You can iterate over the keys in a dictionary using various methods in Python. Here are five examples:

1. Using a for loop:

my_dict = {'a': 1, 'b': 2, 'c': 3}

for key in my_dict:
    print(key)

2. Using the keys() method:

my_dict = {'a': 1, 'b': 2, 'c': 3}

for key in my_dict.keys():
    print(key)

3. Using a comprehension:

my_dict = {'a': 1, 'b': 2, 'c': 3}

keys = [key for key in my_dict]
print(keys)

4. Using the iterkeys() method (Python 2):

my_dict = {'a': 1, 'b': 2, 'c': 3}

for key in my_dict.iterkeys():
    print(key)

5. Unpacking the dictionary directly:

my_dict = {'a': 1, 'b': 2, 'c': 3}

for key, value in my_dict.items():
    print(key)

All these methods achieve the same result of iterating over the keys of the dictionary.