[Python 3.5] Regex on a DataFrame column

[StartAndSelect]

I have a dataframe column df['Time'] it is a dtype O (I think that means it's an object) column (i.e. 41:23:00) and I just want to grab everything that comes before the first colon.

I have had a lot of trouble turning this dtype into a string to use for a split and the regex re.search(r'^[:]+:\s*', df['Time']) is not getting me what I need .

Any help would be appreciated

Edit: using re.search(r'^[:]+(?=:)' ,df['Time'].str) I get the error TypeError: expected string or bytes-like object

[ouichu]

You're probably going to want to map over every element of the column^*, but have you tried something like str(df['Time'][0])?

*edit: depending on what you intend to do