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im trying to use face_recognition but i keep getting an error from importing it [duplicate]

I am trying to run an Arducam MT9J001 camera on a raspberry pi 3b+. I am getting the following error when I try to run the program, "ImportError: libcblas.so3: cannot open shared object file: No such file or directory." I have the computer vision software downloaded onto the raspberry pi, though it seems that it is still not working. I'm not sure what other information is viable to this project, but if there is something else I should be specifying please let me know.

What worked for me (I was missing some dependencies):
pip3 install opencv-python
sudo apt-get install libcblas-dev
sudo apt-get install libhdf5-dev
sudo apt-get install libhdf5-serial-dev
sudo apt-get install libatlas-base-dev
sudo apt-get install libjasper-dev
sudo apt-get install libqtgui4
sudo apt-get install libqt4-test

You need to install only one package with neccessary shared object for it to work
sudo apt-get install libatlas-base-dev

Exact same solution as #thvs86 but here's a single 1 line copy-paste so you don't have to insert each command individually:
pip3 install opencv-contrib-python; sudo apt-get install -y libatlas-base-dev libhdf5-dev libhdf5-serial-dev libatlas-base-dev libjasper-dev libqtgui4 libqt4-test

Install PCL Library on Python/Ubuntu 18.04 LTS

How do you install PCL Library on Python/Ubuntu 18.04 LTS?
I've tried different ways to do so, without luck.
Trying to import pcl results in:
ImportError: libpcl_keypoints.so.1.7: cannot open shared object file: No such file or directory

Install it as a system-wide library, versus a Python module.
sudo add-apt-repository ppa:sweptlaser/python3-pcl
sudo apt update
sudo apt install python3-pcl
from here

I tried much to solve this issue. The drawback is here:
sudo apt-get install libpcl-dev -y
If you run this, it will install libpcl-dev with a higher version which will be conflicted with that libpcl-dev 1.7 you will install later. Here are some steps to raise the issue:
initially add Ubuntu 16 source list
then run below lines one by one.
sudo apt-get update
pip install python-pcl
sudo apt-get install libpcl-keypoints1.7
sudo apt-get install libpcl-outofcore1.7
sudo apt-get install libpcl-people1.7
sudo apt-get install libpcl-recognition1.7
sudo apt-get install libpcl-registration1.7
sudo apt-get install libpcl-segmentation1.7
sudo apt-get install libpcl-surface1.7
Now, if you get error "libpng12-0", do this:
sudo add-apt-repository ppa:linuxuprising/libpng12
sudo apt update
sudo apt-get install libpng12-0
sudo apt-get install libpcl-tracking1.7
sudo apt-get install libflann1.8
sudo apt-get install libpcl-visualization1.7
finally,
python
>>> import pcl
Congratulation : PCL is successfully imported

pyconfig.h missing during "pip install cryptography"

I wanna set up scrapy cluster follow this link scrapy-cluster,Everything is ok before I run this command:
pip install -r requirements.txt
The requirements.txt looks like:
cffi==1.2.1
characteristic==14.3.0
ConcurrentLogHandler>=0.9.1
cryptography==0.9.1
...
I guess the above command means to install packages in requirements.txt.But I don't want it to specify the version,So I change it to this:
cat requirements.txt | while read line; do pip install ${line%%[>=]*} --user;done
When install cryptography,it gives me the error:
build/temp.linux-x86_64-2.7/_openssl.c:12:24:fatal error:pyconfig.h:No such file or directory
#include <pyconfig.h>
I don't know how to solved this , I have tried a lot of methods ,but failed. my system is centos 7, and the version of python is 2.7.5(default).
Besides, Is there any other scrapy frame which is appliable for a large number of urls . Thanks in advance

For Ubuntu, python2
apt-get install python-dev
For Ubuntu, python3
apt-get install python3-dev

I have solved it by myself. for the default python of centos, there is only a file named pyconfg-64.h in usr/include/python2.7/,So run the command
yum install python-devel
Then it works.

for python3.6,
apt-get install python3.6-dev
and
apt-get install libssl-dev libffi-dev

i use python 2 on ubuntu and got the same problem when installing cryptography.
after i run this command
apt-get install python-dev libssl-dev libffi-dev
then it works.

For Python 3.7 on Debian, the following works for me.
apt-get install python3.7-dev
and
apt-get install libssl-dev
You may also need:
apt-get install libffi-dev

On a Debian based distro (AntiX distro), together with apt-get install python3-dev, I also installed rust, to complete successfully the pip3 install cryptography command. So, I gave:
$ sudo apt-get install build-essential curl python3-dev libssl-dev libffi-dev
$ sudo curl https://sh.rustup.rs -sSf | sh
When prompted (Figure 1), type 1 and hit Enter on your keyboard.
Once it completes, you have to give following commands:
$ source $HOME/.cargo/env
$ source ~/.profile
$ pip3 install cryptography

How to prepare Ubuntu 14.04 for installing Django

I came across a tutorial which lists a number of libraries to install before installing Django (I am using Ubuntu 14.04, Python3, and Django 1.8):
$ sudo apt-get update
$ sudo apt-get -y upgrade
$ sudo apt-get install -y build-essential
$ sudo apt-get install python-setuptools python-dev python3.4-dev python-software-properties libpq-dev
$ sudo apt-get install libtiff4-dev libjpeg8-dev zlib1g-dev libfreetype6-dev liblcms2-dev libwebp-dev tcl8.5-dev tk8.5-dev
$ sudo apt-get build-dep python-imaging
But other tutorials may not list so many libraries to install. I wonder which are absolutely necessary, and others may be omitted?

You only need to install these dependencies if you want image processing via pillow and if you plan on installing it via pip (the Python package manager) rather than apt-get (Ubuntu's package manager).
Since you're using a virtualenv, you will need to install this package from source. The following commands will get the build dependencies and install pillow using pip.
$ sudo apt-get build-dep python3-imaging
$ pip install pillow
Note that pillow is a beast to compile. Be prepared to wait several minutes.

I just installed a Ubuntu Hardy server. In Python, I tried to import _mysql and MySQLdb

But, they were unable to be found!?
How do I install both of them?

Have you installed python-mysqldb? If not install it using apt-get install python-mysqldb. And how are you importing mysql.Is it import MySQLdb? Python is case sensitive.

This should do the trick.
sudo apt-get install mysql-server
sudo apt-get install python-mysqldb

I believe this should make it work:
sudo apt-get install python-mysqldb