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""" | |
First, this was written back when I wrote Python a bit more like C - I know it needs some work! But for setting delimiters, | |
you can do the following: | |
my_dataset = data_file(r"path_to_data") | |
my_dataset.delim_open # gives you the opening delimeter | |
my_dataset.delim_close # gives you the closing delimeter | |
""" | |
import logging | |
delims_open = {'mdb': "[", "sqlite": "\"", 'gdb': "\"", 'shp': "\"", 'in_memory': ""} # a dictionary of field delimiters for use in sql statements. | |
delims_close = {'mdb': "]", "sqlite": "\"", 'gdb': "\"", 'shp': "\"", 'in_memory': ""} # in one type of field or another. These two are just extension based lookups | |
processing_log = logging.getLogger("processing_log") | |
class geospatial_object: | |
def setup_object(self): | |
'''like __init__ but won't be overridden by subclasses''' | |
if 'setup_run' in self.__dict__: # check if we have this key in a safe way | |
if self.setup_run is True: # have we already run this function | |
return # don't run it again | |
self.setup_run = True | |
self.gdb = None | |
self.temp_folder = None | |
self.temp_gdb = None | |
def check_temp(self): | |
self.setup_object() | |
if not self.temp_folder or not self.temp_gdb: | |
try: | |
self.temp_folder = tempfile.mkdtemp() | |
temp_gdb = os.path.join(self.temp_folder,"join_temp.gdb") | |
if arcpy.Exists(temp_gdb): | |
self.temp_gdb = temp_gdb | |
else: # doesn't exist | |
if 'log' in sys.modules: | |
processing_log.info("Creating %s" % temp_gdb) | |
arcpy.CreateFileGDB_management(self.temp_folder,"join_temp.gdb") | |
self.temp_gdb = temp_gdb | |
except: | |
return False | |
return True | |
def get_temp_folder(self): | |
self.setup_object() | |
if self.check_temp(): | |
return self.temp_folder | |
else: | |
raise IOError("Couldn't create temp folder") | |
def get_temp_gdb(self): | |
self.setup_object() | |
if self.check_temp(): | |
return self.temp_gdb | |
else: | |
raise IOError("Couldn't create temp gdb or folder") | |
class data_file(geospatial_object): | |
def __init__(self,filename = None): | |
self.data_location = filename | |
self.delim_open = None | |
self.delim_close = None | |
def set_delimiters(self): | |
processing_log.info("Setting delimiters",) | |
try: | |
fc_info = arcpy.ParseTableName(self.data_location) | |
database, owner, featureclass = fc_info.split(",") | |
except: | |
processing_log.error("Failed to assess data format") | |
return False | |
processing_log.info("Type from ParseTableName = %s" % featureclass) | |
if re.match(" mdb",featureclass) is not None or re.search("\.mdb",featureclass) is not None: | |
self.delim_open = delims_open['mdb'] | |
self.delim_close = delims_close['mdb'] | |
elif re.match(" gdb",featureclass) is not None or re.search("\.gdb",featureclass) is not None: | |
self.delim_open = delims_open['gdb'] | |
self.delim_close = delims_close['gdb'] | |
elif re.match(" shp",featureclass) is not None or re.search("\.shp",featureclass) is not None: | |
self.delim_open = delims_open['shp'] | |
self.delim_close = delims_close['shp'] | |
elif re.match(" sqlite", featureclass) is not None or re.search("\.db", featureclass) is not None or re.search("\.sqlite", featureclass) is not None: | |
self.delim_open = delims_open['sqlite'] | |
self.delim_close = delims_close['sqlite'] | |
elif re.match(" in_memory",featureclass) is not None or re.search("in_memory",featureclass) is not None: # dbmses use no delimeters. This is just a guess at how to detect if an fc is in one since I don't have access yet. | |
self.delim_open = delims_open['in_memory'] | |
self.delim_close = delims_close['in_memory'] | |
elif re.match(" sde",featureclass) is not None: # dbmses use no delimeters. This is just a guess at how to detect if an fc is in one since I don't have access yet. | |
self.delim_open = "" | |
self.delim_close = "" | |
else: | |
processing_log.warning("No field delimiters for this type of data. We can select features in gdbs, mdbs, shps, in_memory, and possibly sde files (untested)") | |
return False | |
return True |
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