diff --git a/programming/python/api-reference/candidate-quad-edges-unit.md b/programming/python/api-reference/candidate-quad-edges-unit.md
new file mode 100644
index 0000000..3e63de0
--- /dev/null
+++ b/programming/python/api-reference/candidate-quad-edges-unit.md
@@ -0,0 +1,137 @@
+---
+layout: default-layout
+title: CandidateQuadEdgesUnit Class
+description: This page shows CandidateQuadEdgesUnit class definition of Dynamsoft Document Normalizer SDK Python Edition.
+keywords: get_count, get_candidate_quad_edge, CandidateQuadEdgesUnit, api reference
+---
+
+# CandidateQuadEdgesUnit Class
+
+The `CandidateQuadEdgesUnit` class represents an intermediate result unit whose type is candidate quad edges.
+
+## Definition
+
+*Module:* dynamsoft_document_normalizer
+
+```python
+class CandidateQuadEdgesUnit(IntermediateResultUnit)
+```
+
+*Inheritance:* [IntermediateResultUnit]({{ site.dcv_python_api }}core/intermediate-results/intermediate-result-unit.html) -> CandidateQuadEdgesUnit
+
+## Methods
+
+| Method | Description |
+|--------|-------------|
+| [`get_count`](#get_count) | Gets the count of `CandidateQuadEdge` objects in current object.|
+| [`get_candidate_quad_edge`](#get_candidate_quad_edge) | Gets a `CandidateQuadEdge` object from current object by specifying a index. |
+| [`remove_all_candidate_quad_edges`](#remove_all_candidate_quad_edges) | Removes all the candidate quad edges in current object. |
+| [`remove_candidate_quad_edge`](#remove_candidate_quad_edge) | Removes a candidate quad edge from current object by specifying an index. |
+| [`add_candidate_quad_edge`](#add_candidate_quad_edge) | Adds a candidate quad edge to current object. |
+| [`set_candidate_quad_edge`](#set_candidate_quad_edge) | Sets the candidate quad edge at the specified index. |
+
+### get_count
+
+Gets the count of `CandidateQuadEdge` objects in current object.
+
+```python
+def get_count(self) -> int:
+```
+
+**Return Value**
+
+The count of `CandidateQuadEdge` objects in current object.
+
+### get_candidate_quad_edge
+
+Gets a `CandidateQuadEdge` object from current object by specifying a index.
+
+```python
+def get_candidate_quad_edge(self, index: int) -> Tuple[int, Edge]:
+```
+
+**Parameters**
+
+`index` The index of the `CandidateQuadEdge` object.
+
+**Return Value**
+
+Returns a tuple containing following elements:
+- `error_code` <*int*>: The error code indicating the status of the operation.
+- `edge` <*Edge*>: The `CandidateQuadEdge` object got by the specific index.
+
+**See Also**
+
+[ErrorCode]({{ site.dcv_enumerations }}core/error-code.html?lang=python)
+
+[Edge]({{ site.dcv_python_api }}core/basic-classes/edge.html)
+
+### remove_all_candidate_quad_edges
+
+Removes all the candidate quad edges in current object.
+
+```python
+def remove_all_candidate_quad_edges(self) -> None:
+```
+
+### remove_candidate_quad_edge
+
+Removes a candidate quad edge from current object by specifying an index.
+
+```python
+def remove_candidate_quad_edge(self, index: int) -> int:
+```
+
+**Parameters**
+
+`index` The index of the candidate quad edge to be removed. 
+
+**Return Value**
+
+Returns 0 if successful, otherwise returns a negative value.
+
+### add_candidate_quad_edge
+
+Adds a candidate quad edge to current object.
+
+```python
+def add_candidate_quad_edge(self, edge: Edge, matrix_to_original_image: List[float] = IDENTITY_MATRIX) -> int:
+```
+
+**Parameters**
+
+`edge` The candidate quad edge to be added.
+
+`matrix_to_original_image` The matrix to the original image.
+
+**Return Value**
+
+Returns 0 if successful, otherwise returns a negative value.
+
+**See Also**
+
+[Edge]({{ site.dcv_python_api }}core/basic-classes/edge.html)
+
+### set_candidate_quad_edge
+
+Sets the candidate quad edge at the specified index.
+
+```python
+def set_candidate_quad_edge(self, index: int, edge: Edge, matrix_to_original_image: List[float] = IDENTITY_MATRIX) -> int:
+```
+
+**Parameters**
+
+`index` The index of the candidate quad edge to be set.
+
+`edge` The candidate quad edge to be added.
+
+`matrix_to_original_image` The matrix to the original image.
+
+**Return Value**
+
+Returns 0 if successful, otherwise returns a negative value.
+
+**See Also**
+
+[Edge]({{ site.dcv_python_api }}core/basic-classes/edge.html)
diff --git a/programming/python/api-reference/corners-unit.md b/programming/python/api-reference/corners-unit.md
new file mode 100644
index 0000000..91f4ffd
--- /dev/null
+++ b/programming/python/api-reference/corners-unit.md
@@ -0,0 +1,138 @@
+---
+layout: default-layout
+title: CornersUnit Class
+description: This page shows CornersUnit class definition of Dynamsoft Document Normalizer SDK Python Edition.
+keywords: get_count, get_corner, CornersUnit, api reference
+---
+
+# CornersUnit Class
+
+The `CornersUnit` class represents an intermediate result unit whose type is corners.
+
+## Definition
+
+*Module:* dynamsoft_document_normalizer
+
+```python
+class CornersUnit(IntermediateResultUnit)
+```
+
+*Inheritance:* [IntermediateResultUnit]({{ site.dcv_python_api }}core/intermediate-results/intermediate-result-unit.html) -> CornersUnit
+
+## Methods
+
+| Method | Description |
+|--------|-------------|
+| [`get_count`](#get_count) | Gets the count of `Corner` objects in current object.|
+| [`get_corner`](#get_corner) | Gets a `Corner` object from current object by specifying a index. |
+| [`remove_all_corners`](#remove_all_corners) | Removes all the corners in current object. |
+| [`remove_corner`](#remove_corner) | Removes a corner from current object by specifying an index. |
+| [`add_corner`](#add_corner) | Adds a corner to current object. |
+| [`set_corner`](#set_corner) | Sets the corner at the specified index. |
+
+### get_count
+
+Gets the count of `Corner` objects in current object.
+
+```python
+def get_count(self) -> int:
+```
+
+**Return Value**
+
+The count of `Corner` objects in current object.
+
+### get_corner
+
+Gets a `Corner` object from current object by specifying a index.
+
+```python
+def get_corner(self, index: int) -> Tuple[int, Corner]:
+```
+
+**Parameters**
+
+`index` The index of the `Corner` object.
+
+**Return Value**
+
+Returns a tuple containing following elements:
+- `error_code` <*int*>: The error code indicating the status of the operation.
+- `corner` <*Corner*>: The `Corner` object got by the specific index.
+
+**See Also**
+
+[ErrorCode]({{ site.dcv_enumerations }}core/error-code.html?lang=python)
+
+[Corner]({{ site.dcv_python_api }}core/basic-classes/corner.html)
+
+### remove_all_corners
+
+Removes all the corners in current object.
+
+```python
+def remove_all_corners(self) -> None:
+```
+
+### remove_corner
+
+Removes a corner from current object by specifying an index.
+
+```python
+def remove_corner(self, index: int) -> int:
+```
+
+**Parameters**
+
+`index` The index of the corner to be removed.
+
+**Return Value**
+
+Returns 0 if successful, otherwise returns a negative value.
+
+### add_corner
+
+Adds a corner to current object.
+
+```python
+def add_corner(self, corner: Corner, matrix_to_original_image: List[float] = IDENTITY_MATRIX) -> int:
+```
+
+**Parameters**
+
+`corner` The corner to be added.
+
+`matrix_to_original_image` The matrix to the original image.
+
+**Return Value**
+
+Returns 0 if successful, otherwise returns a negative value.
+
+**See Also**
+
+[Corner]({{ site.dcv_python_api }}core/basic-classes/corner.html)
+
+### set_corner
+
+Sets the corner at the specified index.
+
+```python
+def set_corner(self, index: int, corner: Corner, matrix_to_original_image: List[float] = IDENTITY_MATRIX) -> int:
+```
+
+**Parameters**
+
+`index` The index of the corner to be set.
+
+`corner` The corner to be added.
+
+`matrix_to_original_image` The matrix to the original image.
+
+**Return Value**
+
+Returns 0 if successful, otherwise returns a negative value.
+
+**See Also**
+
+[Corner]({{ site.dcv_python_api }}core/basic-classes/corner.html)
+
diff --git a/programming/python/api-reference/detected-quad-element.md b/programming/python/api-reference/detected-quad-element.md
new file mode 100644
index 0000000..5481dee
--- /dev/null
+++ b/programming/python/api-reference/detected-quad-element.md
@@ -0,0 +1,47 @@
+---
+layout: default-layout
+title: DetectedQuadElement Class
+description: This page shows DetectedQuadElement class definition of Dynamsoft Document Normalizer SDK Python Edition.
+keywords: get_confidence_as_document_boundary, DetectedQuadElement, api reference
+---
+
+# DetectedQuadElement Class
+
+The `DetectedQuadElement` class stores an intermediate result whose type is detected quad.
+
+## Definition
+
+*Module:* dynamsoft_document_normalizer
+
+```python
+class DetectedQuadElement(RegionObjectElement)
+```
+
+*Inheritance:* [RegionObjectElement]({{ site.dcv_python_api }}core/intermediate-results/region-object-element.html) -> DetectedQuadElement
+
+## Methods
+
+| Method | Description |
+|--------|-------------|
+| [`__init__`](#__init__) | Initializes a new instance of the `DetectedQuadElement` class. |
+| [`get_confidence_as_document_boundary`](#get_confidence_as_document_boundary) | Gets the confidence as document boundary of current object. |
+
+### \_\_init\_\_
+
+Initializes a new instance of the `DetectedQuadElement` class.
+
+```python
+def __init__(self, *args, **kwargs):
+```
+
+### get_confidence_as_document_boundary
+
+Gets the confidence as document boundary of current object.
+
+```python
+def get_confidence_as_document_boundary(self) -> int:
+```
+
+**Return Value**
+
+The confidence as document boundary of current object.
diff --git a/programming/python/api-reference/detected-quads-result.md b/programming/python/api-reference/detected-quads-result.md
index 94c9f3a..59fd2fa 100644
--- a/programming/python/api-reference/detected-quads-result.md
+++ b/programming/python/api-reference/detected-quads-result.md
@@ -14,7 +14,7 @@ The `DetectedQuadsResult` class stores a captured result whose type is detected
 *Module:* dynamsoft_document_normalizer
 
 ```python
-class DetectedQuadsResult(object)
+class DetectedQuadsResult
 ```
 
 ## Methods
diff --git a/programming/python/api-reference/detected-quads-unit.md b/programming/python/api-reference/detected-quads-unit.md
new file mode 100644
index 0000000..ca01413
--- /dev/null
+++ b/programming/python/api-reference/detected-quads-unit.md
@@ -0,0 +1,134 @@
+---
+layout: default-layout
+title: DetectedQuadsUnit Class
+description: This page shows DetectedQuadsUnit class definition of Dynamsoft Document Normalizer SDK Python Edition.
+keywords: get_count, get_detected_quad, DetectedQuadsUnit, api reference
+---
+
+# DetectedQuadsUnit Class
+
+The `DetectedQuadsUnit` class represents an intermediate result unit whose type is detected quads.
+
+## Definition
+
+*Module:* dynamsoft_document_normalizer
+
+```python
+class DetectedQuadsUnit(IntermediateResultUnit)
+```
+
+*Inheritance:* [IntermediateResultUnit]({{ site.dcv_python_api }}core/intermediate-results/intermediate-result-unit.html) -> DetectedQuadsUnit
+
+## Methods
+
+| Method | Description |
+|--------|-------------|
+| [`get_count`](#get_count) | Gets the count of `DetectedQuadElement` objects in current object.|
+| [`get_detected_quad`](#get_detected_quad) | Gets a `DetectedQuadElement` object from current object by specifying a index. |
+| [`operator[]`](#operator) | Gets a `DetectedQuadElement` object from current object by specifying a index.|
+| [`remove_all_detected_quads`](#remove_all_detected_quads) | Removes all the detected quads in current object. |
+| [`remove_detected_quad`](#remove_detected_quad) | Removes a detected quad from current object by specifying an index. |
+| [`add_detected_quad`](#add_detected_quad) | Adds a detected quad to current object. |
+| [`set_detected_quad`](#set_detected_quad) | Sets the detected quad at the specified index. |
+
+### get_count
+
+Gets the count of `DetectedQuadElement` objects in current object.
+
+```python
+def get_count(self) -> int:
+```
+
+**Return Value**
+
+The count of `DetectedQuadElement` objects in current object.
+
+### get_detected_quad
+
+Gets a `DetectedQuadElement` object from current object by specifying a index.
+
+```python
+def get_detected_quad(self, index: int) -> DetectedQuadElement:
+```
+
+**Parameters**
+
+`index` The index of the `DetectedQuadElement` object.
+
+**Return Value**
+
+Returns the `DetectedQuadElement` object got by the specific index.
+
+**See Also**
+
+[DetectedQuadElement]({{ site.ddn_python_api }}detected-quad-element.html)
+
+### remove_all_detected_quads
+
+Removes all the DetectedQuads in current object.
+
+```python
+def remove_all_detected_quads(self) -> None:
+```
+
+### remove_detected_quad
+
+Removes a detected quad from current object by specifying an index.
+
+```python
+def remove_detected_quad(self, index: int) -> int:
+```
+
+**Parameters**
+
+`index` The index of the detected quad to be removed.
+
+**Return Value**
+
+Returns 0 if successful, otherwise returns a negative value.
+
+### add_detected_quad
+
+Adds a `DetectedQuadElement` object to current object.
+
+```python
+def add_detected_quad(self, element: DetectedQuadElement, matrix_to_original_image: List[float] = IDENTITY_MATRIX) -> int:
+```
+
+**Parameters**
+
+`element` The detected quad to be added.
+
+`matrix_to_original_image` The matrix to the original image.
+
+**Return Value**
+
+Returns 0 if successful, otherwise returns a negative value.
+
+**See Also**
+
+[DetectedQuadElement]({{ site.ddn_python_api }}detected-quad-element.html)
+
+### set_detected_quad
+
+Sets the DetectedQuad at the specified index.
+
+```python
+def set_detected_quad(self, index: int, element: DetectedQuadElement, matrix_to_original_image: List[float] = IDENTITY_MATRIX) -> int:
+```
+
+**Parameters**
+
+`index` The index of the detected quad to be set.
+
+`element` The detected quad to be added.
+
+`matrix_to_original_image` The matrix to the original image.
+
+**Return Value**
+
+Returns 0 if successful, otherwise returns a negative value.
+
+**See Also**
+
+[DetectedQuadElement]({{ site.ddn_python_api }}detected-quad-element.html)
diff --git a/programming/python/api-reference/document-normalizer-module.md b/programming/python/api-reference/document-normalizer-module.md
index 5fef768..44eb467 100644
--- a/programming/python/api-reference/document-normalizer-module.md
+++ b/programming/python/api-reference/document-normalizer-module.md
@@ -16,7 +16,7 @@ The `DocumentNormalizerModule` class defines general functions in the document n
 *Module:* dynamsoft_document_normalizer
 
 ```python
-class DocumentNormalizerModule(object)
+class DocumentNormalizerModule
 ```
 
 ## Methods
diff --git a/programming/python/api-reference/long-lines-unit.md b/programming/python/api-reference/long-lines-unit.md
new file mode 100644
index 0000000..5892bea
--- /dev/null
+++ b/programming/python/api-reference/long-lines-unit.md
@@ -0,0 +1,129 @@
+---
+layout: default-layout
+title: LongLinesUnit Class
+description: This page shows LongLinesUnit class definition of Dynamsoft Document Normalizer SDK Python Edition.
+keywords: get_count, get_long_line, LongLinesUnit, api reference
+---
+
+# LongLinesUnit Class
+
+The `LongLinesUnit` class represents an intermediate result unit whose type is long lines. Short line segments that are located in the same line are extended and merged to form a long line segment.
+
+## Definition
+
+*Module:* dynamsoft_document_normalizer
+
+```python
+class LongLinesUnit(IntermediateResultUnit)
+```
+
+*Inheritance:* [IntermediateResultUnit]({{ site.dcv_python_api }}core/intermediate-results/intermediate-result-unit.html) -> LongLinesUnit
+
+## Methods
+
+| Method | Description |
+|--------|-------------|
+| [`get_count`](#get_count) | Gets the count of `LongLine` objects in current object.|
+| [`get_long_line`](#get_long_line) | Gets a `LongLine` object from current object by specifying a index. |
+| [`remove_all_long_lines`](#remove_all_long_lines) | Removes all the `LongLines` in current object. |
+| [`remove_long_line`](#remove_long_line) | Removes a `LongLine` from current object by specifying an index. |
+| [`add_long_line`](#add_long_line) | Adds a `LongLine` to current object. |
+| [`set_long_line`](#set_long_line) | Sets the `LongLine` at the specified index. |
+
+### get_count
+
+Gets the count of `LongLine` objects in current object.
+
+```python
+def get_count(self) -> int:
+```
+
+**Return Value**
+
+The count of `LongLine` objects in current object.
+
+### get_long_line
+
+Gets a `LongLine` object from current object by specifying a index.
+
+```python
+def get_long_line(self, index: int) -> LineSegment:
+```
+
+**Parameters**
+
+`index` The index of the `LongLine` object.
+
+**Return Value**
+
+Returns the `LongLine` object.
+
+**See Also**
+
+* [LineSegment]({{ site.dcv_python_api }}core/basic-classes/line-segment.html)
+
+### remove_all_long_lines
+
+Removes all the `LongLines` in current object.
+
+```python
+def remove_all_long_lines(self) -> None:
+```
+
+### remove_long_line
+
+Removes a `LongLine` from current object by specifying an index.
+
+```python
+def remove_long_line(self, index: int) -> int:
+```
+
+**Parameters**
+
+`index` The index of the `LongLine` to be removed.
+
+**Return Value**
+
+Returns 0 if successful, otherwise returns a negative value.
+
+### add_long_line
+
+Adds a `LongLine` to current object.
+
+```python
+def add_long_line(self, line: LineSegment, matrix_to_original_image: List[float] = IDENTITY_MATRIX) -> int:
+```
+
+**Parameters**
+
+`line` The `LongLine` to be added.
+
+`matrix_to_original_image` The matrix to the original image.
+
+**Return Value**
+
+Returns 0 if successful, otherwise returns a negative value.
+
+**See Also**
+
+* [LineSegment]({{ site.dcv_python_api }}core/basic-classes/line-segment.html)
+
+### set_long_line
+
+Sets the `LongLine` at the specified index.
+
+```python
+def set_long_line(self, index: int, line: LineSegment, matrix_to_original_image: List[float] = IDENTITY_MATRIX) -> int:
+```
+
+**Parameters**
+
+`index` The index of the `LongLine` to be set.
+
+`line` the `LongLine` to be set.
+
+`matrix_to_original_image` The matrix to the original image.
+
+**Return Value**
+
+Returns 0 if successful, otherwise returns a negative value.
diff --git a/programming/python/api-reference/normalized-image-element.md b/programming/python/api-reference/normalized-image-element.md
new file mode 100644
index 0000000..c86d71c
--- /dev/null
+++ b/programming/python/api-reference/normalized-image-element.md
@@ -0,0 +1,50 @@
+---
+layout: default-layout
+title: NormalizedImageElement Class
+description: This page shows NormalizedImageElement class definition of Dynamsoft Document Normalizer SDK Python Edition.
+keywords: get_image_data, GetReferencedElement, NormalizedImageElement, api reference
+---
+
+# NormalizedImageElement Class
+
+The `NormalizedImageElement` class stores an intermediate result whose type is normalized image.
+
+## Definition
+
+*Module:* dynamsoft_document_normalizer
+
+```python
+class NormalizedImageElement(RegionObjectElement)
+```
+
+*Inheritance:* [RegionObjectElement]({{ site.dcv_python_api }}core/intermediate-results/region-object-element.html) -> NormalizedImageElement
+## Methods
+
+| Method | Description |
+|--------|-------------|
+| [`__init__`](#__init__) | Initializes a new instance of the `NormalizedImageElement` class. |
+| [`get_image_data`](#get_image_data) | Gets the ImageData of current object. |
+
+### \_\_init\_\_
+
+Initializes a new instance of the `NormalizedImageElement` class.
+
+```python
+def __init__(self, *args, **kwargs):
+```
+
+### get_image_data
+
+Gets the image data of current object.
+
+```python
+def get_image_data(self) -> ImageData:
+```
+
+**Return Value**
+
+The image data.
+
+**See Also**
+
+* [ImageData]({{ site.dcv_python_api }}core/basic-classes/image-data.html)
diff --git a/programming/python/api-reference/normalized-image-unit.md b/programming/python/api-reference/normalized-image-unit.md
new file mode 100644
index 0000000..ed8b1f0
--- /dev/null
+++ b/programming/python/api-reference/normalized-image-unit.md
@@ -0,0 +1,92 @@
+---
+layout: default-layout
+title: NormalizedImagesUnit Class
+description: This page shows NormalizedImagesUnit class definition of Dynamsoft Document Normalizer SDK Python Edition.
+keywords: get_normalized_image, NormalizedImagesUnit, api reference
+---
+
+# NormalizedImagesUnit Class
+
+The `NormalizedImagesUnit` class represents an intermediate result unit whose type is normalized images.
+
+## Definition
+
+*Module:* dynamsoft_document_normalizer
+
+```python
+class NormalizedImagesUnit(IntermediateResultUnit)
+```
+
+*Inheritance:* [IntermediateResultUnit]({{ site.dcv_python_api }}core/intermediate-results/intermediate-result-unit.html) -> NormalizedImagesUnit
+
+## Methods
+
+| Method | Description |
+|--------|-------------|
+| [`get_count`](#get_count) | Gets the count of `NormalizedImageElement` objects in current object. |
+| [`get_normalized_image`](#get_normalized_image) | Gets a `NormalizedImageElement` object from current object. |
+| [`operator[]`](#operator) | Gets a `NormalizedImageElement` object from current object by specifying a index. |
+| [`remove_all_normalized_images`](#remove_all_normalized_images) | Removes all the normalized images in current object. |
+| [`set_normalized_image`](#set_normalized_image) | Sets the normalized image. |
+
+### get_count
+
+Gets the count of `NormalizedImageElement` objects in current object.
+
+```python
+def get_count(self) -> int:
+```
+
+**Return Value**
+
+The count of `NormalizedImageElement` objects in current object.
+
+### get_normalized_image
+
+Gets a `NormalizedImageElement` object from current object.
+
+```python
+def get_normalized_image(self, index: int) -> NormalizedImageElement:
+```
+
+**Parameters**
+
+`index` The index of the `NormalizedImageElement` object.
+
+**Return Value**
+
+Returns the `NormalizedImageElement` object.
+
+**See Also**
+
+[NormalizedImageElement]({{ site.ddn_python_api }}normalized-image-element.html)
+
+### remove_all_normalized_images
+
+Removes all the normalized images in current object.
+
+```python
+def remove_all_normalized_images(self) -> None:
+```
+
+### set_normalized_image
+
+Sets the normalized image.
+
+```python
+def set_normalized_image(self, element: NormalizedImageElement, matrix_to_original_image: List[float] = IDENTITY_MATRIX) -> int:
+```
+
+**Parameters**
+
+`element` The normalized image to be set.
+
+`matrix_to_original_image` The matrix to original image.
+
+**Return value**
+
+Returns 0 if successful, otherwise returns a negative value.
+
+**See Also**
+
+[NormalizedImageElement]({{ site.ddn_python_api }}normalized-image-element.html)
diff --git a/programming/python/api-reference/normalized-images-result.md b/programming/python/api-reference/normalized-images-result.md
index 03a2b5c..94deb80 100644
--- a/programming/python/api-reference/normalized-images-result.md
+++ b/programming/python/api-reference/normalized-images-result.md
@@ -14,7 +14,7 @@ The NormalizedImagesResult class stores a collection of captured result items wh
 *Module:* dynamsoft_document_normalizer
 
 ```python
-class NormalizedImagesResult(object)
+class NormalizedImagesResult
 ```
 
 ## Methods
diff --git a/programming/python/api-reference/simplified-document-normalizer-settings.md b/programming/python/api-reference/simplified-document-normalizer-settings.md
index d7b483b..e116550 100644
--- a/programming/python/api-reference/simplified-document-normalizer-settings.md
+++ b/programming/python/api-reference/simplified-document-normalizer-settings.md
@@ -12,7 +12,7 @@ needGenerateH3Content: true
 The `SimplifiedDocumentNormalizerSettings` class contains settings for document normalization. It is a sub-parameter of `SimplifiedCaptureVisionSettings`
 
 ```python
-class SimplifiedDocumentNormalizerSettings(object)
+class SimplifiedDocumentNormalizerSettings
 ```
 
 ## Properties Summary
diff --git a/programming/python/user-guide/getting-started.md b/programming/python/user-guide/getting-started.md
index 96f57af..41f796e 100644
--- a/programming/python/user-guide/getting-started.md
+++ b/programming/python/user-guide/getting-started.md
@@ -196,7 +196,7 @@ fetcher.set_directory("[THE DIRECTORY THAT HOLDS THE IMAGES]")
 Create a class `MyCapturedResultReceiver` to implement the `CapturedResultReceiver` class, and get the barocde results in `on_normalized_images_received` callback function.
 
 ```python
-class MyCapturedResultReceiver : CapturedResultReceiver
+class MyCapturedResultReceiver(CapturedResultReceiver)
 {
     public override void on_normalized_images_received(NormalizedImagesResult result)
     {
@@ -239,7 +239,7 @@ class MyCapturedResultReceiver : CapturedResultReceiver
 Create a class `MyImageSourceStateListener` to implement the `ImageSourceStateListener` class, and call stop_capturing in `on_image_source_state_received` callback function when the state is `ISS_EXHAUSTED`.
 
 ```python
-class MyImageSourceStateListener : ImageSourceStateListener
+class MyImageSourceStateListener(ImageSourceStateListener)
 {
     private CaptureVisionRouter? cvr = null
     public MyImageSourceStateListener(CaptureVisionRouter cvr)