Python: How to merge two dictionaries (simple example)

To merge two dictionaries in Python, you can use the update() method.

This method adds the key-value pairs from one dictionary to another, overwriting any existing keys with the same name.

Here is an example of how to use the update() method to merge two dictionaries:

dict1 = {
  "key1": "value1",
  "key2": "value2",
  "key3": "value3"
}

dict2 = {
  "key4": "value4",
  "key5": "value5",
  "key6": "value6"
}

dict1.update(dict2)
print(dict1)

This code creates two dictionaries, dict1 and dict2, and then uses the update() method to merge dict2 into dict1.

After the merge, dict1 will be equal to:

{
  "key1": "value1",
  "key2": "value2",
  "key3": "value3",
  "key4": "value4",
  "key5": "value5",
  "key6": "value6"
}

Note that this method modifies dict1 in place, so you do not need to assign the result of update() to a new variable.

If you want to create a new dictionary that is the result of merging two other dictionaries, you can use the dict() constructor and the operator, like this:

dict1 = {
  "key1": "value1",
  "key2": "value2",
  "key3": "value3"
}

dict2 = {
  "key4": "value4",
  "key5": "value5",
  "key6": "value6"
}

dict3 = dict(dict1, dict2)
print(dict3)

This code creates a new dictionary dict3 that is the result of merging dict1 and dict2. dict3 will be equal to:

{
  "key1": "value1",
  "key2": "value2",
  "key3": "value3",
  "key4": "value4",
  "key5": "value5",
  "key6": "value6"
}

Note that this method does not modify the original dictionaries, so dict1 and dict2 will remain unchanged.