Converting date formats in pandas dataframe

Question

I have a dataframe and the Date column has two different types of date formats going on.

eg. 1983-11-10 00:00:00 and 10/11/1983

I want them all to b

Answer 1

Input date is NSECODE Date Close 1 NSE500 20000103 1291.5500 2 NSE500 20000104 1335.4500 3 NSE500 20000105 1303.8000

history_nseindex_df["Date"] = pd.to_datetime(history_nseindex_df["Date"])
history_nseindex_df["Date"] = history_nseindex_df["Date"].dt.strftime("%Y-%m-%d")

ouput is now NSECode Date Close 1 NSE500 2000-01-03 1291.5500 2 NSE500 2000-01-04 1335.4500 3 NSE500 2000-01-05 1303.8000