How to explode a list inside a Dataframe cell into separate rows

Question

I\'m looking to turn a pandas cell containing a list into rows for each of those values.

So, take this:

If I\'d like to unpack and stack the value

Answer 1

Nicer alternative solution with apply(pd.Series):

df = pd.DataFrame({'listcol':[[1,2,3],[4,5,6]]})

# expand df.listcol into its own dataframe
tags = df['listcol'].apply(pd.Series)

# rename each variable is listcol
tags = tags.rename(columns = lambda x : 'listcol_' + str(x))

# join the tags dataframe back to the original dataframe
df = pd.concat([df[:], tags[:]], axis=1)