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When called as a script with arguments, this compiles the directories
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See module py_compile for details of the actual byte-compilation.
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dir: the directory to byte-compile
maxlevels: maximum recursion level (default 10)
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file as it is compiled into each byte-code file.
force: if True, force compilation, even if timestamps are up-to-date
quiet: full output with False or 0, errors only with 1,
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legacy: if True, produce legacy pyc paths instead of PEP 3147 paths
optimize: optimization level or -1 for level of the interpreter
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