no module named zlib
Question:
First, please bear with me. I have hard time telling others my problem and this is a long thread…
I am using pythonbrew to run multiple versions of python in Ubuntu 10.10.
For installing pythonbrew and how it works, please refers to this link below
After reading a couple stackoverflow threads, I finally found the file called Setup under this directory: ~/.pythonbrew/pythons/Python-2.7.1/lib/python2.7/config
In this Setup file I see
# Andrew Kuchling's zlib module.
# This require zlib 1.1.3 (or later).
# See http://www.gzip.org/zlib/
# zlib zlibmodule.c -I$(prefix)/include -L$(exec_prefix)/lib -lz
I uncommented the last line, then I ran python -v again. However, I received the same error when I tried import zlib, so I guess I have to do something to install zlib into the lib.
But I am clueless about what I need to do. Can someone please direct me in the right direction??? Thank you very much!
I am doing this because I want to use different version of python in different virtualenv I created.
When I did virtualenv -p python2.7 I received no module named zlib.
jwxie518@jwxie518-P5E-VM-DO:~$ virtualenv -p python2.7 --no-site-packages testenv
Running virtualenv with interpreter /home/jwxie518/.pythonbrew/pythons/Python-2.7.1/bin/python2.7
Traceback (most recent call last):
File "/usr/local/lib/python2.6/dist-packages/virtualenv.py", line 17, in <module>
import zlib
ImportError: No module named zlib
EDIT
I have to install 2.7.1 by appending –force.
I am developing Django, and I need some of these missing modules, for example sqlite3, and to create my virtualenv I definitely need zlib. If I just use the system default (2.6.6), I have no problem.
To do this with system default, all I need to do is
virtualenv --no-site-packages testenv
Thanks!
(2nd edit)
I installed 3.2 also and I tested it without problem, so I guess my problem comes down to how to install the missing module(s).
jwxie518@jwxie518-P5E-VM-DO:~$ virtualenv -p python3.2 testenv
Running virtualenv with interpreter /home/jwxie518/.pythonbrew/pythons/Python-3.2/bin/python3.2
New python executable in testenv/bin/python3.2
Also creating executable in testenv/bin/python
Installing distribute..................................................................................................................................................................................................................................................................................................................................done.
Installing pip...............done.
jwxie518@jwxie518-P5E-VM-DO:~$ virtualenv -p python3.2 --no-site-packages testenv
Running virtualenv with interpreter /home/jwxie518/.pythonbrew/pythons/Python-3.2/bin/python3.2
New python executable in testenv/bin/python3.2
Also creating executable in testenv/bin/python
Installing distribute..................................................................................................................................................................................................................................................................................................................................done.
Installing pip...............done.
Answers:
Sounds like you need to install the devel package for zlib, probably want to do something like
# ubuntu 12,14,16,18,20.04+
sudo apt-get install zlib1g-dev
Instead of using python-brew you might want to consider just compiling by hand, it’s not very hard. Just download the source, and configure, make, make install. You’ll want to at least set --prefix to somewhere, so it’ll get installed where you want.
./configure --prefix=/opt/python2.7 + other options
make
make install
You can check what configuration options are available with ./configure --help and see what your system python was compiled with by doing:
python -c "import sysconfig; print sysconfig.get_config_var('CONFIG_ARGS')"
The key is to make sure you have the development packages installed for your system, so that Python will be able to build the zlib, sqlite3, etc modules. The python docs cover the build process in more detail: http://docs.python.org/using/unix.html#building-python.
By default when you configuring Python source, zlib module is disabled, so you can enable it using option –with-zlib when you configure it. So it becomes
./configure --with-zlib
For the case I met, I found there are missing modules after make. So I did the following:
- install zlib-devel
- make and install python again.
After you install the missing zlib dev package you can also use pythonbrew to uninstall and then reinstall the version of python you wanted and it seems like it picks up the new package to compile to correct abilities. This way you can keep using pythonbrew and don’t have to do the compilation yourself (though it isn’t that difficult)
After running configure, you can change the config option in the file Modules/Setup as below:
zlib zlibmodule.c -I$(prefix)/include -L$(exec_prefix)/lib -lz
Or you can uncomment the zlib line as-is.
My objective was to create a new Django project from the command line in Ubuntu, like so:
django-admin.py startproject mysite
I have python2.7.5 installed. I got this error:
ImportError: No module named zlib
For hours I could not find a solution, until now!
Here is a link to the solution –
http://doc.biblissima-condorcet.fr/loris-setup-guide-ubuntu-debian
I followed and executed instruction in Section 1.1 and it is working perfectly! It is an easy solution.
The easiest solution I found, is given on python.org devguide:
sudo apt-get build-dep python3.6
If that package is not available for your system, try reducing the minor version until you find a package that is available in your system’s package manager.
I tried explaining details, on my blog.
I had a lot of problems making a virtual environment (venv) as described in the tensorflow installation guide.
Most of the commands listed in this post didn’t help me either so, if this is also your case this is what I did:
pip3 install --user pipenv pip install virtualenv
Installs the dependencies to create a virtual environment
mkdir myenv
Makes a new directory called myenv but you can call it whatever you want e.g. mynewenv
cd myenv
Or whatever you call your directory so: cd [your_directory_name]
virtualenv -p /usr/bin/python3 venv
Creates a virtual environment called venv in the folder myenv. You can call your virtual env whatever you like e.g. vitualenv [v_env_name]
source ./venv/bin/activate
Activates the virtual environment. Note that if you choose a different v. env. name your commands should be written as such source ./[v_env_name]/bin/activate
deactivate
Deactivates the virtual environment.
Note: I am using Python 3.6.6 & Ubuntu 18.04
Similar to the answers here on CentOS or RHEL run
sudo yum install zlib-devel
The –with-zlib solutions shown here seem to be missing headers that Python 3.9 and up needs to link (in my case).
First, please bear with me. I have hard time telling others my problem and this is a long thread…
I am using pythonbrew to run multiple versions of python in Ubuntu 10.10.
For installing pythonbrew and how it works, please refers to this link below
After reading a couple stackoverflow threads, I finally found the file called Setup under this directory: ~/.pythonbrew/pythons/Python-2.7.1/lib/python2.7/config
In this Setup file I see
# Andrew Kuchling's zlib module.
# This require zlib 1.1.3 (or later).
# See http://www.gzip.org/zlib/
# zlib zlibmodule.c -I$(prefix)/include -L$(exec_prefix)/lib -lz
I uncommented the last line, then I ran python -v again. However, I received the same error when I tried import zlib, so I guess I have to do something to install zlib into the lib.
But I am clueless about what I need to do. Can someone please direct me in the right direction??? Thank you very much!
I am doing this because I want to use different version of python in different virtualenv I created.
When I did virtualenv -p python2.7 I received no module named zlib.
jwxie518@jwxie518-P5E-VM-DO:~$ virtualenv -p python2.7 --no-site-packages testenv
Running virtualenv with interpreter /home/jwxie518/.pythonbrew/pythons/Python-2.7.1/bin/python2.7
Traceback (most recent call last):
File "/usr/local/lib/python2.6/dist-packages/virtualenv.py", line 17, in <module>
import zlib
ImportError: No module named zlib
EDIT
I have to install 2.7.1 by appending –force.
I am developing Django, and I need some of these missing modules, for example sqlite3, and to create my virtualenv I definitely need zlib. If I just use the system default (2.6.6), I have no problem.
To do this with system default, all I need to do is
virtualenv --no-site-packages testenv
Thanks!
(2nd edit)
I installed 3.2 also and I tested it without problem, so I guess my problem comes down to how to install the missing module(s).
jwxie518@jwxie518-P5E-VM-DO:~$ virtualenv -p python3.2 testenv
Running virtualenv with interpreter /home/jwxie518/.pythonbrew/pythons/Python-3.2/bin/python3.2
New python executable in testenv/bin/python3.2
Also creating executable in testenv/bin/python
Installing distribute..................................................................................................................................................................................................................................................................................................................................done.
Installing pip...............done.
jwxie518@jwxie518-P5E-VM-DO:~$ virtualenv -p python3.2 --no-site-packages testenv
Running virtualenv with interpreter /home/jwxie518/.pythonbrew/pythons/Python-3.2/bin/python3.2
New python executable in testenv/bin/python3.2
Also creating executable in testenv/bin/python
Installing distribute..................................................................................................................................................................................................................................................................................................................................done.
Installing pip...............done.
Sounds like you need to install the devel package for zlib, probably want to do something like
# ubuntu 12,14,16,18,20.04+
sudo apt-get install zlib1g-dev
Instead of using python-brew you might want to consider just compiling by hand, it’s not very hard. Just download the source, and configure, make, make install. You’ll want to at least set --prefix to somewhere, so it’ll get installed where you want.
./configure --prefix=/opt/python2.7 + other options
make
make install
You can check what configuration options are available with ./configure --help and see what your system python was compiled with by doing:
python -c "import sysconfig; print sysconfig.get_config_var('CONFIG_ARGS')"
The key is to make sure you have the development packages installed for your system, so that Python will be able to build the zlib, sqlite3, etc modules. The python docs cover the build process in more detail: http://docs.python.org/using/unix.html#building-python.
By default when you configuring Python source, zlib module is disabled, so you can enable it using option –with-zlib when you configure it. So it becomes
./configure --with-zlib
For the case I met, I found there are missing modules after make. So I did the following:
- install zlib-devel
- make and install python again.
After you install the missing zlib dev package you can also use pythonbrew to uninstall and then reinstall the version of python you wanted and it seems like it picks up the new package to compile to correct abilities. This way you can keep using pythonbrew and don’t have to do the compilation yourself (though it isn’t that difficult)
After running configure, you can change the config option in the file Modules/Setup as below:
zlib zlibmodule.c -I$(prefix)/include -L$(exec_prefix)/lib -lz
Or you can uncomment the zlib line as-is.
My objective was to create a new Django project from the command line in Ubuntu, like so:
django-admin.py startproject mysite
I have python2.7.5 installed. I got this error:
ImportError: No module named zlib
For hours I could not find a solution, until now!
Here is a link to the solution –
http://doc.biblissima-condorcet.fr/loris-setup-guide-ubuntu-debian
I followed and executed instruction in Section 1.1 and it is working perfectly! It is an easy solution.
The easiest solution I found, is given on python.org devguide:
sudo apt-get build-dep python3.6
If that package is not available for your system, try reducing the minor version until you find a package that is available in your system’s package manager.
I tried explaining details, on my blog.
I had a lot of problems making a virtual environment (venv) as described in the tensorflow installation guide.
Most of the commands listed in this post didn’t help me either so, if this is also your case this is what I did:
pip3 install --user pipenvpip install virtualenv
Installs the dependencies to create a virtual environment
mkdir myenv
Makes a new directory called myenv but you can call it whatever you want e.g. mynewenv
cd myenv
Or whatever you call your directory so: cd [your_directory_name]
virtualenv -p /usr/bin/python3 venv
Creates a virtual environment called venv in the folder myenv. You can call your virtual env whatever you like e.g. vitualenv [v_env_name]
source ./venv/bin/activate
Activates the virtual environment. Note that if you choose a different v. env. name your commands should be written as such source ./[v_env_name]/bin/activate
deactivate
Deactivates the virtual environment.
Note: I am using Python 3.6.6 & Ubuntu 18.04
Similar to the answers here on CentOS or RHEL run
sudo yum install zlib-devel
The –with-zlib solutions shown here seem to be missing headers that Python 3.9 and up needs to link (in my case).