author | Manuel Jacob <me@manueljacob.de> |
Tue, 31 May 2022 02:19:07 +0200 | |
changeset 49297 | 402f9f0f9387 |
parent 48875 | 6000f5b25c9b |
child 49556 | 9172bd49cedc |
permissions | -rwxr-xr-x |
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global: use python3 in shebangs
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#!/usr/bin/env python3 |
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""" |
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Utility for inspecting files in various ways. |
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This tool is like the collection of tools found in a unix environment but are |
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cross platform and stable and suitable for our needs in the test suite. |
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This can be used instead of tools like: |
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[ |
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dd |
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find |
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head |
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hexdump |
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ls |
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md5sum |
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readlink |
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sha1sum |
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stat |
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tail |
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test |
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readlink.py |
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md5sum.py |
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""" |
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import binascii |
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import glob |
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import hashlib |
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import optparse |
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import os |
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import re |
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import sys |
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# Python 3 adapters |
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ispy3 = sys.version_info[0] >= 3 |
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if ispy3: |
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def iterbytes(s): |
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for i in range(len(s)): |
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yield s[i : i + 1] |
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else: |
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iterbytes = iter |
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def visit(opts, filenames, outfile): |
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"""Process filenames in the way specified in opts, writing output to |
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outfile.""" |
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for f in sorted(filenames): |
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isstdin = f == '-' |
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if not isstdin and not os.path.lexists(f): |
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outfile.write(b'%s: file not found\n' % f.encode('utf-8')) |
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continue |
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quiet = opts.quiet and not opts.recurse or isstdin |
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isdir = os.path.isdir(f) |
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islink = os.path.islink(f) |
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isfile = os.path.isfile(f) and not islink |
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dirfiles = None |
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content = None |
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facts = [] |
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if isfile: |
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if opts.type: |
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facts.append(b'file') |
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if any((opts.hexdump, opts.dump, opts.md5, opts.sha1, opts.sha256)): |
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with open(f, 'rb') as fobj: |
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content = fobj.read() |
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elif islink: |
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if opts.type: |
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facts.append(b'link') |
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content = os.readlink(f).encode('utf8') |
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elif isstdin: |
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content = getattr(sys.stdin, 'buffer', sys.stdin).read() |
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if opts.size: |
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facts.append(b'size=%d' % len(content)) |
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elif isdir: |
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if opts.recurse or opts.type: |
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dirfiles = glob.glob(f + '/*') |
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facts.append(b'directory with %d files' % len(dirfiles)) |
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elif opts.type: |
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facts.append(b'type unknown') |
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if not isstdin: |
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stat = os.lstat(f) |
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if opts.size and not isdir: |
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facts.append(b'size=%d' % stat.st_size) |
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if opts.mode and not islink: |
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facts.append(b'mode=%o' % (stat.st_mode & 0o777)) |
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if opts.links: |
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facts.append(b'links=%d' % stat.st_nlink) |
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if opts.newer: |
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# mtime might be in whole seconds so newer file might be same |
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if stat.st_mtime >= os.stat(opts.newer).st_mtime: |
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facts.append( |
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b'newer than %s' % opts.newer.encode('utf8', 'replace') |
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) |
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else: |
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facts.append( |
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b'older than %s' % opts.newer.encode('utf8', 'replace') |
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) |
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if opts.md5 and content is not None: |
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h = hashlib.md5(content) |
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facts.append(b'md5=%s' % binascii.hexlify(h.digest())[: opts.bytes]) |
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if opts.sha1 and content is not None: |
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h = hashlib.sha1(content) |
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facts.append( |
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b'sha1=%s' % binascii.hexlify(h.digest())[: opts.bytes] |
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) |
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if opts.sha256 and content is not None: |
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h = hashlib.sha256(content) |
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facts.append( |
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b'sha256=%s' % binascii.hexlify(h.digest())[: opts.bytes] |
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if isstdin: |
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outfile.write(b', '.join(facts) + b'\n') |
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elif facts: |
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outfile.write(b'%s: %s\n' % (f.encode('utf-8'), b', '.join(facts))) |
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elif not quiet: |
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outfile.write(b'%s:\n' % f.encode('utf-8')) |
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if content is not None: |
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chunk = content |
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if not islink: |
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if opts.lines: |
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if opts.lines >= 0: |
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chunk = b''.join(chunk.splitlines(True)[: opts.lines]) |
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else: |
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chunk = b''.join(chunk.splitlines(True)[opts.lines :]) |
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if opts.bytes: |
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if opts.bytes >= 0: |
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chunk = chunk[: opts.bytes] |
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else: |
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chunk = chunk[opts.bytes :] |
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if opts.hexdump: |
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for i in range(0, len(chunk), 16): |
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s = chunk[i : i + 16] |
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outfile.write( |
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b'%04x: %-47s |%s|\n' |
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% ( |
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i, |
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b' '.join(b'%02x' % ord(c) for c in iterbytes(s)), |
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re.sub(b'[^ -~]', b'.', s), |
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) |
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) |
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if opts.dump: |
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if not quiet: |
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outfile.write(b'>>>\n') |
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outfile.write(chunk) |
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if not quiet: |
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if chunk.endswith(b'\n'): |
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outfile.write(b'<<<\n') |
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else: |
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outfile.write(b'\n<<< no trailing newline\n') |
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if opts.recurse and dirfiles: |
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assert not isstdin |
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visit(opts, dirfiles, outfile) |
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|
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|
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if __name__ == "__main__": |
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parser = optparse.OptionParser("%prog [options] [filenames]") |
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parser.add_option( |
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"-t", |
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"--type", |
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action="store_true", |
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help="show file type (file or directory)", |
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parser.add_option( |
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"-m", "--mode", action="store_true", help="show file mode" |
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parser.add_option( |
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"-l", "--links", action="store_true", help="show number of links" |
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parser.add_option( |
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"-s", "--size", action="store_true", help="show size of file" |
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parser.add_option( |
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"-n", "--newer", action="store", help="check if file is newer (or same)" |
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parser.add_option( |
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"-r", "--recurse", action="store_true", help="recurse into directories" |
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parser.add_option( |
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"-S", |
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"--sha1", |
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action="store_true", |
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help="show sha1 hash of the content", |
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parser.add_option( |
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"", |
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"--sha256", |
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action="store_true", |
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help="show sha256 hash of the content", |
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) |
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parser.add_option( |
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"-M", "--md5", action="store_true", help="show md5 hash of the content" |
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parser.add_option( |
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"-D", "--dump", action="store_true", help="dump file content" |
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parser.add_option( |
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"-H", "--hexdump", action="store_true", help="hexdump file content" |
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parser.add_option( |
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"-B", "--bytes", type="int", help="number of characters to dump" |
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parser.add_option( |
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"-L", "--lines", type="int", help="number of lines to dump" |
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parser.add_option( |
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"-q", "--quiet", action="store_true", help="no default output" |
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) |
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(opts, filenames) = parser.parse_args(sys.argv[1:]) |
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if not filenames: |
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filenames = ['-'] |
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|
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215 |
visit(opts, filenames, getattr(sys.stdout, 'buffer', sys.stdout)) |