numpy 1.14.3 can't open libf77blas.so.3 on Raspberry Pi Zero W (arm6)

[s7711]

I'm using a Raspberry Pi Zero W and I am running Raspian Stretch Lite, released 2018-04-18, with update and dist-upgrade (on 17 May 2018). In python3 I've tried:

pip3 install numpy
which installed 1.14.3. When I import numpy in python3 it reports that it cannot file "libf77blas.so.3". numpy 1.12.1 works.

Didn't find any other comments on this, sorry if it is a duplicate.

[charris]

Where are you getting numpy in both the 1.14.3 and 1.12.1 cases?

[s7711]

Thanks for commenting! Good question, took me quite a while to figure it out... Looks like they are installed from:

https://www.piwheels.org/simple/numpy/numpy-1.12.1-cp35-cp35m-linux_armv6l.whl
https://www.piwheels.org/simple/numpy/numpy-1.14.3-cp35-cp35m-linux_armv6l.whl

Here are the logs from the pip3 install, in case I have interpreted the logs incorrectly:

numpy-1.12.1.txt
numpy-1.14.3.txt

These were generated in a new, clean virtual environment. I installed 1.12.1 first using:

pip3 install numpy==1.12.1 -v --log numpy-1.12.1.txt

That imports correctly into python3. Then I ran:

pip3 install numpy==1.14.3 -v --log numpy-1.14.3.txt

which has error:

libf77blas.so.3: cannot open shared object file: No such file or directory

[pv]

So it's some 3rd party wheels. To solve the issue with their wheels, you probably need to contact the piwheels people, whoever they are.

[s7711]

Thanks for getting back to me and sorry for troubling you. I'll see if I can alert them to the problem.

[hemangjoshi37a]

Chances are you are missing a dependency

sudo apt-get install libatlas-base-dev

Give that a shot and then run it again.

[mattip]

Closing. This is a downstream packaging issue, perhaps specific to @s7711

[LIII-XXII]

To other people getting this issue on raspi zero w: a solution is to install numpy via apt:

pip3 uninstall numpy #remove previously installed package
apt install python3-numpy

[industriousonesoft]

Chances are you are missing a dependency

sudo apt-get install libatlas-base-dev

Give that a shot and then run it again.

Thx, you saved my day!

[theeggdev]

Chances are you are missing a dependency

sudo apt-get install libatlas-base-dev

Give that a shot and then run it again.

it works for me too!
I am using raspberry pi 3.