Copy item from one dict to another

[Pavel_47]

Hello,
Does exist a method of copying an items from one dict to another, e.g. inside a for loop, under specific conditions ?
I tried

for item in dict1.items():
if {condition}:
dict2.update(item)

Doesn't work.
Thanks

[Pavel_47]

Resolved: item in update should be in curly brackets

for item in dict1.items():
if {condition}:
dict2.update({item})

[deanhystad]

You can use a dictionary comprehension.

d1 = {'A': 1, 'B': 3}
d2 = {'C': 4, 'D': 5, 'E': 6, 'F':7}
d1.update({key: value for key, value in d2.items() if value % 2})
print(d1)

Output:
{'A': 1, 'B': 3, 'D': 5, 'F': 7}

In response to your second post, curly brackets (set) are probably not the correct choice. You could use square brackets (list) or round brackets (tuple). The important thing is that the argument is iterable object with key value pairs.

d1 = {'A': 1, 'B': 3}
d2 = {'C': 4, 'D': 5, 'E': 6, 'F':7}
d1.update((item for item in d2.items() if item[1] % 2))
print(d1)

Output:
{'A': 1, 'B': 3, 'D': 5, 'F': 7}

[Pavel_47]

Thanks,
Anyway, the code pattern in my 1st post is irrelevant because in the condition the item's value is checked.
So the loop should run on (key, value) rather than on items.