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Rev 9370 Rev 9411
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import shutil
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def log(s, end = "\n"):
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def log(s, end = "\n"):
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    print(s, end = end, flush = True)
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    print(s, end = end, flush = True)
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def require_tools(names):
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    assert(type(names) == list or type(names) == tuple)
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    for name in names:
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        assert(type(name) == str)
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    not_found = []
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    for name in names:
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        if shutil.which(name) is None:
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            not_found.append(name)
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    if len(not_found) != 0:
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        log("Sorry, I can't find some tools:")
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        for name in not_found:
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            print(f"- {name}")