Arcgis10.5 python按属性分割图层,属性相同分为一个图层

# coding=utf-8
"""
Source code for potential gp tool to create outputs based on attributes
of an input.
""" import arcpy
import numbers
import sys try:
unicode
except:
unicode = str def get_unique_values(in_data, fields):
"""
Identify all unique values for field(s) in a data source :param in_data: Input data source
:param fields: Field name
:return: A list of unique values
""" # Respect extent environment where possible
if arcpy.env.extent:
lyr_name = 'sbyloc_extent'
try:
lyr = arcpy.MakeFeatureLayer_management(in_data, lyr_name)[0]
arcpy.SelectLayerByLocation_management(lyr, 'INTERSECT',
arcpy.env.extent.polygon)
in_data = lyr_name
except arcpy.ExecuteError:
pass table_name = arcpy.CreateUniqueName('freq', 'in_memory')
arcpy.Frequency_analysis(in_data, table_name, fields)
atts = [r for r in arcpy.da.SearchCursor(table_name, fields)] try:
arcpy.Delete_management(table_name)
except arcpy.ExecuteError:
# Should delete, but don't fail for intermediate data issues
pass return atts def create_name(workspace, name, extension):
"""
Create a unique name :param workspace: The workspace that an expected output will be written to
:param name: Base name of the output (list)
:param extension: Extension including the leading period
:return: A unique name, including pathname
""" name = u'_'.join([unicode(i) for i in name]) name = name.replace('"', '')
name = name.replace("'", "") if name == '': # name of '' validated to ''
name = 'T' validated_name = u'{}{}'.format(
arcpy.ValidateTableName(name, workspace),
extension) unique_name = arcpy.CreateUniqueName(validated_name, workspace) return unique_name def create_expression(in_data, field_name, value):
"""
Create a SQL Expression :param in_data: Input data source
:param field_name: The field name that will be queried
:param value: The value in the field that will be queried for
:return: SQL expression
""" delimited_field = arcpy.AddFieldDelimiters(in_data, field_name)
if isinstance(value, numbers.Number):
return u'{} = {}'.format(delimited_field, value)
elif isinstance(value, type(None)):
return u'{} IS NULL'.format(delimited_field)
else:
return u''' %s = '%s' ''' % ( delimited_field, value.replace("'", "'\'").replace('"', '\"') ) def select(datatype, *args):
"""
Data type non-specific Select tool handling :param datatype: arcpy.Describe datatype keyword
:param args: arguments for Select/TableSelect tools
:return:
""" feature_data = datatype in ['FeatureClass', 'FeatureLayer']
tool_name = 'Select' if feature_data else 'TableSelect'
eval('arcpy.analysis.{}'.format(tool_name))(*args) def split_by_atts(in_data, out_workspace, fields):
"""
Split a feature class include a series of feature classes based on
unique values in a field. :param in_data: The input data source
:param out_workspace: The output workspace that data will be written to
:param fields: Unique values in these fields will be used to split the data
:return: A list of output pathnames (output has been created)
""" try:
from itertools import izip
except ImportError:
izip = zip datatype = arcpy.Describe(in_data).datatype unique_values = get_unique_values(in_data, fields) workspace_type = arcpy.Describe(out_workspace).datatype # If output workspace is a folder add a .shp extension
extension = ''
if workspace_type == 'Folder':
extension = '.shp' arcpy.SetProgressor('STEP', '', 0, len(unique_values), 1) outputs = list()
for i in unique_values:
output = create_name(out_workspace, i, extension) expression = u' AND '.join([
create_expression(in_data, j[0], j[1])
for j
in izip(fields, i)]) select(datatype, in_data, output, expression)
values_string = u', '.join([unicode(v) for v in i]) arcpy.AddIDMessage('INFORMATIVE', 86245, values_string, output) outputs.append(output) arcpy.SetProgressorPosition() return outputs if __name__ == '__main__':
in_data = arcpy.GetParameterAsText(0)
out_workspace = arcpy.GetParameterAsText(1)
fields = [i.value for i in arcpy.GetParameter(2)] try:
split_by_atts(in_data, out_workspace, fields)
arcpy.SetParameterAsText(3, out_workspace)
except Exception as err:
arcpy.AddError(str(err))
sys.exit(1)
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