Similar to the sh step, it would be useful to have a build step which can execute python code directly inside a pipeline.  I process the following addition to the durable-task-plugin.

Create a python pipeline command to run Python scripts directly.

Syntax:

node {

python """
     from datetime import datetime
     now = datetime.now() 
     print("CURRENT TIME: ", now)
 """
 }

The command should support two optional parameters:

1.  virtualenv: If set, this should prepend a directory to PATH:
   On Windows:

${virtualenv}/scripts

On POSIX (Linux, MacOS X, FreeBSD, etc.):

${virtualenv}/bin

1. executable: This value allows the user to specify the full path
   to the Python executable. This is equivalent to
   the Python sys.executable variable.
   If not set, the default value of this should be: "python".
   This would allow the user to use non-default python interpreters, such as /usr/local/bin/python3 or /opt/bin/pypy

Optionally, the Python script should run under setsid() on POSIX platforms, to make it easier to stop/kill  Python scripts started in Pipelines ( JENKINS-25503 ).