How to use like operator in frappe.db.count

Frappe Framework App Development
1

Hi,
I really appreciate if anyone tell me what the right way to use like operator in frappe.db.count.
I know a bit that it is used using filter but don’t know the exact syntax.

Table Name: BOM Item
Field Name Where Like Operator Need to be used is: parent

I am using the below and getting error:

@frappe.whitelist(allow_guest=True)
def find_bom(item_code,bom_code):
	bom_code='BOM%'+bom_code
	j=frappe.db.count("BOM Item", filters=[["BOM Item", "parent", "like", "{0}%".format(bom_code)]])
	frappe.msgprint(j)
2 
frappe.db.count("BOM Item", {"parent": ("like", "%cs%")})
3

LIKE operator in filter argument - Database API

For String

# Tasks with subject that contains "test"
frappe.db.get_list('Task', filters={
    'subject': ['like', '%test%']
})

For Variable

frappe.db.get_list('Task', filters={
    'subject': ['like', '%' doc.custom_field '%']
})