Add a list to specific lines of a (YAML) text file using python

I have an Ansible module file for NetBox with this content:

- name: "Test NetBox modules"
  connection: local
  hosts: localhost
  gather_facts: False

  tasks:
    - name: Create device within NetBox with only required information
      netbox.netbox.netbox_device:
        netbox_url: http://netbox.local
        netbox_token: thisIsMyToken
        data:
          name: xxxx
          device_type: 
          device_role: 
          site: Main
        state: present


    - name: Create device within NetBox with only required information
      netbox.netbox.netbox_device:
        netbox_url: http://netbox.local
        netbox_token: thisIsMyToken
        data:
          name: xxxx
          device_type: 
          device_role: 
          site: Main
        state: present

    - name: Create device within NetBox with only required information
      netbox.netbox.netbox_device:
        netbox_url: http://netbox.local
        netbox_token: thisIsMyToken
        data:
          name: xxxx
          device_type: 
          device_role: 
          site: Main
        state: present

It has 3 tasks for adding devices. I have a python list like this : ['switch1', 'switch2', 'switch3']

my question is how can I add this elements of list in front of name: xxxx instead of xxxx regularly using python?

I wouldn't use Python for this task (too much work and reinventing the wheel) ... I would use a specialized text processing tool that supports storing data sets e.g. arrays like awk:

awk -F'[ ]' 'BEGIN {
    devices[1] = "switch1"
    devices[2] = "switch2"
    devices[3] = "switch3"
}

/name: xxxx/ {
    i++
    $NF = devices[i]
}

{
    print
}' file.yaml

which will output:

- name: "Test NetBox modules"
  connection: local
  hosts: localhost
  gather_facts: False

  tasks:
    - name: Create device within NetBox with only required information
      netbox.netbox.netbox_device:
        netbox_url: http://netbox.local
        netbox_token: thisIsMyToken
        data:
          name: switch1
          device_type: 
          device_role: 
          site: Main
        state: present


    - name: Create device within NetBox with only required information
      netbox.netbox.netbox_device:
        netbox_url: http://netbox.local
        netbox_token: thisIsMyToken
        data:
          name: switch2
          device_type: 
          device_role: 
          site: Main
        state: present

    - name: Create device within NetBox with only required information
      netbox.netbox.netbox_device:
        netbox_url: http://netbox.local
        netbox_token: thisIsMyToken
        data:
          name: switch3
          device_type: 
          device_role: 
          site: Main
        state: present

or gawk to edit the file in place:

gawk -i inplace -F'[ ]' 'BEGIN {
        devices[1] = "switch1"
        devices[2] = "switch2"
        devices[3] = "switch3"
}

/name: xxxx/ {
        i++
        $NF = devices[i]
}

{
        print
}' file.yaml

Notice: You can still call awk or gawk from within a Python script with e.g. Python's subprocess or os modules.