import csv
import os  
 
file_path = '/shp/ahps/inundation/' 
csv_w_file = '/shp/ahps/a.csv'

def get_immediate_subdirectories(a_dir):
     return [name for name in os.listdir(a_dir)
             if os.path.isdir(os.path.join(a_dir, name))]   

b = get_immediate_subdirectories(file_path)  

with open(csv_w_file, mode='w') as employee_file:
     employee_writer = csv.writer(employee_file, delimiter=',', quotechar='"', quoting=csv.QUOTE_MINIMAL)
     for a in b:	
	employee_writer.writerow(a)