from tinynetrc import Netrc

netrc = Netrc()  # parse ~/.netrc
# Get credentials
netrc['api.heroku.com']['login']
netrc['api.heroku.com']['password']

# Modify an existing entry
netrc['api.heroku.com']['password'] = 'newpassword'
netrc.save()  # writes to ~/.netrc

# Add a new entry
netrc['surge.surge.sh'] = {
    'login': 'sloria1@gmail.com',
    'password': 'secret'
}
netrc.save()

# Removing an new entry
del netrc['surge.surge.sh']
netrc.save()

from tinynetrc import Netrc
with Netrc() as netrc:
    netrc['api.heroku.com']['password'] = 'newpassword'
    assert netrc.is_dirty is True
# saved!