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x
 
import re
txt = "The rain in Spain"
#Check if the string has other characters than a, r, or n:
x = re.findall("[^arn]", txt)
print(x)
if x:
  print("Yes, there is at least one match!")
else:
  print("No match")
['T', 'h', 'e', ' ', 'i', ' ', 'i', ' ', 'S', 'p', 'i']
Yes, there is at least one match!