Opening file geodatabase in python

Question

I'm new to python and this is my script:

import arcpy,sys
input=sys.argv[1]
field=sys.argv[2]
try:
    cursor=arcpy.da.SearchCursor(input,field)
    getvalue=[row.getValue(field) for row in cursor]
    values=set(getvalue)
    print values
    del cursor
except:
    del cursor

When its trying to run cursor, the following error appeared:

Traceback (most recent call last):
  File "C:\Users\Erfan\Desktop\Script2.py", line 6, in <module>
    cursor=arcpy.da.SearchCursor(input,field)
RuntimeError: cannot open 'D:\gis\data\network'

By the way, I want to access a feature class inside a feature dataset in gdb.

Answer 1

Your argument 1 path should be something like this to reference a gdb feature dataset feature class (as a python string):

'D:/gis/data/network/test.gdb/myFeatureDataset/myFC' # also back slashes will error out interpreted as line returns by python, use forward slashes instead

And as @GISGe commented, getValue() method is for the older cursor type, use row[0] instead (for first field in field variable list or row[1] for second field in field variable list). See examples here, Search Cursor.