Checking the type for multi and single dimensional arrays Pandas Python

I want to check if the Multi and Single are of type float or string. How would I be able to check the type of multi dimensional arrays and single dimensional arrays.

csv file:

Multi,Single    
[[20]|[yes]],[35|50]

Code:

import pandas pd

check = pd.read_csv("file.csv")
if (not isinstance(check["Multi"], (float, int))):
    print(f'Invalid value: {check["Multi"]} must be int or float')

if (not isinstance(check["Single"], (float, int))):
    print(f'Invalid value: {check["Single"]} must be int or float')

Error:

Invalid value: [[20]|[yes]] must be int or float