pyflakes Error in Spyder 5.3.3

[Arun NY]

I have a simple code that says I have a syntax error (pyflakes E). The same code does not produce an error in :VScode:

name = input('whose borthday?')
if name not IN myList:
    print(name +' does not exist')

changing the IN from capitals to lowercase gives no error.  Is there anything I can do to ensure this is not treated as syntax error in Spyder?

Arun