Using ArcPy in Python class

Question

I am using ArcMap 10.7.

I am trying to create a tool that creates dimension lines but I am getting error.

Runtime error 
Traceback (most recent call last):
 File "<string>", line 1, in <module>
 File "<string>", line 218, in main
 File "D:\Projects\AutoWellGIS\Python\DimensionClass.py", line 76, in ReturnFirstPoint
 offsetGeom = Polyline(rArray,sr,False,False)
NameError: global name 'arcpy' is not defined

I am importing arcpy and I also tried to extend the arcpy class by passing it to the class like this.

from arcpy.da import SearchCursor
from arcpy import PointGeometry
from arcpy import Polyline
from arcpy import Point
from arcpy import Array
import math
from math import sqrt
import arcpy
class Dimension(SearchCursor,PointGeometry,Polyline,Point,Array): 
 def __init__(self):
 self.sr = None
 self.insertfields = []
 self.where = None
def ReturnFirstPoint(self,lyr,where):
 sref = self.sr
 fields = ["SHAPE@"]
 with SearchCursor(lyr.name,fields,where_clause=where,spatial_reference=sref) as sc:
 firstPoint = [row[0].firstPoint for row in sc][0]
 return firstPoint

I tried to look at the Python addin but I do not see how they are implementing arcpy in class structure.

I made a test class and try to implement one class from arcgisscripting and I am now getting error:

Traceback (most recent call last):
 File "d:/Projects/AutoWellGIS/Python/testclass.py", line 13, in <module>
 test = TestArcpy()
 File "d:/Projects/AutoWellGIS/Python/testclass.py", line 8, in __init__
 da.SearchCursor.__init__(self,in_table,field_names)
RuntimeError: cannot open 'D:\Projects\AutoWellGIS\Projects1911022円.gdb\LEASE_ROAD'

Here is the test class I create, I am thinking this is not possible, for me, to extend the arcpy classes. It is looking like too much trouble.

from arcgisscripting import da
class TestArcpy(da.SearchCursor):
 def __init__(self):
 field_names=["NAME","OBJECTID"]
 in_table=r"D:\Projects\AutoWellGIS\Projects1911022円.gdb\LEASE_ROAD"
 da.SearchCursor.__init__(self,in_table,field_names)
 
test = TestArcpy()

• Vince: It you're getting an error on line one, you don't really need to provide any more code than that. ArcPy is only available in Python deployments where it has been installed. Where is your Python installed?
• Vince: The Desktop installation doesn't matter, but the Python install is forbidden from having spaces in the name.

Answer 1

I finally had success, here is the code maybe helpful to someone else. I got the code to import the da module from the da.py in the arcpy folder in ArcMap install directory.

import arcpy
__all__=[item for item in dir(arcpy) if not item.startswith('_')]
locals().update(arcpy.__dict__)
class TestArcpy():
 def __init__(self):
 with arcpy.da.SearchCursor(r"D:\Projects\AutoWellGIS\Projects1911022円.gdb\LEASE_ROAD",["OBJECTID","NAME"]) as sc:
 for row in sc:
 print(row)
 # field_names=["NAME","OBJECTID"]
 # in_table=r"D:\Projects\AutoWellGIS\Projects1911022円.gdb\LEASE_ROAD"
 # da.SearchCursor.__init__(self,in_table,field_names)
test = TestArcpy()