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In Python, you can merge two dictionaries into a single dictionary using the update method or the ** operator.

Using the update method:

dict1 = {'a': 1, 'b': 2}
dict2 = {'c': 3, 'd': 4}

dict1.update(dict2)

print(dict1)
# Output: {'a': 1, 'b': 2, 'c': 3, 'd': 4}

Using the ** operator:

dict1 = {'a': 1, 'b': 2}
dict2 = {'c': 3, 'd': 4}

merged_dict = {**dict1, **dict2}

print(merged_dict)
# Output: {'a': 1, 'b': 2, 'c': 3, 'd': 4}

Note that if the dictionaries have overlapping keys, the values in the second dictionary will overwrite the values in the first dictionary.