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How to select specific filenames nested within several folders?

How to select specific filenames nested within several folders?

  • I have hundreds of shapefiles that are stored in separate folders, which are nested within several other folders. Among the shapefiles I only need the ones that are named 'POINT*.shp' How do I get these specific shapefiles so I can then add fields, calculate fields, etc.? If there is a better option than os.walk, please tell. I'm only beginning to learn python, so this is very new to me. Thanks!

  • Answer:

    Use os.walk and then loop through the files appending to a list, where the filename starts with 'point' and ends with '.shp'. import os path = "D:/Files/GIS/Datafiles/" shp_list = [] for dirpath, dirnames, files in os.walk(path): for f in files: if f.lower().endswith(".shp") and f.lower().startswith("point"): print f fullpath = os.path.join(dirpath, f) shp_list.append(fullpath)

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There is a similar question http://gis.stackexchange.com/questions/59350/how-to-list-feature-classes-of-multiple-geodatabase-in-multiple-folder, but this is only helpful if you have access to ArcMap 10.1 SP1. If so you could use the http://resources.arcgis.com/en/help/main/10.1/index.html#//018w00000023000000 to look for shapefiles. If you want any feature class with POINT in the name, you could do the following: import arcpy, os, fnmatch # Set the workspace with user input arcpy.env.workspace = "Your directory here" inWorkspace = arcpy.env.workspace pointList = [] for dirpath, dirnames, filenames in arcpy.da.Walk(inWorkspace, followlinks=True, datatype="FeatureClass"): for filename in filenames: # Add any field with "POINT" in the filename when creating list if fnmatch.fnmatch(filename, "*POINT*"): pointList.append(os.path.join(dirpath, filename)) This creates a list (pointList) of complete paths to shapefiles with "POINT" in the name within your specified directory. Alternatively you could include type="Point" in the arcpy.da.Walk() to search for only POINT feature classes.

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