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Getting and editing list of strings from file geodatabase


Transforming file geodatabase feature classes from custom local coordinate system?Renaming shapefiles with prefix while running arcpy.FeatureClassToGeodatabase?Copying ArcSDE geodatabase to file geodatabase using ArcPy?Listing all feature datasets and classes from multiple geodatabase into CSV file?List File Geodatabase TopologyConverting multiple File geodatabase (.gdb) into multiple Personal geodatabase (.mdb)Create FeatureDataSet in geodatabase with Arcpy from a tableGetting full path of empty sde feature datasets (Children property from arcpy.Describe object won't work))Creating python dictionary that maps each domain to multiple coded values in File Geodatabase?Using arcpy.da.Walk to go through many file geodatabases






.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;








3















I have a file GDB that contains Annotation and Polygon feature classes. I would like to create a list of strings with the first part of the name of the polygon features. For example in the data below I would like to create a list that would appear like the following -



['Canal', 'CanalAreas']



Data Example



I have used ListFeatureClasses in order to get a list of all the polygon classes, but I'm a lot a loss of what the next step is, - a LEN() style function to move the last 6 characters? 



lookfor = []
for dataset in arcpy.ListDatasets():
 for fc in arcpy.ListFeatureClasses("*", "Polygon", dataset):
 lookfor.append(fc)

for fc in arcpy.ListFeatureClasses("*", "Polygon"):
 lookfor.append(fc)


I currently have this list hard coded in another script and would like to make it more dynamic so I don't have to worry about data changes etc. Any advice or help would be greatly appreciated.






arcpy arcgis-10.1 file-geodatabase







share|improve this question

















  • 1





    Do you want the part before the first underscore? fcBase = fc.split('_')[0] then if fcBase not in lookfor: lookfor.append(fcBase) - probably best to cast fc = fc.lower() first though to avoid multiple items with slightly different case (CanalAreas is not the same as canalareas). Also consider using arcpy.da.Walk resources.arcgis.com/en/help/main/10.2/018w/… then you won't have to loop for all standalone then all feature classes in feature datasets.

    – Michael Stimson
    1 hour ago


















3















I have a file GDB that contains Annotation and Polygon feature classes. I would like to create a list of strings with the first part of the name of the polygon features. For example in the data below I would like to create a list that would appear like the following -



['Canal', 'CanalAreas']



Data Example



I have used ListFeatureClasses in order to get a list of all the polygon classes, but I'm a lot a loss of what the next step is, - a LEN() style function to move the last 6 characters? 



lookfor = []
for dataset in arcpy.ListDatasets():
 for fc in arcpy.ListFeatureClasses("*", "Polygon", dataset):
 lookfor.append(fc)

for fc in arcpy.ListFeatureClasses("*", "Polygon"):
 lookfor.append(fc)


I currently have this list hard coded in another script and would like to make it more dynamic so I don't have to worry about data changes etc. Any advice or help would be greatly appreciated.






arcpy arcgis-10.1 file-geodatabase







share|improve this question

















  • 1





    Do you want the part before the first underscore? fcBase = fc.split('_')[0] then if fcBase not in lookfor: lookfor.append(fcBase) - probably best to cast fc = fc.lower() first though to avoid multiple items with slightly different case (CanalAreas is not the same as canalareas). Also consider using arcpy.da.Walk resources.arcgis.com/en/help/main/10.2/018w/… then you won't have to loop for all standalone then all feature classes in feature datasets.

    – Michael Stimson
    1 hour ago














3












3








3








I have a file GDB that contains Annotation and Polygon feature classes. I would like to create a list of strings with the first part of the name of the polygon features. For example in the data below I would like to create a list that would appear like the following -



['Canal', 'CanalAreas']



Data Example



I have used ListFeatureClasses in order to get a list of all the polygon classes, but I'm a lot a loss of what the next step is, - a LEN() style function to move the last 6 characters? 



lookfor = []
for dataset in arcpy.ListDatasets():
 for fc in arcpy.ListFeatureClasses("*", "Polygon", dataset):
 lookfor.append(fc)

for fc in arcpy.ListFeatureClasses("*", "Polygon"):
 lookfor.append(fc)


I currently have this list hard coded in another script and would like to make it more dynamic so I don't have to worry about data changes etc. Any advice or help would be greatly appreciated.






arcpy arcgis-10.1 file-geodatabase







share|improve this question














I have a file GDB that contains Annotation and Polygon feature classes. I would like to create a list of strings with the first part of the name of the polygon features. For example in the data below I would like to create a list that would appear like the following -



['Canal', 'CanalAreas']



Data Example



I have used ListFeatureClasses in order to get a list of all the polygon classes, but I'm a lot a loss of what the next step is, - a LEN() style function to move the last 6 characters? 



lookfor = []
for dataset in arcpy.ListDatasets():
 for fc in arcpy.ListFeatureClasses("*", "Polygon", dataset):
 lookfor.append(fc)

for fc in arcpy.ListFeatureClasses("*", "Polygon"):
 lookfor.append(fc)


I currently have this list hard coded in another script and would like to make it more dynamic so I don't have to worry about data changes etc. Any advice or help would be greatly appreciated.






arcpy arcgis-10.1 file-geodatabase




arcpy arcgis-10.1 file-geodatabase






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked 1 hour ago









occystrapoccystrap

353




353







  • 1





    Do you want the part before the first underscore? fcBase = fc.split('_')[0] then if fcBase not in lookfor: lookfor.append(fcBase) - probably best to cast fc = fc.lower() first though to avoid multiple items with slightly different case (CanalAreas is not the same as canalareas). Also consider using arcpy.da.Walk resources.arcgis.com/en/help/main/10.2/018w/… then you won't have to loop for all standalone then all feature classes in feature datasets.

    – Michael Stimson
    1 hour ago













  • 1





    Do you want the part before the first underscore? fcBase = fc.split('_')[0] then if fcBase not in lookfor: lookfor.append(fcBase) - probably best to cast fc = fc.lower() first though to avoid multiple items with slightly different case (CanalAreas is not the same as canalareas). Also consider using arcpy.da.Walk resources.arcgis.com/en/help/main/10.2/018w/… then you won't have to loop for all standalone then all feature classes in feature datasets.

    – Michael Stimson
    1 hour ago








1




1





Do you want the part before the first underscore? fcBase = fc.split('_')[0] then if fcBase not in lookfor: lookfor.append(fcBase) - probably best to cast fc = fc.lower() first though to avoid multiple items with slightly different case (CanalAreas is not the same as canalareas). Also consider using arcpy.da.Walk resources.arcgis.com/en/help/main/10.2/018w/… then you won't have to loop for all standalone then all feature classes in feature datasets.

– Michael Stimson
1 hour ago






Do you want the part before the first underscore? fcBase = fc.split('_')[0] then if fcBase not in lookfor: lookfor.append(fcBase) - probably best to cast fc = fc.lower() first though to avoid multiple items with slightly different case (CanalAreas is not the same as canalareas). Also consider using arcpy.da.Walk resources.arcgis.com/en/help/main/10.2/018w/… then you won't have to loop for all standalone then all feature classes in feature datasets.

– Michael Stimson
1 hour ago











1 Answer
1






active

oldest

votes


















2














If you always want the part before first underscore then split at this and fetch first item (index 0) in split list. Set will remove duplicates.



import arcpy
arcpy.env.workspace = r'C:Default.gdb'
polygons = list(set([fc.split('_')[0] for fc in arcpy.ListFeatureClasses(feature_type='POLYGON')]))


You can also use re module to split at first non-letter charachter:



import re
polygons = list(set([re.split('[^a-zA-Z]',fc)[0] for fc in arcpy.ListFeatureClasses(feature_type='POLYGON')]))





share|improve this answer




















  • 2





    Thanks Bera, this looks great. Upon using the code I noticed the first underscore was not always the right one, so I made a small adjustment like so - polygons = list(set([fc[:-6] for fc in arcpy.ListFeatureClasses(feature_type='POLYGON')]))

    – occystrap
    27 mins ago











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1 Answer
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1 Answer
1






active

oldest

votes









active

oldest

votes






active

oldest

votes









2














If you always want the part before first underscore then split at this and fetch first item (index 0) in split list. Set will remove duplicates.



import arcpy
arcpy.env.workspace = r'C:Default.gdb'
polygons = list(set([fc.split('_')[0] for fc in arcpy.ListFeatureClasses(feature_type='POLYGON')]))


You can also use re module to split at first non-letter charachter:



import re
polygons = list(set([re.split('[^a-zA-Z]',fc)[0] for fc in arcpy.ListFeatureClasses(feature_type='POLYGON')]))





share|improve this answer




















  • 2





    Thanks Bera, this looks great. Upon using the code I noticed the first underscore was not always the right one, so I made a small adjustment like so - polygons = list(set([fc[:-6] for fc in arcpy.ListFeatureClasses(feature_type='POLYGON')]))

    – occystrap
    27 mins ago















2














If you always want the part before first underscore then split at this and fetch first item (index 0) in split list. Set will remove duplicates.



import arcpy
arcpy.env.workspace = r'C:Default.gdb'
polygons = list(set([fc.split('_')[0] for fc in arcpy.ListFeatureClasses(feature_type='POLYGON')]))


You can also use re module to split at first non-letter charachter:



import re
polygons = list(set([re.split('[^a-zA-Z]',fc)[0] for fc in arcpy.ListFeatureClasses(feature_type='POLYGON')]))





share|improve this answer




















  • 2





    Thanks Bera, this looks great. Upon using the code I noticed the first underscore was not always the right one, so I made a small adjustment like so - polygons = list(set([fc[:-6] for fc in arcpy.ListFeatureClasses(feature_type='POLYGON')]))

    – occystrap
    27 mins ago













2












2








2







If you always want the part before first underscore then split at this and fetch first item (index 0) in split list. Set will remove duplicates.



import arcpy
arcpy.env.workspace = r'C:Default.gdb'
polygons = list(set([fc.split('_')[0] for fc in arcpy.ListFeatureClasses(feature_type='POLYGON')]))


You can also use re module to split at first non-letter charachter:



import re
polygons = list(set([re.split('[^a-zA-Z]',fc)[0] for fc in arcpy.ListFeatureClasses(feature_type='POLYGON')]))





share|improve this answer















If you always want the part before first underscore then split at this and fetch first item (index 0) in split list. Set will remove duplicates.



import arcpy
arcpy.env.workspace = r'C:Default.gdb'
polygons = list(set([fc.split('_')[0] for fc in arcpy.ListFeatureClasses(feature_type='POLYGON')]))


You can also use re module to split at first non-letter charachter:



import re
polygons = list(set([re.split('[^a-zA-Z]',fc)[0] for fc in arcpy.ListFeatureClasses(feature_type='POLYGON')]))






share|improve this answer














share|improve this answer



share|improve this answer








edited 37 mins ago

























answered 42 mins ago









BERABERA

18.2k62145




18.2k62145







  • 2





    Thanks Bera, this looks great. Upon using the code I noticed the first underscore was not always the right one, so I made a small adjustment like so - polygons = list(set([fc[:-6] for fc in arcpy.ListFeatureClasses(feature_type='POLYGON')]))

    – occystrap
    27 mins ago












  • 2





    Thanks Bera, this looks great. Upon using the code I noticed the first underscore was not always the right one, so I made a small adjustment like so - polygons = list(set([fc[:-6] for fc in arcpy.ListFeatureClasses(feature_type='POLYGON')]))

    – occystrap
    27 mins ago







2




2





Thanks Bera, this looks great. Upon using the code I noticed the first underscore was not always the right one, so I made a small adjustment like so - polygons = list(set([fc[:-6] for fc in arcpy.ListFeatureClasses(feature_type='POLYGON')]))

– occystrap
27 mins ago





Thanks Bera, this looks great. Upon using the code I noticed the first underscore was not always the right one, so I made a small adjustment like so - polygons = list(set([fc[:-6] for fc in arcpy.ListFeatureClasses(feature_type='POLYGON')]))

– occystrap
27 mins ago

















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