Python How to create a multidimensional list?
Assesses fundamental understanding of Python conventions, runtime behavior, and memory/performance considerations.
Hiring managers look for precision, avoidance of ambiguous jargon, and ability to explain trade-offs under real production conditions.
There are two ways in which Multidimensional list can be created:
By direct initializing the list as shown below to create myList below.
>>>myList=[[227,122,223],[222,321,192],[21,122,444]]
>>>printmyList[0]
>>>printmyList[1][2]
____________________
Output
[227, 122, 223]
192
The second approach is to create a list of the desired length first and then fill in each
element with a newly created lists demonstrated below :
>>>list=[0]*3
>>>foriinrange(3):
>>>list[i]=[0]*2
>>>foriinrange(3):
>>>forjinrange(2):
>>>list[i][j]=i+j
>>>printlist
__________________________
Output
[[0,1],[1,2],[2,3]]
Candidate Response Strategy & Interview Tips
- Start with a concise one-sentence summary: Deliver a direct, confident answer first before expanding into nuances.
- Demonstrate real-world trade-offs: Discuss where this approach excels and when you would avoid it in production systems.
- Discuss complexity & edge cases: Proactively explain time/space complexity or boundary conditions (null values, scale limits).
- Prepare for interviewer follow-ups: Technical hiring panels frequently probe deeper into concurrency, backward compatibility, or alternative libraries.