Installing Pip for Python 3.x

Question

I am following instructions from http://www.leighsheneman.com/2014519easy-python-setup-for-a-mac/ to setup my mac for a development environment. I have successfully installed Python 2 and Python 3 via Homebrew, and after some steps to install related packages like SciPy, I get to the point of installing pip . Pip for Python 2.x installs perfectly with no trouble, via the command sudo easy_install pip . When it comes to pip for Python 3, I tried the command sudo easy_install pip3 as mentioned in the document I am following, and receive this error:

Searching for pip3
Reading https://pypi.python.org/simple/pip3/
Couldn't find index page for 'pip3' (maybe misspelled?)
Scanning index of all packages (this may take a while)
Reading https://pypi.python.org/simple/
No local packages or working download links found for pip3
error: Could not find suitable distribution for Requirement.parse('pip3')

What could be the problem in this case?

Answer 1

Homebrew installs pip for you when you install Python. brew install python3 would have installed Python 3.6.0, and also pip3 . You can then type pip3 in the terminal to run pip for Python 3. You don't need to use easy_install at all.

Answer 2

The article you posted is plain wrong stating that you can install the pip3 package. (If you check it out, you'll see that it tries to resolve https://pypi.python.org/simple/pip3/ , which doesn't exist.)

Installing pip for a specific environment is done by executing the script (in this instance, easy_install ) in the context of that specific python environment.

Right now, your easy_install script is running using your python2 environment.

When you install two python environments, the easy_install script will be defaulting to one of them. In the background, there are actually two easy_install scripts for you. One, easy_install-2.x and one easy_install-3.x , x being the relevant minor version.

So to install pip using the python3 easy_install, just run:

$ sudo easy_install-3.x pip

Or, alternatively, just run the easy_install script using python3 :

$ sudo python3 $(which easy_install) pip

Regardless of that, I think you would be better off using the get-pip.py ( https://bootstrap.pypa.io/get-pip.py ) script instead which would make your life easier.

Answer 3

Following the official Documentation it says :

To install pip, securely download get-pip.py :

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py

Then run the following:

python get-pip.py

OR

python3 get-pip.py

Answer 4

You should already have pip2 and pip3 if you used homebrew to install python2.x and python3.x. Try running pip3 -V in the terminal and see if it works. You can use pip3 install package-name to install python3 packages and pip2 install package-name to install python2 packages.

Run which pip to see the default default path.

Answer 5

如果您具有Python但没有pip，则可以在此处获得官方说明： https ： //pip.pypa.io/zh/latest/installing/