What’s Changed


will display the value of local variables. When invoked again, only those variables that have changed (since the last show.changed() in the same context) will be displayed. For example:

def f():
    x = 4
    x += 1
    retval = x * 3
    return retval

When run will display:

x: 4
x: 5  retval: 15

You may omit some local variables if you like. By default, those starting with underscores (_) will be omitted, as will those containing functions, methods, builtins, and other parts Python program infrastructure. If you’d like to add those, or global variables into the mix, that’s easily done:

show.changed(_private, MY_GLOBAL_VAR)

Will start watching those.