Python if statement retrieving "The truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all()."

I have 2 datasets, a list r and a dataframe df.

r = [1,1,1,1,1,1,1,1,2,2,2,2,2,1]

df

|----|----|----|----|----|----|----|----|----|----|
| d1 | d2 | d3 | d4 | d5 | d6 | d7 | d8 | d9 | d10|
|----|----|----|----|----|----|----|----|----|----|
|  0 |  0 |  1 |  0 |  0 |  1 |  1 |  0 |  1 |  1 |
|  1 |  0 |  1 |  1 |  0 |  0 |  1 |  1 |  1 |  1 |
|  1 |  1 |  0 |  1 |  1 |  0 |  1 |  0 |  0 |  0 |
|  0 |  0 |  0 |  1 |  0 |  1 |  1 |  1 |  1 |  1 |

I am trying to run an if statement that evaluates the selection of a random value from df vs r. However I get an error.

The post in this link kind of exposes the problem and I did tried the methods but doesn't seem to be working.

I tried to used the methods proposed in the link above and in the error (.any() , .all(), .bool()) but don't see to get it working.

df1 = df.sample(n=1)
if(df1 <= r):
    df
    r-=df