compact and flatten python

compact_and_flatten

 20 def compact_array(list_, i=0):
 21     if i == len(list_):
 22         return []
 23     if not list_[i]:
 24         return [] + compact_array(list_, i + 1)
 25     return [list_[i]] + compact_array(list_, i + 1)
 26 
 27 def flatten_array(flatten):
 28     def has_array(list_):
 29         return any((isinstance(li, list) for li in list_))
 30 
 31     if not has_array(flatten):
 32         return flatten
 33     else:
 34         items = []
 35         for item in flatten:
 36             if isinstance(item, list):
 37                 items.extend(flatten_array(item))
 38             else:
 39                 items.extend(item)
 40         return items