我应该从用户那里得到某些数据，有时我没有。这就是它打破代码的时候：
代码：

def check_user_data(meta_df = pd.DataFrame(),
                 params = ['param1','param2']):
    if meta_df['alpha'] in params:
        print('Alpha is available')
    if meta_df['beta'] in params:
        print('Beta is available')

user_df = pd.Series(index=['alpha'],data=['alpha1'])
check_user_data(meta_df = user_df,
                 params = ['alpha1','beta1'])

字符串
当前输出：

Alpha is available

---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)

KeyError: 'beta'

The above exception was the direct cause of the following exception:

KeyError                                  Traceback (most recent call last)

Cell In[47], line 5, in check_user_data(meta_df, params)
----> 5 if meta_df['beta'] in params:
      6     print('Beta is available')

KeyError: 'beta'

型