dictionary Datatype

• The dict datatype is predefine class treated as dict category datatype

• The purpose of dict datatype store the value of key and value of value
  key of value is unique and value of value may be or may not be unique

• The scinentific notation of dict datatype is curly braces
  We must be sepreated value by comma.
  dict datatype maintain the insertion order

• An object of dict datatype dose not perform both indexing and slicing
  operation becoz key of value is immutable
  and on dict datatype we perform the keys operation
  value of value is mutable

• we can modify the value of value but we can not modify the value of key

• Pyhton programing lang in dict datatype we use two type of dict datatype
  Empty dict datatype
  Non-Empty dict datatype