← Lab 2

Dictionaries — lookup tables

Look it up
  • ▸Key → value pairs: codon_table = {"ATG": "Met", …}
  • ▸Look up by key: codon_table["ATG"] → "Met"
  • ▸Missing key → KeyError; use .get(codon, "?") to stay safe
Build & check
  • ▸Add or update: codon_table["TGG"] = "Trp"
  • ▸Search a key: "ATG" in codon_table → True / False
  • ▸Values can be numbers, lists, even other dicts
📓 Dictionaries — practice notebook →