> For the complete documentation index, see [llms.txt](https://sandbox-docs.verifone.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://sandbox-docs.verifone.com/s-adk-5.1-programmers-guide/readme/namespaces/namespacepackmanlib/namespacepackmanlib_1_1treewalk/classpackmanlib_1_1treewalk_1_1_tree_walker.md).

# TreeWalker

[Public Member Functions](#pub-methods) | [Static Public Member Functions](#pub-static-methods) | [Data Fields](#pub-attribs)

|                         |                                                                                                                                                                                                                                                                             |
| ----------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Public Member Functions |                                                                                                                                                                                                                                                                             |
| def                     | [\_\_init\_\_](#a8959b99ed170ca2ff5746a9f132b3fec) (self, [max\_arc\_depth](#a6477cbfdaff96a77de0cfe7edc1ddb11), [max\_depth](#abe0b4340c0a3ede312856c001b86d7ed), [writable\_only](#af47dbfb6056d76098bd84472beab442f), [post\_order](#a81bec6e1a4754daae86bdef84ac8fa14)) |

|                                |                                                                                                                                                                                                                                                                                                                                                                |
| ------------------------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Static Public Member Functions |                                                                                                                                                                                                                                                                                                                                                                |
| def                            | [walk](#ac3ce320a4b61165e04d04473720d017c) (nodes, [observers](#a6b0642912968743133a34ab9d32e2285), [max\_arc\_depth](#a6477cbfdaff96a77de0cfe7edc1ddb11)=-1, [max\_depth](#abe0b4340c0a3ede312856c001b86d7ed)=-1, children\_start=False, [writable\_only](#af47dbfb6056d76098bd84472beab442f)=False, [post\_order](#a81bec6e1a4754daae86bdef84ac8fa14)=False) |
|                                | <p>Performs a depth-first / pre-order walk through the node calling observers callbacks. <a href="#ac3ce320a4b61165e04d04473720d017c">More...</a><br></p>                                                                                                                                                                                                      |

|             |                                                       |
| ----------- | ----------------------------------------------------- |
| Data Fields |                                                       |
|             | [observers](#a6b0642912968743133a34ab9d32e2285)       |
|             | [max\_arc\_depth](#a6477cbfdaff96a77de0cfe7edc1ddb11) |
|             | [max\_depth](#abe0b4340c0a3ede312856c001b86d7ed)      |
|             | [writable\_only](#af47dbfb6056d76098bd84472beab442f)  |
|             | [post\_order](#a81bec6e1a4754daae86bdef84ac8fa14)     |

### Constructor& Destructor Documentation

### \_\_init\_\_() <a href="#a8959b99ed170ca2ff5746a9f132b3fec" id="a8959b99ed170ca2ff5746a9f132b3fec"></a>

def \\\_\\\_init\\\_\\\_

### MemberFunction Documentation <a href="#member-function-documentation" id="member-function-documentation"></a>

### walk() <a href="#ac3ce320a4b61165e04d04473720d017c" id="ac3ce320a4b61165e04d04473720d017c"></a>

def walk

static

Performs a depth-first / pre-order walk through the node calling observers callbacks.

**Parameters**

**node** start traversal from these nodes (single or list) **observers** list of observers to be called **max\_arc\_depth** maximum archive recursion depth, negative is infinite **max\_depth** maximum recursion depth, negative is infinite **children\_start** start with node's children instead of node itself **writable\_only** call observers only on writable nodes **post\_order** post-order traversal if True, pre-order traversal if False

### FieldDocumentation <a href="#field-documentation" id="field-documentation"></a>

### max\_arc\_depth <a href="#a6477cbfdaff96a77de0cfe7edc1ddb11" id="a6477cbfdaff96a77de0cfe7edc1ddb11"></a>

max\_arc\_depth

### max\_depth <a href="#abe0b4340c0a3ede312856c001b86d7ed" id="abe0b4340c0a3ede312856c001b86d7ed"></a>

max\_depth

### observers <a href="#a6b0642912968743133a34ab9d32e2285" id="a6b0642912968743133a34ab9d32e2285"></a>

observers

### post\_order <a href="#a81bec6e1a4754daae86bdef84ac8fa14" id="a81bec6e1a4754daae86bdef84ac8fa14"></a>

post\_order

### writable\_only <a href="#af47dbfb6056d76098bd84472beab442f" id="af47dbfb6056d76098bd84472beab442f"></a>

writable\_only

***

The documentation for this class was generated from the following file:

* packman/packmanlib/[treewalk.py](/s-adk-5.1-programmers-guide/readme/files/dir_026ced32df3e5de142ca5346a10962b0/dir_76d7bc695de4919fb54ecb5d68e5f54d/treewalk_8py.md)


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