如何将ID添加到密码==提示？

Question

我想向密码=提示本身添加一个ID。但是我该怎么做？

# random values and similar structure
np.random.seed(1)
df = pd.DataFrame(np.random.random(40).reshape(-1, 4), 
                  columns=pd.MultiIndex.from_tuples([['Open', 'a'], ['Open', 'b'], 
                                                     ['Close', 'a'], ['Close', 'b']], 
                                                   names=('lv1', 'lv2')), 
                 index=pd.date_range(end='2020-06-12', periods=10, freq='D'))
#add the columns
df[[('New',tc) for tc in df['Close'].columns]] = df['Close'].pct_change()

print (df)
lv1             Open               Close                    New          
lv2                a         b         a         b            a         b
2020-06-03  0.417022  0.720324  0.000114  0.302333          NaN       NaN
2020-06-04  0.146756  0.092339  0.186260  0.345561  1627.507181  0.142982
2020-06-05  0.396767  0.538817  0.419195  0.685220     1.250585  0.982921
2020-06-06  0.204452  0.878117  0.027388  0.670468    -0.934666 -0.021529
2020-06-07  0.417305  0.558690  0.140387  0.198101     4.125932 -0.704532
2020-06-08  0.800745  0.968262  0.313424  0.692323     1.232574  2.494788
2020-06-09  0.876389  0.894607  0.085044  0.039055    -0.728661 -0.943589
2020-06-10  0.169830  0.878143  0.098347  0.421108     0.156420  9.782485
2020-06-11  0.957890  0.533165  0.691877  0.315516     6.035073 -0.250748
2020-06-12  0.686501  0.834626  0.018288  0.750144    -0.973567  1.377519

#see it is well structure
print (df.columns.levels)
FrozenList([['Close', 'Open', 'New'], ['a', 'b']])

Answer 1

如果要在加载网络之前显示alert，可以在head标签中链接脚本文件夹，并创建一个显示警报的功能。