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SearchCursor directory and subdirectories using python

Question asked by yaron148 on May 17, 2015
Branched to a new discussion

I work with arcmap 10.3 and python 2.7.8. I have more than 500 shapefiles located in many folders and subFolders. All Sub Folders are located in one large directory. I try with arcpy to detect all  shapefiles that have in their attribute table ,in field name "YEUD", the value 20. I search all shape files that begin with letters "mig". Finally i tried to print all the shapefiles that had been found with value 20 in it.

When i run this code i get en error:


import arcpy,os,sys,string,fnmatch
import arcpy.mapping
from arcpy import env

rootPath = r"C:\Project\layers"
pattern = 'mig*.shp'
fields = arcpy.ListFields(rootPath)
for root, dirs, files in os.walk(rootPath):
    for filename in fnmatch.filter(files, pattern):
        print( os.path.join(root, filename))
        for field in fields:
            with arcpy.da.SearchCursor(rootPath, as rows:
                for row in rows:
                    if == 'YEUD':
                        if row == '20':
                             print( os.path.join(root, filename))


RuntimeError: ERROR 999999: Error executing function.

I can't understand why it doesn't work ?