wintermonster

list_of_races = [[('c','d'), ('a','b'),('b','c')], 
                 [('C', 'B'), ('D', 'C'), ('B', 'E'), ('A', 'D')]]

for races in list_of_races:
    print(races)
    races = dict(races)
    start_city = (set(races.keys()) - set(races.values())).pop()
    end_city  = (set(races.values()) - set(races.keys())).pop()
    all_cities = list(set(races.keys()).union(set(races.values())))

wintermonster

activate="E:\_virtual_envs\$*\Scripts\activate"
listenvs=ls 'E:\_virtual_envs'
virtualenv=virtualenv "E:\_virtual_envs\$*"