Changing pandas dataframe values from list to string

Question

I have a dataframe where most of values are stored as list. That is unnecessary to me. I would like to convert those list into their first(and only member). That is to say, I would like to value = value[0]. But this does not work

All in all: How to "unlist" all values in dataframe?

behzad.nouri · Accepted Answer · 2014-07-11 11:41:29Z

2

Probably you can use .applymap. Something like:

>>> unlist = lambda l: l[0] if len(l) != 0 else None
>>> unwrap = lambda l: unlist(l) if isinstance(l, list) else l
>>> df.applymap(unwrap)

answered Jul 11, 2014 at 11:41

behzad.nouri

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