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@EntityPreHook(EntityCondition.equals_entity_classname('prop_physics'), 'touch')
def pre_start_touch(stack):
    entity = make_object(Entity, stack[0])
    other = make_object(Entity, stack[1])

@EntityPreHook(EntityCondition.equals_entity_classname('prop_physics'), 'touch')
def pre_start_touch(stack):
    print(1)
    entity = make_object(Entity, stack[0])
    print(2)
    other = make_object(Entity, stack[1])
    print(3)

@EntityPreHook(EntityCondition.equals_entity_classname('prop_physics'), 'touch')
def pre_start_touch(stack):
    core.console_message('\ntest\n')

@EntityPreHook(EntityCondition.is_player, 'touch')
def pre_start_touch(stack):
    entity = make_object(Entity, stack[0])
    other = make_object(Entity, stack[1])
    core.console_message("\n%s and %s\n" % (entity.classname,other.classname))

@EntityPreHook(EntityCondition.equals_entity_classname('prop_physics'), 'touch')
def pre_start_touch(stack):
    core.console_message('\ntest\n')

# ../addons/source-python/plugins/testing/testing.py

# ============================================================================
# >> IMPORTS
# ============================================================================
# Source.Python Imports
#   Entities
from entities.entity import Entity
from entities.hooks import EntityCondition
from entities.hooks import EntityPreHook
from entities.helpers import index_from_pointer
from entities.helpers import index_from_inthandle
#   Memory
from memory import NULL
from memory import Convention
from memory import DataType

# ============================================================================
# >> HOOKS
# ============================================================================
@EntityPreHook(
    EntityCondition.equals_entity_classname('prop_physics'), 'touch')
def pre_touch(stack):
    entity = Entity(index_from_pointer(stack[0]))
    other = Entity(index_from_pointer(stack[1]))
    on_touch(entity, other)
    ptr = entity.get_property_pointer('m_pfnTouch')
    if ptr != NULL:
        func = ptr.make_function(Convention.THISCALL,
            (DataType.POINTER, DataType.POINTER), DataType.VOID)
        func(entity, other)
    handle = entity.get_property_int('m_pParent')
    if handle != -1:
        parent = Entity(index_from_inthandle(handle))
        parent.touch.call_trampoline(other)
        on_touch(parent, other)
    return False


# ============================================================================
# >> CALLBACKS
# ============================================================================
def on_touch(entity, other):
    print(entity.classname, 'is touching', other.classname)