How to convert a pandas dataframe into a python list, and a python list into a pandas dataframe?

 How to convert a pandas dataframe into a python list, and a python list into a pandas dataframe?

1. To convert a pandas dataframe into a python list

email_list = df['Email'].to_list()

or

email_list = df[['Name', 'Email']].to_list()

2. To convert a python list into a pandas dataframe

Examples

>>> mydict = [{'a': 1, 'b': 2, 'c': 3, 'd': 4},
...           {'a': 100, 'b': 200, 'c': 300, 'd': 400},
...           {'a': 1000, 'b': 2000, 'c': 3000, 'd': 4000 }]
>>> df = pd.DataFrame(mydict)
>>> df
      a     b     c     d
0     1     2     3     4
1   100   200   300   400
2  1000  2000  3000  4000