old_contents: """
  wiki: https://en.wikipedia.org/wiki/Pangram
  """
  
  
  def check_pangram(
      input_str: str = "The quick brown fox jumps over the lazy dog",
  ) -> bool:
      """
      A Pangram String contains all the alphabets at least once.
      >>> check_pangram("The quick brown fox jumps over the lazy dog")
      True
      >>> check_pangram("Waltz, bad nymph, for quick jigs vex.")
      True
      >>> check_pangram("Jived fox nymph grabs quick waltz.")
      True
      >>> check_pangram("My name is Unknown")
      False
      >>> check_pangram("The quick brown fox jumps over the la_y dog")
      False
      >>> check_pangram()
      True
      """
      frequency = set()
      input_str = input_str.replace(
          " ", ""
      )  # Replacing all the Whitespaces in our sentence
      for alpha in input_str:
          if "a" <= alpha.lower() <= "z":
              frequency.add(alpha.lower())
  
      return True if len(frequency) == 26 else False
  
  
  def check_pangram_faster(
      input_str: str = "The quick brown fox jumps over the lazy dog",
  ) -> bool:
      """
      >>> check_pangram_faster("The quick brown fox jumps over the lazy dog")
      True
      >>> check_pangram("Waltz, bad nymph, for quick jigs vex.")
      True
      >>> check_pangram("Jived fox nymph grabs quick waltz.")
      True
      >>> check_pangram_faster("The quick brown fox jumps over the la_y dog")
      False
      >>> check_pangram_faster()
      True
      """
      flag = [False] * 26
      for char in input_str:
          if char.islower():
              flag[ord(char) - ord("a")] = True
      return all(flag)
  
  
  def benchmark() -> None:
      """
      Benchmark code comparing different version.
      """
      from timeit import timeit
  
      setup = "from __main__ import check_pangram, check_pangram_faster"
      print(timeit("check_pangram()", setup=setup))
      print(timeit("check_pangram_faster()", setup=setup))
  
  
  if __name__ == "__main__":
      import doctest
  
      doctest.testmod()
      benchmark()
  
new_contents: """
  wiki: https://en.wikipedia.org/wiki/Pangram
  """
  
  
  def check_pangram(
      input_str: str = "The quick brown fox jumps over the lazy dog",
  ) -> bool:
      """
      A Pangram String contains all the alphabets at least once.
      >>> check_pangram("The quick brown fox jumps over the lazy dog")
      True
      >>> check_pangram("Waltz, bad nymph, for quick jigs vex.")
      True
      >>> check_pangram("Jived fox nymph grabs quick waltz.")
      True
      >>> check_pangram("My name is Unknown")
      False
      >>> check_pangram("The quick brown fox jumps over the la_y dog")
      False
      >>> check_pangram()
      True
      """
      frequency = set()
      input_str = input_str.replace(
          " ", ""
      )  # Replacing all the Whitespaces in our sentence
      for alpha in input_str:
          if "a" <= alpha.lower() <= "z":
              frequency.add(alpha.lower())
  
      return True if len(frequency) == 26 else False
  
  
  def check_pangram_faster(
      input_str: str = "The quick brown fox jumps over the lazy dog",
  ) -> bool:
      """
      >>> check_pangram_faster("The quick brown fox jumps over the lazy dog")
      True
      >>> check_pangram_faster("Waltz, bad nymph, for quick jigs vex.")
      True
      >>> check_pangram_faster("Jived fox nymph grabs quick waltz.")
      True
      >>> check_pangram_faster("The quick brown fox jumps over the la_y dog")
      False
      >>> check_pangram_faster()
      True
      """
      flag = [False] * 26
      for char in input_str:
          if char.islower():
              flag[ord(char) - 97] = True
          elif char.isupper():
              flag[ord(char) - 65] = True
      return all(flag)
  
  
  def benchmark() -> None:
      """
      Benchmark code comparing different version.
      """
      from timeit import timeit
  
      setup = "from __main__ import check_pangram, check_pangram_faster"
      print(timeit("check_pangram()", setup=setup))
      print(timeit("check_pangram_faster()", setup=setup))
  
  
  if __name__ == "__main__":
      import doctest
  
      doctest.testmod()
      benchmark()
  
subject: Create check_pangram.py (#4389)