Shape types are represented by numbers between 0 and 31 as defined by the shapefile specification and listed below. A shapefile is a container for a specific type of geometry, and this can be checked using the shapeType attribute. ![]() Shapefiles have a number of attributes for inspecting the file contents. If it's available PyShp will use the shx file to access shape records a little faster but will do just fine without it. The shx file is a very simple fixed-record index for the variable-length records in the shp file. Notice in the examples above the shx file is never used. > r = shapefile.Reader(shp=myshp, dbf=mydbf) > mydbf = open("shapefiles/blockgroups.dbf", "rb") > myshp = open("shapefiles/blockgroups.shp", "rb") This feature is very powerful and allows you to load shapefiles from a url, a zip file, a serialized object, or in some cases a database. You can also load shapefiles from any Python file-like object using keyword arguments to specify any of the three files. Reading Shapefiles from File-Like Objects The "Reader" class can be used as a context manager, to ensure open file objects are properly closed when done reading the data: > with shapefile.Reader("shapefiles/blockgroups.shp") as shp: Reading Shapefiles Using the Context Manager The library does not care about file extensions. OR any of the other 5+ formats which are potentially part of a shapefile. OR > sf = shapefile.Reader("shapefiles/blockgroups.dbf") ![]() OR > sf = shapefile.Reader("shapefiles/blockgroups.shp") ![]() You specify the base filename of the shapefile or the complete filename of any of the shapefile component files. The shapefile format is actually a collection of three files. To read a shapefile create a new "Reader" object and pass it the name of an existing shapefile. Census Bureau Blockgroups data set near San Francisco, CA and available in the git repository of the PyShp GitHub site. The examples below will use a shapefile created from the U.S. 注意:安装命令: pip install pyshp,使用: import shapefileīefore doing anything you must import the library.
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