to find enchant C library when I used pyenv installer as suggested in this link. However, when I used brew install for all packages including pyenv, pyenv-virtualenv - I was able to have multiple python virtual environments on 2.7.18, 3.9.9 on latest Monterey using M1 silicon 14" pro.


Came across this post/thread with a problem I'm having. I'm simply trying to run a .py script on macos Monterey 12.5.1, that I found online, to see why my current/active window I'm working in loses focus. When I go to run the script, it returns an error 'ImportError: cannot import name 'NSWorkspace' from 'AppKit'. Anyone know why appkit won't import in python3, and what I need to do to rectify this error?Thanks!


Note: Take note of the -dev in the cv2.__version__ . This indicates that we are using the development version of OpenCV and not a tagged release. Once OpenCV 3.2 is released these instructions can be updated to simply download a .zip of the tagged version rather than having to clone down the entire repositories.


The Apple-provided build of Python is installed in/System/Library/Frameworks/Python.framework and /usr/bin/python,respectively. You should never modify or delete these, as they areApple-controlled and are used by Apple- or third-party software. Remember thatif you choose to install a newer Python version from python.org, you will havetwo different but functional Python installations on your computer, so it willbe important that your paths and usages are consistent with what you want to do.


With older versions of Python, there is one macOS quirk that you need to beaware of: programs that talk to the Aqua window manager (in other words,anything that has a GUI) need to be run in a special way. Use pythonwinstead of python to start such scripts.


The standard Python GUI toolkit is tkinter, based on the cross-platformTk toolkit ( ). An Aqua-native version of Tk is bundled with OSX by Apple, and the latest version can be downloaded and installed from ; it can also be built from source.


As of macOS 12.3+, Python 2 which was installed by default at /usr/bin/python have been removed. This can lead to a lot of issues for developers that need to use Python 2 or that use other tools that depend on it.


If you just downloaded the installer and deleted it, that shouldn't be a problem. Since Mac comes with Python 2 by default, if you haven't gotten rid of it, you should be able to open up a terminal and type in python to get a Python 2 prompt.


If you somehow uninstalled Python 2.7, then you can download a new copy of Python 2.7 from this page. (You probably want the "macOS 64-bit installer"). Download it and install it (I think the built-in app Installer can open it) and you should have Python 2 back again.


On Windows, by default python and pip are not on the PATH.You can re-install Python and tick this option, or give the full path instead.Try something like this, depending on where your copy of Python is installed:


Please note that Biopython 1.48 and older require the Numeric library,not its replacement NumPy. Windows installers for Python 2.4 and olderare available from the NumericalPython website. A Windowsinstaller for Numeric 24.2 for Python 2.5 is available here:


The bash profile is a set of instructions that are run by the shell when the user logs in to bash. You can add a variety of preferences to the bash profile, including modifications to the PATH. When anaconda, miniconda or other versions of python are installed they automatically add paths to their respective versions of python to the top of the bash profile.


To remove particular versions of python, you have to refer to the particular framework. The frameworks are installed in /Library/Frameworks/Python.framework and particular versions are found in /Library/Frameworks/Python.framework/Versions/X.Y. So for example if you wanted to uninstall only version 3.5 but leave other versions you would enter the following commands in bash:


Use the curl command to download the installation script. The following command uses the -O (uppercase "O") parameter to specify that the downloaded file is to be stored in the current folder using the same name it has on the remote host.


Run the script with the python or python3 command to download and install the latest version of pip and other required support packages. When you include the --user switch, the script installs pip to the path /.local/bin.


Congratulations, that should do it! If you ever want to upgrade one of these in the future revisit the appropriate download page and get the latest .dmg file. Fire up Python at a terminal and make sure things worked. The following should work in Python with no errors:


I think this means that the installed numpy does not match the installed Python. You must take some care when downloading the installers so that they match the Python you installed and your OS version. For example, at the NumPy 1.6.2 download page there is an installer for Python 2.7 and Mac OS 10.6 that is probably your best bet (see ). Do you recall which NumPy installer you downloaded? The same advice goes for choosing the SciPy and matplotlib installers as well.


Homebrew lets you install, update, and uninstall packages from the command line, just like apt-get does for Ubuntu. It makes it much easier to install all the various tools you might need. For example, here are just a few things I've installed with it: android-sdk, go, mongodb, sqlite, git, imagemagick, lua, python3.


To install, just click the link above, then click on the version you want. The latest version 2 and 3 links are at the top. Once you've clicked on the version you want, you should see a list of downloads for different operating systems and package types (like source code tarballs, installers, etc).


I'd recommend using the installer since it'll handle everything for you. Just make sure you download the installer that matches your CPU architecture type (32 or 64-bit). In my case I'd be downloading Mac OS X 64-bit/32-bit installer.


Type python3 in your terminal, if you see similar warning as the pic shown below, it means you will need to install Python 3 (see the steps below for installation). If you see older version (


The Debian/Ubuntu package is split in three different packages calledpython3-sklearn (python modules), python3-sklearn-lib (low-levelimplementations and bindings), python3-sklearn-doc (documentation).Only the Python 3 version is available in the Debian Buster (the more recentDebian distribution).Packages can be installed using apt-get:


UPDATE: 02/02/2023 : After thousands of visits in the past years, a windows archive was downloaded more than 70K times, everything was wiped and updated for a new installation with CONDA =D


I upgraded my archive with this package (for 32 and 64 bits) so now all that you have to do is to download again the archive and run (double click) on install_pymol.bat =D I tried on a clean install and it (should) works!


hello, I did all that you said. My computer is 32 bits and i downloaded the 32 bit python and the respective pymol archive. I put the pymol folder inside the Python folder, and if i open a cmd window I can see the pymol file inside the Python (C:\Python27\Pymol_win_32>).


Hi Markus,just download the 1.7.6 version of PyMOL from gohlke/pythonlibs/ and put it in the extracted folder with the installation files you downloaded from here. Replace the 1.7.5 in the bat file with 1.7.6 (simply open with Notepad). It then works in the same way as described above.


I am trying to install pymol but I am getting the message below. I have installed python in a folder without space (I saw a reply of yours to someone with similar error) and then extracted the pymol files in a separate (from python) folder on C:\ drive.


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