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"""

Given an array of strings, group anagrams together.

For example, given: ["eat", "tea", "tan", "ate", "nat", "bat"],

Return:

[

["ate", "eat","tea"],

["nat","tan"],

["bat"]

]

"""

class Solution(object):

def groupAnagrams(self, strs):

d = {}

ans = []

k = 0

for str in strs:

sstr = ''.join(sorted(str))

if sstr not in d:

d[sstr] = k

k = k+1

ans.append([])

ans[-1].append(str)

else:

ans[d[sstr]].append(str)

return ans