class Solution(object):

def wordPattern(self, pattern, str):

"""

:type pattern: str

:type str: str

:rtype: bool

"""

# Logic 1:

# We loose the positions of the characters in string.. so this wont work

#return len(set(pattern)) == len(set(str.split(" ")))

# Logic 2:

relation = {}

visited = set()

s = str.split(" ")

if len(s) != len(pattern):

return False

for i, j in zip(pattern, s):

if i not in relation and j not in visited:

relation[i] = j

visited.add(j)

if i in relation and relation[i] == j:

pass

else:

return False

return True