How to create "Python Package Download" Azure DevOps Service Connection

You can use Endpoints - Create - REST API (Azure DevOps Service Endpoint) to create a service connection with "Python Package Download" type in Azure DevOps.

Here is an example of calling the REST API using PowerShell:

# Convert PAT to a Base64 string.
$pat = "{Personal Access Token}"
$base64AuthInfo = [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes(("{0}:{1}" -f "", $pat)))

# Set request headers.
$headers = New-Object "System.Collections.Generic.Dictionary[[String],[String]]"
$headers.Add("Authorization", ("Basic {0}" -f $base64AuthInfo))
$headers.Add("Content-Type", "application/json-patch+json")

$uri = "POST https://dev.azure.com/{organization}/_apis/serviceendpoint/endpoints?api-version=7.0"

# Set request body and convert it to JSON type.
$body = @(
    @{
  "name": "MyNewServiceConnectionName",
  "type": "PythonPackageDownload",
  "url": "https://myserver",
  "authorization": @{
    "parameters": @{
      "username": "myusername",
      "password": "mysecretpassword"
    },
    "scheme": "UsernamePassword"
  },
  "isShared": false,
  "isReady": true,
  "serviceEndpointProjectReferences": [
    @{
      "projectReference": @{
        "id": "ProjectId",
        "name": "ProjectName"
      },
      "name": "MyNewServiceConnectionName"
    }
  ]
}
    ) | ConvertTo-Json -Depth 100

# Execute Invoke-RestMethod cmdlet to call the API and convert it response to JSON for better readable.
Invoke-RestMethod -Method POST -Uri $uri -Headers $headers -Body $body | ConvertTo-Json -Depth 100