Some tools for a mongo course, written in python using an obfuscated functional style with emacs lambda substitution

orphans.py

from pymongo import Connection as Cn                                                              
from itertools import chain as ch                                                  
                                                                                   
collection = λ D, C: Cn()[D][C]                                   
orphans = λ c, d, j, k: {[i[j] for i in c]} - {ch(*[a[k] for a in d])} 
remove = λ d, k, c: map(d[k].remove, c)                                       
verify = λ k, t: filter(λ i: k in i[t], c)