print_r prints a PHP variable into human readable form.
The same can be achieved in Python using pprint module.
Here is an example python code:
from pprint import pprint
student = {'Student1': { 'Age':10, 'Roll':1 },
'Student2': { 'Age':12, 'Roll':2 },
'Student3': { 'Age':11, 'Roll':3 },
'Student4': { 'Age':13, 'Roll':4 },
'Student5': { 'Age':10, 'Roll':5 }
}
pprint(student)
Hope it helps. Thanks.