Pandas convert a column of list to dummies

Give a sample like:

index groups  
0     ['a','b','c']
1     ['c']
2     ['b','c','e']
3     ['a','c']
4     ['b','e']

And create a series of dummy columns to identify which groups each user belongs to in order to run some analyses.

index  a   b   c   d   e
0      1   1   1   0   0
1      0   0   1   0   0
2      0   1   1   0   1
3      1   0   1   0   0
4      0   1   0   0   0

Solution is use str.join to join all elements in list present in series into string and then use str.get_dummies:

df.join(df['groups'].str.join('|').str.get_dummies())