Python One effective method often used by programmers to comprehend the effect o

Question

Python

One effective method often used by programmers to comprehend the effect of code is "tracing Tracing is hand-executing the code in the same sequence and manner that the computer would execute the program. Often, the changes made to variables in the code are recorded in a "trace table". Each row in the trace table records the values of the variables after a corresponding statement in the left hand column of the trace table has been hand-executed. For example, for the code holden 2 ford a 13 mitsubishi 5 a completed trace table would be: mitsubishi holden holden 2 ford 13 2 13 2 13 5 mitsubishi 5 Your task is to trace execution of the following Python code and keep track ofvariables index, what and answer: nums 13, 0, 2, 10 What runs [01 for index in range (1, en (nums) if nums index what what n index answer E what

Explanation / Answer

The frame contains the attribute "f_lineno" which is the line number about to be run. Here is a simple example which only prints the current line number. Note that the trace function returns itself. If it doesn't then Python's trace mechanism interprets that as a request to stop the tracing while inside the given scope.

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