for loop - Looping a list through dictionary values python -

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i wondering if it's possible loop list of values
example:

lst = ['rh', 'cd241', 'c2', 'sczd9', 'rg59l', 'wnt3a']

through values of dictionary
example:

ref_dict = {     '': [''], '6005': ['rh50a', 'cd241', 'slc42a1'], '603': [''],     '6000': [''], '8787': ['perrs', 'rgs9l', 'mgc26458'],     '41': ['accn2', 'bnac2', 'hbnac2'], '8490': [''],     '9628': [''], '5999': ['sczd9'] }

to check if individual value in list has value in dictionary, if have value, return me key in value in.

example : lst value cd241 in dictionary '6005': ['rh50a, cd241, slc42a1'], return me key "6005".

from collections import defaultdict  lst = ['rh', 'cd241', 'c2', 'sczd9', 'rg59l', 'wnt3a'] ref_dict = {     '': [''], '6005': ['rh50a, cd241, slc42a1'], '603': [''],     '6000': [''], '8787': ['perrs, rgs9l, mgc26458'],     '41': ['accn2, bnac2, hbnac2'], '8490': [''],     '9628': [''], '5999': ['sczd9'] }   all_values = defaultdict(list) key in ref_dict:     value in (map(lambda x: x.strip(), ref_dict[key][0].split(","))):         all_values[value].append(key)  print all_values['cd241'] # ['6005']

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