In [16]: for i in Products._meta.fields:
   ....:     print i.verbose_name
   ....:
   ....:
ID
name
model
catalog
brand
category
tag
description
price
image
thumbnail


for n in object_instance._meta.fields:
     if n.verbose_name == 'RELATED_FOREIGNKEY_MODEL_VERBOSE_NAME':
         #Model has FK relation
for n in object_instance._meta.many_to_many:
     if n.verbose_name == 'RELATED_M2M_MODEL_VERBOSE_NAME:
         #Model has m2m relation

#the ._meta.fields and ._meta.many_to_many are attributes of the model itself so:

Model._meta.fields and Model._meta.many_to_many work as well
# You can also simply introspect the instance itself to find out the  
# model worked with:
object_instance._meta.verbose_name