robots=list(set(robots)

for i in range(nr):
    s=raw_input().split()
    robots.append({'city':s[0], 'v':s[1], 'color':i})

Traceback (most recent call last):
  File "C:\scripts\graph2\task.py", line 19, in <module>
    robots=list(set(robots))
TypeError: unhashable type: 'dict'

result = []
lst = [{1: 1, 2: 0, 3: 3}, {1: 0, 2: 2, 3: 3}, {1: 1, 2: -2, 3: 0}, {1: 1, 2: 2, 3: 3},{1: 1, 7: 0, 3: 3}, {1: 1, 2: 2, 3: 3},{1: 1, 2: 0, 3: 3}, {1: 1, 2: 2, 3: 3},]
for elem in lst:
    if not filter(lambda x: elem == x, result):
        result.append(elem)

print(result)
[{1: 1, 2: 0, 3: 3}, {1: 0, 2: 2, 3: 3}, {1: 1, 2: -2, 3: 0}, {1: 1, 2: 2, 3: 3}, {1: 1, 3: 3, 7: 0}]

>>> hash({1:1})
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: unhashable type: 'dict'