in
Description
in
can be used to check if there is an entry with a certain key within a dictionary.
Example 1
p is Person
"database" in p.values
This returns true if an entry "database" is present in the persons values. If there is no such entry, it will return false.
Example 2
"Last Name" in {"First Name": "Thorben"}
This creates a simple dictionary with just one entry with the key "First Name". We then check if the entry "Last Name" exists, which is does not, so this results in a false value.
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