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[Naive] 2281 · Merge dictionary

LintCode Nov 07, 2021 Viewed 5 Comments 0

Description

  • Difficulty: Naive
  • Tag: Data Types (python), Dictionary (python)

For this question, we will provide two dictionaries dict_1 and dict_2. We have already written the merge function for you in solution.py. The dict_1 and dict_2 of this function represent the initial dictionary. You need Add dict_1 to dict_2, and finally print dict_2.

Example

The evaluation machine will execute your code by executing python main.py {input_path}, and the test data will be placed in the file corresponding to input_path. You can see how the code works in main.py.

Example one

When the input dictionary is:

{'China':'HangZhou','America':'NewYork'}
{'England':'London','Russia':'Moscow'}

The print result is:

{'England':'London','Russia':'Moscow','China':'HangZhou','America':'NewYork'}

Example two

When the input dictionary is:

{'a': 102,'b': 542}
{'c': 412,'d': 869}

The print result is:

{'c': 412,'d': 869,'a': 102,'b': 542}

Hint

For the specific content of this question, please refer to the built-in dict.update() of Python official documentation Function to learn.

Solution

Solution 1: Python

Solution 1: Solution one: add cyclically

Ideas

By looping through each key-value pair of the dictionary, and update it in dict_2.

Python

def merge(dict_1, dict_2: dict) -> dict:
    for key, value in dict_1.items():
        dict_2[key] = value

Solution 2: Using the update method

Ideas

With update method, you can update the key/value pair of dict_1 to dict_2.

Python

def merge(dict_1, dict_2: dict) -> dict:
    dict_2.update(dict_1)
Updated Nov 07, 2021