input: Write a function to check if a given string contains any numbers. Return True if the string contains at least one number, otherwise return False.
  
  def string_contains_number(string):
      import re
      pattern = re.compile("[0-9]") 
      return pattern.search(string) != None
  
  assert string_contains_number("Hello123")==True
  assert string_contains_number("123Hello")==True
  assert string_contains_number("HelloWorld")==False
  assert string_contains_number("H3llo")==True
  assert string_contains_number("")==False
output: def string_contains_number(string):
      import re
      pattern = re.compile("[0-9]") 
      return pattern.search(string) != None