# I try to create line using coordinate but it show these error AttributeError: 'type' object has no attribute 'CreateBound'

**URL:** <https://forum.dynamobim.com/t/i-try-to-create-line-using-coordinate-but-it-show-these-error-attributeerror-type-object-has-no-attribute-createbound/57294>\
**Category:** Developers\
**Tags:** revit, python, dynamo\
**Created:** [November 16, 2020, 10:57am UTC](https://forum.dynamobim.com/t/i-try-to-create-line-using-coordinate-but-it-show-these-error-attributeerror-type-object-has-no-attribute-createbound/57294 "2020-11-16T10:57:05Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![somphon](https://avatars.discourse-cdn.com/v4/letter/s/a698b9/32.png) [@somphon](https://forum.dynamobim.com/u/somphon)\
**Post date:** [November 16, 2020, 10:57am UTC](https://forum.dynamobim.com/t/i-try-to-create-line-using-coordinate-but-it-show-these-error-attributeerror-type-object-has-no-attribute-createbound/57294/1 "2020-11-16T10:57:05Z")

</div>

These is code I used to get coordinate

```
# Load the Python Standard and DesignScript Libraries
# Import Common Language Runtime
import clr
# Import Revit Services
clr.AddReference("RevitServices")
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager

clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *

clr.AddReference('RevitAPIUI')
from Autodesk.Revit.UI import *

clr.AddReference("RevitNodes")
import Revit
clr.ImportExtensions(Revit.Elements)
clr.ImportExtensions(Revit.GeometryConversion)

clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *

import System
from System.Collections.Generic import *

#get the document
doc = DocumentManager.Instance.CurrentDBDocument

#Function
def line(number1, number2, number3, number4, number5, number6, number7):
    x1 = number1
    y1 = number2
    z1 = number3
    x2 = number4
    y2 = number5
    z2 = number6
    nx1 = number1 + number7
    count = 0
    while (count < 2):
	    pt1 = XYZ(x1, y1, z1)
	    pt2 = XYZ(x2, y2, z2)
	    pt3 = XYZ(nx1, y1, z1)
	    pt4 = XYZ(nx1, y2, z2)
	    y1 = y1 + number7
	    y2 = y2 + number7
	    count = count + 1
	    mylist.append(pt1)
	    mylist.append(pt2)
	    mylist.append(pt3)
	    mylist.append(pt4)
	
num1 = IN[0]
num2 = IN[1]
num3 = IN[2]
num4 = IN[3]
num5 = IN[4]
num6 = IN[5]
num7 = IN[6]

mylist = []

result = line(num1, num2, num3, num4, num5, num6, num7)

OUT = mylist

```

Which I successfully build loop creation of pt but when I try to add create line into these loop function to looping create line but it shown error AttributeError: ‘type’ object has no attribute ‘CreateBound’. However, I have been searching for command used to create line by coordinate even RevitAPIdoc give me these scripts

```
Line1 = Line.CreateBound(pt1, pt2);

```

So I try to insert these line of code into my while loop as follow

```
# Load the Python Standard and DesignScript Libraries
# Import Common Language Runtime
import clr
# Import Revit Services
clr.AddReference("RevitServices")
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager

clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *

clr.AddReference('RevitAPIUI')
from Autodesk.Revit.UI import *

clr.AddReference("RevitNodes")
import Revit
clr.ImportExtensions(Revit.Elements)
clr.ImportExtensions(Revit.GeometryConversion)

clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *

import System
from System.Collections.Generic import *

#get the document
doc = DocumentManager.Instance.CurrentDBDocument

#Function
def line(number1, number2, number3, number4, number5, number6, number7):
    x1 = number1
    y1 = number2
    z1 = number3
    x2 = number4
    y2 = number5
    z2 = number6
    nx1 = number1 + number7
    count = 0
    while (count < 2):
	    pt1 = XYZ(x1, y1, z1)
	    pt2 = XYZ(x2, y2, z2)
	    pt3 = XYZ(nx1, y1, z1)
	    pt4 = XYZ(nx1, y2, z2)
                line1 = Line.CreateBound(pt1, pt2)
                line2 = Line.CreateBound(pt3, pt4)
	    y1 = y1 + number7
	    y2 = y2 + number7
	    count = count + 1
	    mylist.append(pt1)
	    mylist.append(pt2)
	    mylist.append(pt3)
	    mylist.append(pt4)
	
num1 = IN[0]
num2 = IN[1]
num3 = IN[2]
num4 = IN[3]
num5 = IN[4]
num6 = IN[5]
num7 = IN[6]

mylist = []

result = line(num1, num2, num3, num4, num5, num6, num7)

OUT = mylist

```

My target is to repeat create 2 line for each time while loop looping but it keep notice me of these error AttributeError: ‘type’ object has no attribute ‘CreateBound’. Did I forgot to import some function?

---

<div class="post-metadata">

**Author:** ![c.poupin](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/c.poupin/32/89152_2.png) [@c.poupin](https://forum.dynamobim.com/u/c.poupin)\
**Post date:** [November 16, 2020, 11:37am UTC](https://forum.dynamobim.com/t/i-try-to-create-line-using-coordinate-but-it-show-these-error-attributeerror-type-object-has-no-attribute-createbound/57294/2 "2020-11-16T11:37:20Z")

</div>

Hello @somphon  
you have a conflict between 2 namespaces (Revit API , and Dynamo Proto API)

remove this if you don’t use it

```
clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import * 

```

or use an alias

```
clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *
import Autodesk.Revit.DB as DB
#.... // ...

Line1 = DB.Line.CreateBound(pt1, pt2)
```

---

<div class="post-metadata">

**Author:** ![somphon](https://avatars.discourse-cdn.com/v4/letter/s/a698b9/32.png) [@somphon](https://forum.dynamobim.com/u/somphon)\
**Post date:** [November 16, 2020, 1:03pm UTC](https://forum.dynamobim.com/t/i-try-to-create-line-using-coordinate-but-it-show-these-error-attributeerror-type-object-has-no-attribute-createbound/57294/3 "2020-11-16T13:03:51Z")

</div>

Thank you for reply I really appreciate and I have a bit curiosity because I tried ur suggestion and it successfully run without any error but instead I didnt saw graphical line drawing on my dynamo screen these is my code after I made an adjustment about namespace conflict.

```
# Load the Python Standard and DesignScript Libraries
# Import Common Language Runtime
import clr
# Import Revit Services
clr.AddReference("RevitServices")
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager

clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *
import Autodesk.Revit.DB as DB

clr.AddReference('RevitAPIUI')
from Autodesk.Revit.UI import *

clr.AddReference("RevitNodes")
import Revit
clr.ImportExtensions(Revit.Elements)
clr.ImportExtensions(Revit.GeometryConversion)

import System
from System.Collections.Generic import *

#get the document
doc = DocumentManager.Instance.CurrentDBDocument

#Function
def line(number1, number2, number3, number4, number5, number6, number7):
    x1 = number1
    y1 = number2
    z1 = number3
    x2 = number4
    y2 = number5
    z2 = number6
    nx1 = number1 + number7
    count = 0
    while (count < 2):
	    pt1 = XYZ(x1, y1, z1)
	    pt2 = XYZ(x2, y2, z2)
	    pt3 = XYZ(nx1, y1, z1)
	    pt4 = XYZ(nx1, y2, z2)
	    line1 = DB.Line.CreateBound(pt1, pt2)
	    line2 = DB.Line.CreateBound(pt3, pt4)
	    y1 = y1 + number7
	    y2 = y2 + number7
	    count = count + 1
	
num1 = IN[0]
num2 = IN[1]
num3 = IN[2]
num4 = IN[3]
num5 = IN[4]
num6 = IN[5]
num7 = IN[6]

mylist = []

result = line(num1, num2, num3, num4, num5, num6, num7)

OUT = line

```

It turn out that result said IronPython.Runtime.Pythonfunction. I have no idea what is mean. Im actually plan is to used this curve to later create rebar by curve.

---

<div class="post-metadata">

**Author:** ![c.poupin](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/c.poupin/32/89152_2.png) [@c.poupin](https://forum.dynamobim.com/u/c.poupin)\
**Post date:** [November 16, 2020, 6:02pm UTC](https://forum.dynamobim.com/t/i-try-to-create-line-using-coordinate-but-it-show-these-error-attributeerror-type-object-has-no-attribute-createbound/57294/4 "2020-11-16T18:02:18Z")

</div>

@somphon  
a few comments

- your function return null, you need to use the **“return”** keyword to return a result (instead of using global variable)
- Try to avoid not reassigning multiple variable names for the same reference
- To convert Revit geometry to Dynamo geometry, you will find very useful information here [https://github.com/DynamoDS/Dynamo/wiki/Python-0.6.3-to-0.7.x-Migration](https://github.com/DynamoDS/Dynamo/wiki/Python-0.6.3-to-0.7.x-Migration)

an example with your code

```
import sys
import clr
clr.AddReference('ProtoGeometry')
from Autodesk.DesignScript.Geometry import *
# Import Revit Services
clr.AddReference("RevitServices")
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager

clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *
import Autodesk.Revit.DB as DB

clr.AddReference('RevitAPIUI')
from Autodesk.Revit.UI import *

clr.AddReference("RevitNodes")
import Revit
clr.ImportExtensions(Revit.Elements)
clr.ImportExtensions(Revit.GeometryConversion)

import System
from System.Collections.Generic import *

#get the document
doc = DocumentManager.Instance.CurrentDBDocument

#Function
def line(x1, y1, z1, x2, y2, z2, increment):
	outLine = []
	nx1 = x1 + increment
	count = 0
	while (count < 2):
		pt1 = XYZ(x1, y1, z1)
		pt2 = XYZ(x2, y2, z2)
		pt3 = XYZ(nx1, y1, z1)
		pt4 = XYZ(nx1, y2, z2)
		line1 = DB.Line.CreateBound(pt1, pt2)
		outLine.append(line1)
		line2 = DB.Line.CreateBound(pt3, pt4)
		outLine.append(line2)
		y1 = y1 + increment
		y2 = y2 + increment
		count = count + 1
	return outLine   
	
NumX1 = IN[0]
NumY1 = IN[1]
NumZ1 = IN[2]
NumX2 = IN[3]
NumY2 = IN[4]
NumZ2 = IN[5]
increment = IN[6]

result = line(NumX1, NumY1, NumZ1, NumX2, NumY2, NumZ2, increment)

OUT = [x.ToProtoType() for x in result]
```