how to i change the format of date from dd-mm-yyyy to dd/mm/yyyy in a csv file

Question

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I have CSV with date in this format which is to be changed? how can I do that?

Answer 1

import pandas as pd

# I have taken an example. You could do a pd.read_csv(filename) to read from file

#Input in dd-mm-yyyy format
df = pd.DataFrame({'DOB': {0: '26-01-2016', 1: '26-01-2016'}})

#Convert to pandas datetime object
df['DOB'] = pd.to_datetime(df.DOB)

#Convert to dd/mm/yyyy format('%d/%m/%Y')
df['DOB'] = df['DOB'].dt.strftime('%d/%m/%Y')

You can read more here: https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Series.dt.strftime.html