When creating large dictionaries, I use Excel.

Example:

A1 = key, B1 = : , C1 = value

Copy for each set (next set would be in row 2, then 3 and so on)

D1 = CONCAT(A1,B1,CHAR(34),C1,CHAR(34),IF(D2="","",","))

---Hold the bottom right corner of D1 and drag down to Auto-Fill (in my example, drag to D5)

---result is key:"value" if the cell below is empty, otherwise it will be key:"value",

---CHAR(34) is for the quotes

Code=CONCAT(A1,B1,CHAR(34),C1,CHAR(34),IF(D2="","",","))

Example= key + : + " + value + " + (if cell below is empty: "" else ",") = key:"value",

E1 = CONCAT("{",D1:D5,"}") #D5 would be my last row

result = {key:"value",key:"value",key:"value"...}

Keep the sheet and re-use for other dictionaries. Just update the D1:D5 range.

Let me show you for this kata:

A1 = 1, B1 = : C1 = "kiwi" and so on...

result={1:"kiwi",2:"pear",3:"kiwi",4:"banana",5:"melon"}

Thanks. After I read this, I knew exactly what to do!