5. Dictionaries

• The dictionary itself consists of relating a key with a specific value

• Unlike lists, where the index is a number, dictionaries use their keys as index

• To add new elements that I don’t need to add, just make the session

  • If the key already exists: the associated value changes

  • If the key does not exist: the new key is added

Activity: CodeLens 5.1 (cl_l23_5a_en)

d = {} d["a"] = "alpha" d["o"] = "omega" d["g"] = "gamma" print(d) # This line will result in an error because there is no # a "x" key in the dictionary print(d["x"])

Activity: CodeLens 5.3 (cl_l23_5b_en)

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