No documentation on how to trigger pipeline build on 'master' branch.

import os
from azure.devops.connection import Connection
from msrest.authentication import BasicAuthentication

Fill in with your personal access token and org URL

PERSONAL_ACCESS_TOKEN = os.getenv("PERSONAL_ACCESS_TOKEN")
ORGANIZATION_URL = 'xxxxxx'
PROJECT_NAME = "xxxxxx"

def create_pipeline_client():
# Get connection from devOps & create pipeline client
credentials = BasicAuthentication('', PERSONAL_ACCESS_TOKEN)
connection = Connection(base_url=ORGANIZATION_URL, creds=credentials)
pipeline_client = pipeline_client = connection.clients_v5_1.get_pipelines_client()
return pipeline_client

def build_pipeline():
pipeline_client = create_pipeline_client()
run_params = {'sourceBranch' : "master"}
pipe_id = 2098
pipeline_client.run_pipeline(
run_parameters=run_params,
project=PROJECT_NAME,
pipeline_id=pipe_id,
pipeline_version=None)
print("Pipeline run successfully activated.")

build_pipeline()

Comece pelo exemplo em Python do issue e localize o ponto de entrada da documentação existente no repositório. Documente como acionar um build de pipeline para a branch master, usando o fluxo de Azure DevOps API mostrado; a documentação deve explicar a configuração necessária e a execução resultante do pipeline.