# merge two dictionaries

a = {'apple':1, 'melon': 4}

b = {'apple': 2, 'orange': 2,'banana':3}

​

merge_dic = {**a, **b}

print(merge_dic)                        # {'apple': 2, 'melon': 4, 'orange': 2, 'banana': 3}

#Python 3.9:

# a|b

d1 = {'name': 'Alex', 'age': 25}

d2 = {'name': 'Alex', 'city': 'New York'}

merged_dict = {**d1, **d2}

print(merged_dict) # {'name': 'Alex', 'age': 25, 'city': 'New York'}

>>> dict_a = {'a': 1, 'b': 2}

>>> dict_b = {'b': 3, 'c': 4}

>>> dict_c = {**dict_a, **dict_b}

>>> dict_c

# {'a': 1, 'b': 3, 'c': 4}

# Python 3.9

z = x | y

​

# Python 3.5

z = {**x, **y}

​

# Python <= 3.4

def merge_two_dicts(x, y):

    z = x.copy()   # start with keys and values of x

    z.update(y)    # modifies z with keys and values of y

    return z

​

z = merge_two_dicts(x, y)

dict_1 = {1: 'a', 2: 'b'}

dict_2 = {2: 'c', 4: 'd'}

​

dict_3 = dict_2.copy()

dict_3.update(dict_1)

​

print(dict_3)

foreach (var item in custom_settings)

{

   default_settings[item.Key] = item.Value;

}

# merge two dictionaries

x = {'a': 1,'b':2}

y = {'d':3,'c':5}

z = {**x, **y}

print(z)                    # {'a': 1, 'b': 2, 'd': 3, 'c': 5}

​

public static Dictionary<TKey, HashSet<T>> Merge<TKey, T>(this Dictionary<TKey, HashSet<T>> destination, Dictionary<TKey, HashSet<T>> source)

{

    if (destination.Count == 0)

    {

        destination.AddRange(source);

        return destination;

    }

    if (source.Count == 0)

        return destination;

​

    foreach (var keyValuePair in source)

    {

        if (destination.Keys.Contains(keyValuePair.Key))

            destination[keyValuePair.Key].UnionWith(keyValuePair.Value);

        else

            destination.Add(keyValuePair.Key, keyValuePair.Value);

    }

​

    return destination;

}

dict_1 = {1: 'a', 2: 'b'}

dict_2 = {2: 'c', 4: 'd'}

​

print(dict_1 | dict_2)

dict_1 = {1: 'a', 2: 'b'}

dict_2 = {2: 'c', 4: 'd'}

​

print({**dict_1, **dict_2})

yusuke_power = {"Yusuke Urameshi": "Spirit Gun"}

hiei_power = {"Hiei": "Jagan Eye"}

powers = dict()

​

# Brute force

for dictionary in (yusuke_power, hiei_power): 

  for key, value in dictionary.items(): 

    powers[key] = value

​

# Dictionary Comprehension

powers = {key: value for d in (yusuke_power, hiei_power) for key, value in d.items()}

​

# Copy and update

powers = yusuke_power.copy()

powers.update(hiei_power)

​

# Dictionary unpacking (Python 3.5+)

powers = {**yusuke_power, **hiei_power}

​

# Backwards compatible function for any number of dicts

def merge_dicts(*dicts: dict): 

  merged_dict = dict() 

  for dictionary in dicts: 

    merge_dict.update(dictionary) 

  return merged_dict