def debug_script(script):
    def get_source(fname):
        return script

    class Loader:
        def __init__(self):
            self.get_source = get_source

    globs = {}
    globs.update(globals())
    globs['__loader__'] = Loader()
    globs['__name__'] = 'script_name'
    code = compile(script, 'script_name', 'exec')
    return code, globs

s= """
x = 1
y = 'blabla'
"""
code, globs = debug_script(s)
exec(code, globs)