code: def sequential_filenames():
      """
      Generate filenames for the tests
      """
      for i in range(100):
          yield Path(f"filename-{i}.png")
  
imports: import warnings
  from pathlib import Path
  import matplotlib.pyplot
  import pandas
  import pytest
  from plotnine import aes, facet_wrap, geom_point, geom_text, ggplot, ggsave, theme_xkcd
  from plotnine.data import mtcars
  from plotnine.exceptions import PlotnineError, PlotnineWarning
label_desc: Use image node_id 1 for calling a global function with example usage: sequential_filenames() without return types