Metadata naming the token is required and the API docs need to be updated to reflect this.
You want something like this:
body = swagger_client.IssueTokenRequest(
    issue_address = "TUfp4Ss95xaKQPNGpbiZDsMPe4NR16CDiL",
    amount = 10000, 
    divisibility = 0,
    fee = 1000030000, 
    reissuable = False,
    metadata = swagger_client.IssueTokenRequestMetadata(
        token_name = "TEST",
        issuer = "Me",
        description = "My test token"
    )   
)