code: def show_patterned_file(dir_path, pattern=list(), filename_only=True):
          
          pattern = [i.lower() for i in pattern]
          if filename_only:
              def filter(winfile):
                  for p in pattern:
                      if p in winfile.fname.lower():
                          return True
                  return False
          else:
              def filter(winfile):
                  for p in pattern:
                      if p in winfile.abspath.lower():
                          return True
                  return False
          
          fc = FileCollection.from_path_by_criterion(
              dir_path, filter, keepboth=False)
          if filename_only:
              fc.sort_by("fname")
          else:
              fc.sort_by("abspath")
              
          table = {p: "<%s>" % p for p in pattern}
          lines = list()
          lines.append("Results:")
          for winfile in fc.iterfiles():
              lines.append("  %s" % winfile)
              
          if filename_only:
              lines.append("Above are all files that file name contains %s" % pattern)
          else:
              lines.append("Above are all files that abspath contains %s" % pattern)
              
          text = "\n".join(lines)
          print(text)
          with open("__show_patterned_file__.log", "wb") as f:
              f.write(text.encode("utf-8"))
docs: Print all file that file name contains ``pattern``.