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configure: error: Mesos requires Python < 3.0

I want to install Mesos on Oracle Linux 8.3 which does not have Internet access. I followed the process exactly in its site in part CentOS 7.1 and installed some packages before building mesos. I installed these packages using rpm -i name of package:
glib2-2.56.4-156.el8.x86_64.rpm
glib2-2.56.4-8.el8.x86_64.rpm
glib2-devel-2.56.4-156.el8.x86_64.rpm
glib2-devel-2.56.4-8.el8.x86_64.rpm
libcurl-7.61.1-14.el8.x86_64.rpm
libcurl-devel-7.61.1-14.el8.x86_64.rpm
libsecret-devel-0.18.6-1.el8.x86_64.rpm
libserf-1.3.9-9.module_el8.4.0+632+d2bf8782.x86_64.rpm
pcre-8.42-4.el8.x86_64.rpm
pcre-cpp-8.42-4.el8.x86_64.rpm
pcre-devel-8.42-4.el8.x86_64.rpm
pcre-utf16-8.42-4.el8.x86_64.rpm
pcre-utf32-8.42-4.el8.x86_64.rpm
cyrus-sasl-md5-2.1.27-5.el8.x86_64.rpm
python2-2.7.15-24.el8.x86_64.rpm
python2-2.7.18-7.module_el8.5.0+894+1c54b371.x86_64.rpm
python2-devel-2.7.15-24.el8.x86_64.rpm
python2-libs-2.7.15-24.el8.x86_64.rpm
python2-libs-2.7.18-7.module_el8.5.0+894+1c54b371.x86_64.rpm
python2-pip-9.0.3-18.module_el8.4.0+642+1dc4fb01.noarch.rpm
python2-pip-wheel-9.0.3-18.module_el8.5.0+743+cd2f5d28.noarch.rpm
python2-setuptools-wheel-39.0.1-13.module_el8.5.0+743+cd2f5d28.noarch.rpm
sqlite-devel-3.26.0-11.el8.x86_64.rpm
subversion-1.10.2-4.module_el8.3.0+703+ba2f61b7.x86_64.rpm
subversion-devel-1.10.2-4.module_el8.3.0+703+ba2f61b7.x86_64.rpm
subversion-libs-1.10.2-4.module_el8.3.0+703+ba2f61b7.x86_64.rpm
utf8proc-2.1.1-5.module_el8.3.0+703+ba2f61b7.x86_64.rpm
zlib-devel-1.2.11-16.el8_2.x86_64.rpm
Also, I installed python2.7 in this way:
tar zxvf Python-2.7.15.tgz
./configure --enable-optimizations
make altinstall
After that I set its path in ~/.bashrc like this:
alias python=/usr/local/bin/python2.7
export PATH=$PATH:/usr/local/bin/python2.7
For its pip also I run this command:
python2.7 -m ensurepip --default-pip
When I run python --version it show me Python 2.7.15.
Again extract Mesos folder and create build directory, then run ../configure; but I receive the same error before installing python 2.7.15:
configure: error: Mesos requires Python < 3.0
-------------------------------------------------------------------
The detected Python version is 3.6.
If you already have Python 2.6+ installed (and it's the default python on the path), you might want to check if you have the PYTHON environment variable set to a version of Python greater than 3.0.
However, when I run python command and receive this result which show that python 2.7.15 is default, mesos recognize python 3.6:
Python 2.7.15 (default, Sep 10 2022, 16:33:49)
Output of printenv:
LD_LIBRARY_PATH=/opt/oracle/instantclient_21_4:/opt/oracle/instantclient_21_4:/opt/oracle/instantclient_21_4:
LS_COLORS=rs=0:di=38;5;33:ln=38;5;51:mh=00:pi=40;38;5;11:so=38;5;13:do=38;5;5:bd=48;5;232;38;5;11:cd=48;5;232;38;5;3:or=48;5;232;38;5;9:mi=01;05;37;41:su=48;5;196;38;5;15:sg=48;5;11;38;5;16:ca=48;5;196;38;5;226:tw=48;5;10;38;5;16:ow=48;5;10;38;5;21:st=48;5;21;38;5;15:ex=38;5;40:*.tar=38;5;9:*.tgz=38;5;9:*.arc=38;5;9:*.arj=38;5;9:*.taz=38;5;9:*.lha=38;5;9:*.lz4=38;5;9:*.lzh=38;5;9:*.lzma=38;5;9:*.tlz=38;5;9:*.txz=38;5;9:*.tzo=38;5;9:*.t7z=38;5;9:*.zip=38;5;9:*.z=38;5;9:*.dz=38;5;9:*.gz=38;5;9:*.lrz=38;5;9:*.lz=38;5;9:*.lzo=38;5;9:*.xz=38;5;9:*.zst=38;5;9:*.tzst=38;5;9:*.bz2=38;5;9:*.bz=38;5;9:*.tbz=38;5;9:*.tbz2=38;5;9:*.tz=38;5;9:*.deb=38;5;9:*.rpm=38;5;9:*.jar=38;5;9:*.war=38;5;9:*.ear=38;5;9:*.sar=38;5;9:*.rar=38;5;9:*.alz=38;5;9:*.ace=38;5;9:*.zoo=38;5;9:*.cpio=38;5;9:*.7z=38;5;9:*.rz=38;5;9:*.cab=38;5;9:*.wim=38;5;9:*.swm=38;5;9:*.dwm=38;5;9:*.esd=38;5;9:*.jpg=38;5;13:*.jpeg=38;5;13:*.mjpg=38;5;13:*.mjpeg=38;5;13:*.gif=38;5;13:*.bmp=38;5;13:*.pbm=38;5;13:*.pgm=38;5;13:*.ppm=38;5;13:*.tga=38;5;13:*.xbm=38;5;13:*.xpm=38;5;13:*.tif=38;5;13:*.tiff=38;5;13:*.png=38;5;13:*.svg=38;5;13:*.svgz=38;5;13:*.mng=38;5;13:*.pcx=38;5;13:*.mov=38;5;13:*.mpg=38;5;13:*.mpeg=38;5;13:*.m2v=38;5;13:*.mkv=38;5;13:*.webm=38;5;13:*.ogm=38;5;13:*.mp4=38;5;13:*.m4v=38;5;13:*.mp4v=38;5;13:*.vob=38;5;13:*.qt=38;5;13:*.nuv=38;5;13:*.wmv=38;5;13:*.asf=38;5;13:*.rm=38;5;13:*.rmvb=38;5;13:*.flc=38;5;13:*.avi=38;5;13:*.fli=38;5;13:*.flv=38;5;13:*.gl=38;5;13:*.dl=38;5;13:*.xcf=38;5;13:*.xwd=38;5;13:*.yuv=38;5;13:*.cgm=38;5;13:*.emf=38;5;13:*.ogv=38;5;13:*.ogx=38;5;13:*.aac=38;5;45:*.au=38;5;45:*.flac=38;5;45:*.m4a=38;5;45:*.mid=38;5;45:*.midi=38;5;45:*.mka=38;5;45:*.mp3=38;5;45:*.mpc=38;5;45:*.ogg=38;5;45:*.ra=38;5;45:*.wav=38;5;45:*.oga=38;5;45:*.opus=38;5;45:*.spx=38;5;45:*.xspf=38;5;45:
LC_MEASUREMENT=az_IR
M2_HOME=/usr/local/maven
SSH_CONNECTION=x.x.x.x 57648 xx.xx.xx.xx 22
LC_PAPER=az_IR
LC_MONETARY=az_IR
LANG=en_US.UTF-8
HISTCONTROL=ignoredups
HOSTNAME=kr311
OLDPWD=/root/Downloads/mesos/mesos-1.11.0
JAVA_HOME=/opt/oracle/java/jdk1.8.0_25
S_COLORS=auto
LC_NAME=az_IR
XDG_SESSION_ID=2
USER=root
PYSPARK_HOME=/usr/bin/python3.8
SELINUX_ROLE_REQUESTED=
PWD=/root/Downloads/mesos/mesos-1.11.0/build
SSH_ASKPASS=/usr/libexec/openssh/gnome-ssh-askpass
HOME=/root
SSH_CLIENT=x.x.x.x 57648 22
SELINUX_LEVEL_REQUESTED=
XDG_DATA_DIRS=/root/.local/share/flatpak/exports/share:/var/lib/flatpak/exports/share:/usr/local/share:/usr/share
LC_ADDRESS=az_IR
SPARK_HOME=/opt/spark
LC_NUMERIC=az_IR
SSH_TTY=/dev/pts/0
MAIL=/var/spool/mail/root
TERM=xterm-256color
SHELL=/bin/bash
SELINUX_USE_CURRENT_RANGE=
PYSPARK_DRIVER_PYTHON=python3.8
SHLVL=1
LC_TELEPHONE=az_IR
LOGNAME=root
DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/0/bus
XDG_RUNTIME_DIR=/run/user/0
PYSPARK_PYTHON=/usr/bin/python3.8
PATH=/opt/oracle/instantclient_21_4:/opt/oracle/java/jdk1.8.0_25/bin:/opt/oracle/instantclient_21_4:/usr/local/bin/python2.7:/opt/oracle/java/jdk1.8.0_25/bin:/opt/oracle/instantclient_21_4:/opt/oracle/java/jdk1.8.0_25/bin:/usr/local/maven/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/usr/local/bin/python2.7:/opt/spark/bin:/opt/spark/sbin:/root/bin:/opt/spark/bin:/opt/spark/sbin:/usr/local/bin/python2.7:/opt/spark/bin:/opt/spark/sbin
LC_IDENTIFICATION=az_IR
HISTSIZE=1000
LESSOPEN=||/usr/bin/lesspipe.sh %s
LC_TIME=az_IR_=/usr/bin/printenv
Would you please guide me what is wrong here?
Any help is really appreciated.

Python3.6 ImportError: cannot import name 'main' Linux RHEL6

My ultimate goal is to download and install awscli
http://docs.aws.amazon.com/cli/latest/userguide/awscli-install-linux.html
Seems python and pip are required in order to accomplish my goal.
Installing python via yum isn't working for me, so I downloaded and installed python3 manually as follows:
wget https://www.python.org/ftp/python/3.6.1/Python-3.6.1.tar.xz
tar xf Python-3.6.1.tar.xz
cd Python-3.6.1.tar.xz
./configure
make
sudo make altinstall
When I do
pip3.6 --version
I get this:
Traceback (most recent call last):
File "/usr/local/bin/pip3.6", line 7, in <module>
from pip import main
ImportError: cannot import name 'main'
Environment:
RHEL 6.6
Accessed via ssh
What is going on? How to install pip and python3.6 correctly on my linux box?
Edit:
When trying to install via yum it fails so I am trying to avoid using yum:
[asemani#rcdc9pfda5r Python-3.6.1]$ sudo yum -y install python-pip
[sudo] password for asemeani:
Loaded plugins: security
Setting up Install Process
No package python-pip available.
Error: Nothing to do
Another Edit:
After importing sys and then called sys.path this is what I get:
[asemani#rcdc9pfda5r Python-3.6.1]$ python3.6
Python 3.6.1 (default, Apr 28 2017, 11:03:27)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-17)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path
['', '/usr/local/lib/python36.zip', '/usr/local/lib/python3.6', '/usr/local/lib/python3.6/lib-dynload', '/usr/local/lib/python3.6/site-packages']
>>> quit()
[asemani#rcdc9pfda5r Python-3.6.1]$ ls -l /usr/local/lib/python3.6/site-packages
total 32
-rw------- 1 root root 126 Apr 27 23:45 easy_install.py
drwx------ 11 root root 4096 Apr 27 23:45 pip
drwx------ 2 root root 4096 Apr 27 23:45 pip-9.0.1.dist-info
drwx------ 5 root root 4096 Apr 27 23:45 pkg_resources
drwx------ 2 root root 4096 Apr 27 23:45 __pycache__
-rw-r--r-- 1 root root 119 Apr 27 23:45 README.txt
drwx------ 5 root root 4096 Apr 27 23:45 setuptools
drwx------ 2 root root 4096 Apr 27 23:45 setuptools-28.8.0.dist-info

You need to edit the pip3 file like so (your path could be different):
nano /Library/Frameworks/Python.framework/Versions/3.6/bin/pip3
And change the import main line so it says:
from pip._internal import main
After this change, my pip3 started to work and I am on macOS. If you are using Linux, your path could be something like /usr/bin/pip3
I found this tip and more information from this thread:
https://github.com/pypa/pip/issues/5240

Don't invoke pip/pip3 directly, which are shortcuts at different locations for different user and they are not well maintained when you upgrade pip (check 'which pip' and 'sudo which pip').
$ sudo python -m pip install xxx #for python2
$ sudo python3 -m pip install xxx #for python3
These commands do not take shortcuts and directly invoke pip module, which is maintained very well (also works on Windows)

My OS is Linux Mint 18
sudo nano /usr/bin/pip3
Change
from pip import main
To
from pip._internal import main

sudo chmod -R a+rx /usr/local/lib/python3.6/site-packages
You can see the problem right there in your ls -l /usr/local/lib/python3.6/site-packages output that your pip directory is only readable by the owner, which is root.

Do a cd /usr/bin
Then sudo nano pip so as to edit the pip file
Change from pip import main to from pip._internal import main
This will resolve the issue

try the following as a way around the issue until it got solved
sudo python -m pip --version
>> pip 10.0.1 from /usr/local/lib/python2.7/site-packages/pip (python 2.7)
sudo python -m pip install numpy --upgrade
>> Requirement already up-to-date: numpy in /usr/local/lib/python2.7/site-packages (1.14.2)

I don't exactly know the answer, but: that error indicates that the script can find some package called pip, but not the right one. Probably, an old version of pip, from back before they created a main method (you can check pip.__version__ from the python shell).
I'm willing to bet that you still have another, older version of python installed which has its own version of pip. For some reason your pythonpath is loading that one instead of the one that goes with py3.6.
Some possibilities to look into:
I don't know anything about redhat, but is there some redhat-specific way of choosing the "default python" to be used?
Is the shebang line at the top of the pip script something like #!/usr/bin/env python instead of #!/usr/bin/python3.6 like it should be?
Is it possible to modify your shell's PATH so that the downloaded python is used?
Is it possible to change your PYTHONPATH (i think it gets added to the default value of sys.path inside python; look it up) so that it loads the new pip instead of the old pip?

My OS was Mac sierra and I had to change the following line
from pip import main
into
from pip._internal import main

Seems the get pip script was missing the fact that more than 1 version of python could reside on a machine. So I added the following lines:
PY2 = sys.version_info[0] == 2
PY3 = sys.version_info[0] == 3
For some reason it was missing this. Anyway this worked for me. Thanks for your help guys.

Do the following steps to solve the problem --(Ubuntu-Debian)
step 1 - Go to directory
cd usr/bin/
and open pip3 file using gedit or nano(via terminal) .
Step 2- change from pip import main into from pip._internal import main
P.S - If you donot have permission to change use command - sudo chmod 777 pip3 and save this file.
Hope this helps!!

Eclipse with Python - having difficult with python version being picked up for egg file creation

I am using CentOS with Python 2.6 (/usr/bin/python2.6) but I installed Python 2.7.8 (/usr/local/lib/python2.7).
The egg files (on running a script on eclipse get created /usr/bin/python2.6/.. for the wrong version. I want it to get created in /usr/local/bin/python2.7/..
[code] [Desktop]$ which python
alias python='python2.7'
/usr/local/bin/python2.7 [/code]
The site-packages are present in /usr/local/lib/python2.7/site-packages
I have set the .bashrc file and PYTHONPATH to point to Python2.7 and checked output of "python -v" and "which python" which seems correct.
Is there something else that I could be missing? I always keep getting this error saying "no module named pkg_resources" found as a result of all this.
Thanks Lafada:
yum install python-setuptools
There was a problem importing one of the Python modules
required to run yum. The error leading to this problem was:
/usr/local/lib/python2.7/site-packages/cStringIO.so: undefined symbol: PyCapsule_New
Please install a package which provides this module, or
verify that the module is installed correctly.
It's possible that the above module doesn't match the
current version of Python, which is:
2.6.6 (r266:84292, Jan 22 2014, 09:42:36)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-4)]
If you cannot solve this problem yourself, please go to
the yum faq at:
http://yum.baseurl.org/wiki/Faq
This clearly explains that there is some version issue/mix-up.. would you know about this?
Update:
I found something on stackoverflow which helped me on 2 packages but not the others. I see the following on my Python Interpreters.
[code]
/usr/local/lib/python2.7/site-packages/setuptools-5.4.1-py2.7.egg
/usr/local/lib/python2.7/site-packages/pip-1.5.6-py2.7.egg
/usr/lib/python2.6/site-packages/nose-1.3.3-py2.6.egg
/usr/lib/python2.6/site-packages/six-1.3.0-py2.6.egg
/usr/local/bin/python2.7
/usr/local/lib/python2.7/site-packag`enter code here`es
/usr/lib64/python2.6
/usr/lib64/python2.6/plat-linux2
/usr/lib64/python2.6/lib-dynload
/usr/lib64/python2.6/site-packages
/usr/lib64/python2.6/site-packages/gtk-2.0
/usr/lib64/python2.6/site-packages/webkit-1.0
/usr/lib/python2.6/site-packages
/usr/lib/python2.6/site-packages/setuptools-0.6c11-py2.6.egg-info
[/code]
I need the packages referencing py2.6 to refer to py2.7 and create egg files for 2.7.

You have to install python-setuptools
apt-get install python-setuptools
This will install pkg_resources module
Hi Lafada:
I have responded to your comment by editing my question.

Doing an "make altinstall" helped me and following http://toomuchdata.com/2014/02/16/how-to-install-python-on-centos/ was helpful.
For those modules that were still using py2.6, I re-installed them with pip by using "pip-2.7".

Homebrew failing to install postgresql; python 64-bit errors

I'm getting errors when running
$ brew install postgresql
==> Downloading http://ftp.postgresql.org/pub/source/v9.1.2/postgresql-9.1.2.tar.bz2
File already downloaded in /Users/neil/Library/Caches/Homebrew
Warning: Detected a framework Python that does not have 64-bit support in:
/Library/Frameworks/Python.framework/Versions/Current/Python
e configure script seems to prefer this version of Python over any others,
you may experience linker problems as described in:
http://osdir.com/ml/pgsql-general/2009-09/msg00160.html
fix this issue, you may need to either delete the version of Python
own above, or move it out of the way before brewing PostgreSQL.
te that a framework Python in /Library/Frameworks/Python.framework is
e "MacPython" version, and not the system-provided version which is in:
/System/Library/Frameworks/Python.framework
==> ./configure --disable-debug --prefix=/usr/local/Cellar/postgresql/9.1.2 --datadir=/usr/local/Cellar/postgresql/9.1.2/shar
^C
Here's where python is located.
$ which python
/usr/local/bin/python
I modified my ~/.zshrc PATH from
export PATH=/Library/Frameworks/Python.framework/Versions/2.7/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/X11/bin
to
export PATH=/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/X11/bin
And although I'm getting python 64-bit errors, my version of python is 64-bit according to this SO post:
$ python -c 'import struct;print( 8 * struct.calcsize("P"))'
64

The problem pointed out in the referenced mailing list post is that the configure step isn't impacted by the PATH here. There's a whole other mechanism used to find things to link against; see Where do I set DYLD_LIBRARY_PATH on Mac OS X for a quick intro. You could try the suggested workaround given by the brew script--rename /Library/Frameworks/Python.framework/Versions/Current/Python to something else to get it out of the linker's search path, repeat the brew install, then put it back.

If you don't need Python bindings in your PostgreSQL, you can also just install it without Python bindings using brew install postgresql --no-python.

This command is installing the server, not the python bindings. Is that what you want? There is a installer for osx that will install the server for you.
Once you have done that, you can install the psycopg2 bindings directly from source.

Change default python version from 2.6.6 to 2.7 and also configure django

I am new to linux (Ubuntu) and python (Django). By default there is python 2.6.6 in my linux, I installed python 2.7. In the command prompt when I type python it goes to python 2.6.6, I want to change my default python to 2.7.

Ubuntu might have a Python2.7 package. If so, install that then use that to create a virtualenv and put Django inside that.

I recommend to use pythonbrew which can install and switch between multi Python interpreters in your $HOME without touch your system directories.
BTW, when install python, use the command
pythonbrew install --no-test 2.7.2
to skip unitest could speed up the installation a lot.

It's all about the links, I tell ya. Look at the links. Check the inode's link count for python2.5, python2.6, python2.7, python3.2, etc. Notice those are greater than one.
Just hunt down the duped link to "python", fix by unlink, and relink it. It may be a real link, or just a sym link. unlink with extreme prejudice.
-rwxr-xr-x 2 root admin 12392 Oct 4 2009 /opt/local/bin/python2.5*
-rwxr-xr-x 2 root wheel 12392 Jul 23 17:14 /opt/local/bin/python2.6*
lrwxr-xr-x 1 root wheel 72 Nov 7 2008 /usr/bin/python# -> ../../System/Library/Frameworks/Python.framework/Versions/2.5/bin/python
-rwxrwxr-x 1 root admin 41476 Jul 3 2010 /Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7*
-rwxr-xr-x 3 root wheel 2072216 Jul 27 19:34 /usr/local/bin/python3.2*

The easiest way would be to modify your path and make sure the path to Python 2.7 is before Python 2.6. This is what I have done on my Mac to achieve similar things.
EDIT
I agree with Noufal Ibrahim in the fact about using virtualenv. I would also suggest looking into virutalenv wrapper. However, you still might have trouble using Python 2.7 is your path is not configured correctly, using an Ubuntu package for the install should take care of the path for you. Otherwise to install virtualenv from the bash shell, you can do something along the lines.
$ path/to/python27/python easy_install virutalenv
$ pip install virtualenvwrapper
I believe when installing virtualenv, it will set your PATH for you. You can confirm this by doing:
$which python
This should now show Python 2.7.