OrderedDict is a dictionary that remembers the order of inserting the keys. If the new entry rewrites the existing entry, the initial position of the insert remains unchanged.

Fromkeys () creates a new dictionary and returns a list of keys. The keys for the new dictionary are taken from the SEQ, and the values ​​from Value (if set). Fromkeys () - fromkekeys (Seq [, value]) syntax.

SEQ: This is a list of values ​​that will be used in the preparation of keys for the dictionary.

Value: optionally; If you set, the value will be set as Value.

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