Can you explain the program and output?

Question

https://code.sololearn.com/cgHvQ8Y1KB5V/?ref=app

Answer 1

Print 'd' before the last line to understand it better. The dictionary 'c' is at index 2 and 3 is the key in that dictionary. So it results in the value at that key which is 2.

You can try d[2][6] and it will give you a key error since there is no matching key in the dictionary.

Answer 2

Thanks