code: def main():
      base_branch = get_base_branch()
      file_paths = changed_files(base_branch)
      python_files = [fn for fn in file_paths if fn.endswith(".py")]
      c_files = [fn for fn in file_paths if fn.endswith((".c", ".h"))]
      doc_files = [
          fn
          for fn in file_paths
          if fn.startswith("Doc") and fn.endswith((".rst", ".inc"))
      ]
      misc_files = {p for p in file_paths if p.startswith("Misc")}
      # PEP 8 whitespace rules enforcement.
      normalize_whitespace(python_files)
      # C rules enforcement.
      normalize_c_whitespace(c_files)
      # Docs updated.
      docs_modified(doc_files)
      # Misc/ACKS changed.
      credit_given(misc_files)
      # Misc/NEWS changed.
      reported_news(misc_files)
      # Regenerated configure, if necessary.
      regenerated_configure(file_paths)
      # Regenerated pyconfig.h.in, if necessary.
      regenerated_pyconfig_h_in(file_paths)
  
      # Test suite run and passed.
      if python_files or c_files:
          end = " and check for refleaks?" if c_files else "?"
          print()
          print("Did you run the test suite" + end)
  
imports: import re
  import sys
  import shutil
  import os.path
  import subprocess
  import sysconfig
  import reindent
  import untabify
label_desc: Use image node_id 18 for calling a global function with example usage: main() without return types