human
Solve the following python programming problem given the following code:
@ register_line_magic ('plt') 
@ register_line_magic ('plot') 
@ register_line_magic ('pyplot') 
@ register_line_magic ('pyploy') 
def _pyplot(line) : 
    _ip.run_line_magic ('matplotlib', line) 
    _ip.run_code ('from matplotlib import pyplot as plt') 
    _ip.run_code ("plt.style.use('bmh')") 
    def hist_(* args, **kwargs) : 
        kwargs.pop ('alpha', None) 
        kwargs.pop ('histtype', None) 
        kwargs.pop ('normed', None) 
        return plt.hist (* args, histtype = 'stepfilled', alpha = 0.85, normed = True, ** kwargs) 
def figsize(sizex, sizey) : 
        "Set the default figure size to be [sizex, sizey].
        This is just an easy to remember, convenience wrapper that sets::
          matplotlib.rcParams['figure.figsize'] = [sizex, sizey]
        " 
        import matplotlib 
        matplotlib.rcParams ['figure.figsize'] = [sizex, sizey] 
_ip.user_ns ['hist_'] = hist_ 
    _ip.user_ns ['figsize'] = hist_ 
    _ip.user_ns ['plot'] = plt.plot 
    _ip.user_ns ['subplot'] = plt.subplot 

    
    

    Fix the buggy line: _ip.user_ns ['figsize'] = hist_
assistant
#Here is Python code to fix the buggy line: _ip.

_ip.user_ns ['figsize'] = def figsize(