python create a dictionary from a dataframes code example
Example 1: pandas dataframe from dict
>>> pd.DataFrame.from_dict(data, orient='index',
... columns=['A', 'B', 'C', 'D'])
A B C D
row_1 3 2 1 0
row_2 a b c d
Example 2: dataframe to dictionary using index as key
df.to_dict('index')
Example 3: dataframe to dict without index
{'Name': ['John', 'Sara', 'John', 'Sara'],
'Sem': ['Sem1', 'Sem1', 'Sem2', 'Sem2'],
'Subject': ['Mathematics', 'Biology', 'Biology', 'Mathematics'],
'Grade': ['A', 'B', 'A+', 'B++']}