import ttfcore.common.environ as env
import ttfcore.common.context as context
show_env = env.ShowEnv()
show_cfg = show_env.show_cfg
fields = {
    'sequence': "PY",
    'shot': "5523",
    'step': "previs",
    'task': "shot",
    'version': 5
}

ctx_obj = context.from_fields(show_cfg, fields, 'maya_shot_publish')
print ctx_obj.apply_template()