Python Debugging Werkzeugkiste

watch.py

def watch(var1):
    """
    Helper to watch the value of VARIABLES (not expressions)
    in the scope of calling function:

    >>> k = 3
    >>> watch('k')
    "k" := int, "3"

    Won't work with expressions like:
    >>> watch('str(k)')
    """

    import sys
    k = sys._getframe(1)
    value = k.f_locals[var1]
    print '"%s" := %s, "%s"\n' % (var1, type(value).__name__, value)