how to check if one of chars in string is not a letter python code example

Example 1: python check if character is letter

>>> 'A'.isalpha()
True
>>> '1'.isalpha()
False

Example 2: python if string contains char

myString = "<text contains this>"
myOtherString = "AnotherString"

# Casting to string is not needed but it's good practice
# to check for errors 

if str(myString) in str(myOtherString): 
    # Do Something
else:
	# myOtherString didn't contain myString