8/26/2023 0 Comments Vscode debug python scriptSo now if we inspect the value of the variable y in the next line we’ll see that we get the value of y as 50. We can do this using various commands as shown here. Using the command p out we would then print out the results of the expressions as shown below.īut what we can do now is we can actually run it again and we’re going to go into the function. Now using the command n we want to execute the expressions inside the current function and still stay in this function. ![]() Similarly, we can inspect the value of the variable y by typing the command p followed by the name of the variable as shown below. This command returns the value of the variable as shown in the code below. For instance, using the p command, we can inspect various variables in the programs by typing the letter p followed by a single space and the name of the variable. Using the commands enlisted earlier we can perform a few executions. Upon running this program we will get into an interactive PDB shell in the terminal where we have the breakpoint. Furthermore, we have also set a breakpoint which when hit will open a debugging environment in the terminal. c(continues) – Executes code and only stops when a breakpoint is encountered.īelow is a simple function that accepts two numbers as arguments, does some calculations and gives us a number at the end.īesides the function definition, we have also initialized x and y with values 20 and 50 respectively.The p expression – Executes and prints the values of the expression in the current context.n(next) – Unlike the step command which stays and stops inside the current function this command executes called functions.s(tep) – The command, in this case, is reduced to s which executes the current line and stops in the next line of the current function or when a function is called.Some of the most common commands provided by the module that can be used in the debugger include: This built-in function does not only import the module and call pdb.set_trace() by default but also provides us with the ability to control the debugging behaviour using its API. Inversions later than Python 3.6 would still work, however, a more precise way is the use of the built-in function breakpoint() without defaults. To set up a breakpoint we would then do pdb.set_trace() as shown in the code below. Prior to version 3.7 of Python we needed to import the PDB module at the top of the program that we needed to import. It also allows us to interrogate our code line by line, pause and resume the execution of our code as we inspect variable execution.īy doing so we are able to determine how each line of code affects the flow of the program. The PDB module allows us to set breakpoints within our code. In this article, you’ll learn how to debug in Python by using different methods. ![]() This module is provided by the standard library and therefore needs no installation. The built-in module PDB is an interactive source code debugger for Python programs. Debugging is a very important aspect of writing programs that every developer should master.
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