Filtering a Dictionary Against a List of Values

Python Tip: You can filter a dictionary against keys that are present in a list by using dictionary comprehension.

Here’s an example 👇

vlans = {
    100: "VLAN-100-HR",
    200: "VLAN-200-IT",
    300: "VLAN-300-Finance",
}

filter_ids = [100, 300]

filtered_vlans = {
    vlan_id: vlan_name for vlan_id, vlan_name in vlans.items() if vlan_id in filter_ids
}

print(filtered_vlans)
# Output:
# {100: 'VLAN-100-HR', 300: 'VLAN-300-Finance'}