Writing the shapefile to the CARTO account requires only a CartoContext object, a file path, and the usual URL and API key combination. With GeoPandas now installed, the MLB Stadiums shapefile can be loaded into a GeoPandas DataFrame, and then written to the CARTO account using the CartoContext write method:

import geopandas as gdp
import cartoframes
APIKEY = "{API KEY}"
cc = cartoframes.CartoContext(base_url='https://{username}.carto.com/',
                              api_key=APIKEY)
shp = r"C:\Data\Stadiums_MLB\Stadiums_MLB.shp"
data = gdp.read_file(shp)
cc.write(data,"stadiums_mlb")

Log in to the CARTO account to confirm that the dataset has been added.