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bpo-43202: More codeop._maybe_compile clean-ups (GH-24512)
Add comment, end others with period, remove unused variables, initialize others only when needed, and add explicit return.
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@ -64,24 +64,21 @@
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__all__ = ["compile_command", "Compile", "CommandCompiler"]
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PyCF_DONT_IMPLY_DEDENT = 0x200 # Matches pythonrun.h
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PyCF_DONT_IMPLY_DEDENT = 0x200 # Matches pythonrun.h.
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def _maybe_compile(compiler, source, filename, symbol):
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# Check for source consisting of only blank lines and comments
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# Check for source consisting of only blank lines and comments.
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for line in source.split("\n"):
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line = line.strip()
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if line and line[0] != '#':
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break # Leave it alone
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break # Leave it alone.
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else:
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if symbol != "eval":
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source = "pass" # Replace it with a 'pass' statement
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err = err1 = err2 = None
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code1 = code2 = None
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try:
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return compiler(source, filename, symbol)
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except SyntaxError:
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except SyntaxError: # Let other compile() errors propagate.
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pass
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# Catch syntax warnings after the first compile
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@ -89,6 +86,7 @@ def _maybe_compile(compiler, source, filename, symbol):
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with warnings.catch_warnings():
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warnings.simplefilter("error")
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code1 = err1 = err2 = None
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try:
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code1 = compiler(source + "\n", filename, symbol)
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except SyntaxError as e:
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@ -102,6 +100,8 @@ def _maybe_compile(compiler, source, filename, symbol):
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try:
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if not code1 and _is_syntax_error(err1, err2):
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raise err1
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else:
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return None
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finally:
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err1 = err2 = None
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