<\/span><\/h2>\n\n\n\nIn both the above solutions, the entire dictionary is cloned completely. If you copy data from one dictionary to another using these methods, then the target dictionary will be completely overwritten. <\/p>\n\n\n\n
If you want to add content of one dictionary to another, without erasing its existing content, then use update() function.<\/p>\n\n\n\n
d1 = {\"a\": 1, \"b\": 2}
d2 = {\"c\": 3, \"d\": 4}
d1.update(d2)
print(d1) # Output: {'a': 1, 'b': 2, 'c': 3, 'd': 4}<\/pre>\n\n\n\nEvery dictionary supports update() function. You need to pass an argument with the dictionary whose key-value pairs you need to add to the target dictionary.<\/p>\n\n\n\n
If there are any common keys between two dictionaries then the value of the source dict provided as argument in update() function, will overwrite the value in target dict.<\/p>\n\n\n\n
d1 = {\"a\": 1, \"b\": 2, \"c\": 4}
d2= {\"c\": 3, \"d\": 4}
d1.update(d2)
print(d1) # Output: {'a': 1, 'b': 2, 'c': 3, 'd': 4}<\/pre>\n\n\n\nIn the above example, the dicts d1 and d2 have a common key ‘c’. After you copy data, its value in d1 will be that of its value in dict d2.<\/p>\n\n\n\n