my_dict = {'foo': 'bar', 'spam': 'eggs'}
next(iter(my_dict)) # outputs 'foo'
# or
my_dict = {'foo': 'bar', 'spam': 'eggs'}
list(my_dict.keys())[0] # outputs 'foo'
res = next(iter(test_dict))
my_dict = {'foo': 'bar', 'spam': 'eggs'}
next(iter(my_dict)) # outputs 'foo'