I recently shifted to a Macbook. I installed Python 3.8 and installed Pyperclip using pip install pyperclip in the terminal, which was successful. When I tried to import it in IDLE shell, I get the error
ModuleNotFoundError: No module named 'pyperclip'.
On looking around I found that pyperclip has been installed in-
/Users/aamodpant/Library/Python/2.7/lib/python/site-packages/pyperclip
I did not install Python 2.7 but it must be required for macOS, so I don't want to delete it. How do I change the "default" version of Python for installing new libraries?
Use :
python3 -m pip install pyperclip
This will install the package for python3.
You can reinstall or upgrade pyperclip using sudo:
pip3 install -U pyperclip
Also, run your script using python3 instead of just python:
python3 script.py
The best is to use alias, as this answer describes changing default Python version in Mac can cause multiple issues.
alias python=python3
alias pip=pip3
The answer you are probably looking for is You should not change this.
Otherwise, you may like to set Python 3 as default, there are many ways to do it. But do it with caution as the guides suggest below.
The official documentation: Using Python on a Macintosh, some well described very good guides: The right and wrong way to set Python 3 as default on a Mac, Installing Python 3 on Mac OS X.
Related
I'm trying to install Selenium using pip. But when I go to my editor (pycharm CE running on 3.8) no such module exists. When I type python -version on terminal it comes up with python 2.7 with a deprecation warning. How to I change this? I'm pretty sure I have to change my path or something like that, but how? Any help is greatly appreciated.
That's because python2.7 is installed by default on Mac. Python3.8 is probably installed besides 2.7. Use python3.8 command and python3.8 -m pip install selenium to install selenium for this specific python version. If pip is not installed for python3.8, install it the official way.
Don't replace system python, because that might break your OS.
I've seen many threads about this, and have tried all options except for completely wiping Python off of my machine and re-downloading everything...
I'm using a Windows 10, 64-bit machine, and had already downloaded Python2.7. Commands like 'C:\>pip install seaborn' were not an issue.
I recently downloaded Python3.6, and now my pip will not work - it returns the error in the title.
I have added C:\Python27, C:\Python36, C:\Python27\Scripts, C:\Python36\Scripts to my Path, and still it won't work.
If I type in the command C:\>python27 -m pip install seaborn, however, the pip works. I am really confused why I can no longer just type in pip install and have it work.
Thanks in advance!
You have two versions of Python added to path. To differentiate between 2.7 and 3.6 you have to tell it which version you want otherwise each pip conflicts with the other (it does not know what to install and where) in other words you type pip you could either mean for Python 2 or for Python 3.
Do not rename pip it will break your system (you should not need to rename). Instead use those already provided..
Your system should have these already:
pip is universal. Best for one installation.
pip3 for Python 3. Best to distinguish between Python 2 and 3
pip3.6 to distinguish between different Python 3 installations.
The same goes for Python 2 installation.
pip, pip2 and pip2.7.
You need to use either pip3 (or pip2) or pip3.6 (or pip2.7) to install in future. This will allow the different versions to be recognised:
For Python 2:
pip2 install seaborn
For Python 3:
pip3 install seaborn
You should also now use shebang lines as well now (if you are not already) to distinguish between versions.
the issue is the ambiguity between the two pip that you've mentioned in the Environments. As you mentioned the issue only started occurring when you installed python3 on the same system where python2 was installed and both have pip and hence when you fire up pip in your cmd, Windows System isn't able to pick one out of the two.
Why does your C:>python27 -m pip install seaborn work?
Well it's quite simple, since you've mentioned the python27 there, windows knows exactly which pip you're talking about.
How to fix it?
see the edits for this section. (I tried this, it didn't work) Removed it from the final answer to avoid confusion.
Alternatively, what you can do is,
rename your python.exe for python 3 to python3. Don't forget to put it inside your PATH environment. Just use python for python 2, python3 for python 3.
Their pip are separated, pip for python 2. pip3 for python 3.
Now, run and see the below commands behave:
# will return the default version of pip
pip --version
# will use the Python 2 version of pip
pip2 --version
# will use the Python 3 version of pip
pip3 --version
Okay so I finally worked it out...
I uninstalled Python3.6 and deleted all relevant folders.
I then went to Control Panel>Programs>Progams and Features and repaired my Python2.7 program. pip works now (I think it got messed up since I tried to rename the universal pip.exe file -> don't do that!!).
After re-downloading Python3.6, I put my universal pip.exe download from Python3 in a different directory so the Path would not get it confused. I now have Paths for both pip2 and pip3 and all is okay.
Thanks for your help!
This is how I solved this issue on my end: (short answer, remove this folder C:\Python27)
Problem: I installed python 3, after uninstalling python 2.7. The issue here is that pip remains behind even after you uninstall python 2.7.
Solution:
1. Uninstall python 3 (if you have it installed).
2. Just in case, I would uninstall python 2.7.
3. This is the key: go to C:\Python27 ... and delete the entire directory (which also contains pip).
This solution is good for those that are fine with ONLY running Python 3 on their machines (which was my case).
When I run python -V from terminal, I see that Python 2.7.10 is installed. I want to keep this as the "global" version as OSX utilizes it.
When I run Idle, I see that Python 3.6.0 is running. How do I install libraries to this version of Python?
For example, if I run pip install bs4, the library is installed here beautifulsoup4 in /Library/Python/2.7/site-packages/beautifulsoup4-4.5.3-py2.7.egg - which is obviously Python 2.7.
So when I run my script from Idle, I get the following error:
ModuleNotFoundError: No module named 'bs4'
You want to use virtualenv. It sounds like you have two versions of Python installed and you need to focus on one while being able to manage the packages in each. Virtualenv will do this for you.
First install virtualenv (https://virtualenv.pypa.io/en/stable/),
Second run it specifying the version of python you want as so: `virtualenv -p /usr/bin/python2.6
Third you can use pip to install packages directly into this environment. This increases the amount of disk space you need, but will allow you greater control over your code.
When you have two versions of python, you will need to specify which version of python you would like to run. You can do this with the activate command. For example:
activate python3
Once you have activated the python 3 environment, you can then run pip:
pip3 install bs4
which will install the beautiful soup library in your python 3 environment.
Another answer was found here: https://stackoverflow.com/a/4910393/1580659
pipVERSIONNUMBER install will install the library to the correct version of Python.
$ pip2.6 install otherpackage
$ pip2.7 install mybarpackage
All I want to do is run a Python script that requires Python 2.7 & Requests on my Ubuntu 10.04 EC2 box.
I installed Python 2.7, no problem. "python" by itself still points to python 2.6, which is very annoying, b/c I'm not sure how ubuntu will freak if I change the symlink /usr/bin/python to point to 2.7.
I followed the (carefully buried) install instructions for pip (at http://www.pip-installer.org/en/latest/index.html, and which are WAY too hard to find if they aren't the ABSOLUTE FIRST command on the "install pip" page)
So, the real problem here is that pip install requests completes successfully, but only installs for python 2.6, not 2.7. The pip usage instructions say nothing about how to install a package for a specific version of python.
How do I do this?
I just want to run my python script that requires 2.7 + requests.
First install pip for your 2.7 distribution using easy_install (easy_install should definitely be included with your 2.7 distribution):
easy_install-2.7 -U pip
Then install what you need:
pip-2.7 install requests
Then you can run code with python2.7 instead of python.
Yeah it would be a bad idea to change the link pointing to which python version. Instead, can you change the shebang to say #!/usr/bin/env python2.7 instead of #!/usr/bin/env python ?
Though python2.7 /path/to/pip install requests might work; you should install pip for python2.7 separately instead.
If you don't use virtualenv then invoke pip as pip-2.7 (the command is available if you install pip for python2.7).
Follow installation instructions which is the first item in the table of contents. Substitute python with python2.7 in the instructions.
I recently tried to install a couple of python modules via easy_install on my mac.
Background:
I'm using OS X 10.6.8 and Python 2.7.2. If I run which python I get the following:
/Library/Frameworks/Python.framework/Versions/2.7/bin/python
Problem:
If I try to install a package, say easy_install cssutils - it finds the package, downloads and says it's installed, but when I then open python and type import cssutils - it says the package isn't found.
This has happened with multiple packages, but they do however work if the package has it's own installer script and I run that.
How can I get easy_install to install the packages correctly?
Typing:
head -1 `which easy_install`
at the command line will show the interpreter that easy_install is using. If it doesn't match the python version you're using, you may need to install setup tools for the version of python you're using. Alternately, if the correct version of easy install is present, you can either run it by using an absolute path, reference the specific easy_install variant (e.g. easy_install-2.7), or update your path.