How to Efficiently Initialize a Multidimensional Python List with Uniform Values?

Initializing a Multidimensional Python List with Uniform Values

When embarking on Python programming, it's common to encounter the need for multidimensional lists, where each element is filled with the same value. Several methods exist to achieve this efficiently.

One approach, as demonstrated in the given code, involves initializing a two-dimensional list (twod_list) and appending a newly created sublist (new) containing identical values. While functional, it can be verbose.

A more concise and elegant approach is to utilize Python's list comprehension feature. The following code initializes a two-dimensional list with dimensions 10x10, filled with the value foo:

t = [[foo]*3 for i in range(3)]

However, it's crucial to avoid using [[v]*n]*n as it creates shallow copies, leading to undesired behavior where changes in one sublist propagate to all.

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