Takes a newly created project, uploads a README.md, then sets it as the project's description. This uses the AzDO Python library.

azdevop_init.py

from azure.devops.connection import Connection
from azure.devops.v5_1.core import TeamProject
from azure.devops.v5_1.git import GitPush, GitRefUpdate, GitCommit
from msrest.authentication import BasicAuthentication
from msrest.universal_http import ClientRequest

# Authenticate
credentials = BasicAuthentication('', token)
connection = Connection(base_url=f'https://dev.azure.com/{org}', creds=credentials)

# Find the project (ex. 'My_Project')
core_client = self.clients.get_core_client()
projects = core_client.get_projects()
for p in projects.value:
    if p.name == 'My_Project':
        project = p

# Read README.md contents
fs = helpers.FileSystem()
content = fs.read_file('./README.md')

# Create the initial push/commit
git_client = self.clients.get_git_client()

repo = git_client.get_repositories(project.id)[0]
ref_update = GitRefUpdate(name="refs/heads/master", old_object_id="0000000000000000000000000000000000000000", repository_id=repo.id)
changes = [
    {
        "changeType": "add",
        "item": {
            "path": "/README.md"
        },
        "newContent": {
            "content": content,
            "contentType": "rawtext"
        }
    }
]
commit = GitCommit(comment="Initial commit.", changes=changes)
push = GitPush(commits=[commit], ref_updates=[ref_update], repository=repo)
git_client.create_push(push, repo.id)

# Manually set the project description to the README.md of the newly created project/repo
headers = {"content-type": "application/json; charset=utf-8'"}
client_request = ClientRequest("PATCH", f'https://dev.azure.com/{org}/_apis/Settings/project/{project.id}/Entries/host?api-version=5.1-preview.1')    # <----- Non-publicized URL
payload = { "VersionControl/ProjectOverview/DefaultRepository": repo.id }                       # <-----  NOTE: Changing this payload is how to change the description to a WIKI page
response = self.connection._client.send(request=client_request, headers=headers, content=payload)

return response