Python : how to print values of all constants from an import?

Question

I group and store my constants (can be a dict.) in a separate python file. E.g. parameters.py :

HARD_COPY=True
BOOKS={
    2018:{"author":"Hugo"}
    }
etc.

In a source file, I write :

import parameters as para

Of course, I can use the variables knowing their names (para.BOOKS, etc.). But I wish to display their names and values, whatever those names can be.

If I write dir(para), I can see the list of these names. But how can I print their values ?

I'd like to display :

My defined variables in parameters.py : 
HARD_COPY : True
BOOKS     : {2018:{"author":"Hugo"}}
etc.

Answer 1

Use getattr to access its value by name.

import parameters as para


print('My defined variables in parameters.py : ')

for variable in dir(para):
    if not variable.startswith('__'):
        print(variable, ':', getattr(para, variable))

Output:

My defined variables in parameters.py :
BOOKS : {2018: {'author': 'Hugo'}}
HARD_COPY : True