Teradata Package for Python Function Reference | 20.00 - num_points - Teradata Package for Python - Look here for syntax, methods and examples for the functions included in the Teradata Package for Python.
Teradata® Package for Python Function Reference - 20.00
- Deployment
- VantageCloud
- VantageCore
- Edition
- Enterprise
- IntelliFlex
- VMware
- Product
- Teradata Package for Python
- Release Number
- 20.00.00.02
- Published
- September 2024
- Language
- English (United States)
- Last Update
- 2024-10-17
- dita:id
- TeradataPython_FxRef_Enterprise_2000
- Product Category
- Teradata Vantage
- teradataml.geospatial.geodataframecolumn.GeoDataFrameColumn.num_points = num_points(self)
- DESCRIPTION:
Returns the number of points in a Geometry type that represents an
ST_LineString or GeoSequence value.
PARAMETERS:
None
SUPPORTED GEOMETRY TYPES:
ST_LineString and GeoSequence
RAISES:
TypeError, ValueError, TeradataMlException
RETURNS:
GeoDataFrameColumn
EXAMPLES:
from teradataml import GeoDataFrame, load_example_data
from teradataml import Point, LineString, Polygon, GeometryCollection
# Load example data.
load_example_data("geodataframe", "sample_shapes")
# Create a GeoDataFrame.
geodf = GeoDataFrame("sample_shapes")
print(geodf)
# Example 1: Get the number of points in a geometry in column 'linestrings'.
# Let's select only few columns from GeoDataFrame and rows containing ST_Linestrings geometries only.
lines = geodf.select(["skey", "linestrings"])[geodf.linestrings.geom_type == "ST_Linestring"]
lines.assign(res = lines.linestrings.num_points())