how to set breakpoint in python

To set a breakpoint in Python, you can use the built-in `pdb` module. Here are the steps:

1. Import the `pdb` module at the beginning of your Python script:

import pdb

2. Place the line `pdb.set_trace()` at the point in your code where you want to set the breakpoint.

x = 7
y = 4
pdb.set_trace()  # breakpoint
z = x + y
print(z)

3. Run your script. When the `pdb.set_trace()` line is reached, the program execution will pause and enter the debugger mode.

4. You can now use various commands to inspect the state of your program, including `list` to show the current line of code, `step` to execute the current line and move to the next line, `next` to execute the current line and move to the next line, but not step into any function calls, and `quit` to exit the debugger and terminate the program.

5. To continue program execution until the next breakpoint, use the `continue` command.