Docker can't find pip3, even though its installed

General
1

Docker can’t find pip3, even though its installed

 % which pip3                   
/usr/local/bin/pip3

% docker build --target test -t todobackend-test .
Sending build context to Docker daemon  372.7kB
...
Step 4/12 : RUN apk add --no-cache gcc python3 python3-dev libffi-dev musl-dev linux-headers mariadb-dev
 ---> Using cache
 ---> 7e64185b97f9
Step 5/12 : RUN pip3 install wheel
 ---> Running in 7aa68a2249b4
/bin/sh: pip3: not found
The command '/bin/sh -c pip3 install wheel' returned a non-zero code: 127

What is the easiest way to solve this?

2

Uhm, you did use which pip3 on your host, didn’t you? This is completly unrelated to what is in inside the image.

Add py3-pip to your apk add command.

1 Like
3

That worked, thank you.

I’m following an example from a book, which is obviously outdated.

4

Don’t worry, It just took me a couple of seconds to google for “apk add pip3” :wink:

You might want to take a llok at the excellent Introduction to Docker and Containers self-paced tutorial.

1 Like