FM / python3.11

/opt/alt/python311/lib64/python3.11

Name	Size	Mode	Actions
asyncio/	-	0755	rm
collections/	-	0755	rm
concurrent/	-	0755	rm
config-3.11-x86_64-linux-gnu/	-	0755	rm
ctypes/	-	0755	rm
curses/	-	0755	rm
dbm/	-	0755	rm
distutils/	-	0755	rm
email/	-	0755	rm
encodings/	-	0755	rm
ensurepip/	-	0755	rm
html/	-	0755	rm
http/	-	0755	rm
importlib/	-	0755	rm
json/	-	0755	rm
lib-dynload/	-	0755	rm
lib2to3/	-	0755	rm
logging/	-	0755	rm
multiprocessing/	-	0755	rm
pydoc_data/	-	0755	rm
re/	-	0755	rm
site-packages/	-	0755	rm
sqlite3/	-	0755	rm
tomllib/	-	0755	rm
unittest/	-	0755	rm
urllib/	-	0755	rm
venv/	-	0755	rm
wsgiref/	-	0755	rm
xml/	-	0755	rm
xmlrpc/	-	0755	rm
zoneinfo/	-	0755	rm
__phello__/	-	0755	rm
__pycache__/	-	0755	rm
abc.py	6538	0644	edit dl rm
aifc.py	34211	0644	edit dl rm
antigravity.py	500	0644	edit dl rm
argparse.py	100283	0644	edit dl rm
ast.py	61444	0644	edit dl rm
asynchat.py	11570	0644	edit dl rm
asyncore.py	20310	0644	edit dl rm
base64.py	21041	0755	edit dl rm
bdb.py	32463	0644	edit dl rm
bisect.py	3135	0644	edit dl rm
bz2.py	11847	0644	edit dl rm
calendar.py	24731	0644	edit dl rm
cgi.py	34432	0755	edit dl rm
cgitb.py	12421	0644	edit dl rm
chunk.py	5500	0644	edit dl rm
cmd.py	14873	0644	edit dl rm
code.py	10622	0644	edit dl rm
codecs.py	37150	0644	edit dl rm
codeop.py	5907	0644	edit dl rm
colorsys.py	4062	0644	edit dl rm
compileall.py	20252	0644	edit dl rm
configparser.py	55660	0644	edit dl rm
contextlib.py	27414	0644	edit dl rm
contextvars.py	129	0644	edit dl rm
copy.py	8681	0644	edit dl rm
copyreg.py	7677	0644	edit dl rm
cProfile.py	6359	0755	edit dl rm
crypt.py	3913	0644	edit dl rm
csv.py	16030	0644	edit dl rm
dataclasses.py	58472	0644	edit dl rm
datetime.py	91832	0644	edit dl rm
decimal.py	320	0644	edit dl rm
difflib.py	83308	0644	edit dl rm
dis.py	28906	0644	edit dl rm
doctest.py	106297	0644	edit dl rm
enum.py	79583	0644	edit dl rm
filecmp.py	10178	0644	edit dl rm
fileinput.py	15714	0644	edit dl rm
fnmatch.py	5999	0644	edit dl rm
fractions.py	28677	0644	edit dl rm
ftplib.py	35815	0644	edit dl rm
functools.py	38413	0644	edit dl rm
genericpath.py	4975	0644	edit dl rm
getopt.py	7489	0644	edit dl rm
getpass.py	5990	0644	edit dl rm
gettext.py	21320	0644	edit dl rm
glob.py	8732	0644	edit dl rm
graphlib.py	9656	0644	edit dl rm
gzip.py	24074	0644	edit dl rm
hashlib.py	11765	0644	edit dl rm
heapq.py	23024	0644	edit dl rm
hmac.py	7716	0644	edit dl rm
imaplib.py	55217	0644	edit dl rm
imghdr.py	3952	0644	edit dl rm
imp.py	10606	0644	edit dl rm
inspect.py	123419	0644	edit dl rm
io.py	4320	0644	edit dl rm
ipaddress.py	79124	0644	edit dl rm
keyword.py	1061	0644	edit dl rm
LICENSE.txt	13936	0644	edit dl rm
linecache.py	5649	0644	edit dl rm
locale.py	79095	0644	edit dl rm
lzma.py	13277	0644	edit dl rm
mailbox.py	78830	0644	edit dl rm
mailcap.py	9369	0644	edit dl rm
mimetypes.py	22962	0644	edit dl rm
modulefinder.py	23699	0644	edit dl rm
netrc.py	6929	0644	edit dl rm
nntplib.py	41087	0644	edit dl rm
ntpath.py	30222	0644	edit dl rm
nturl2path.py	2887	0644	edit dl rm
numbers.py	10348	0644	edit dl rm
opcode.py	10447	0644	edit dl rm
operator.py	10965	0644	edit dl rm
optparse.py	60369	0644	edit dl rm
os.py	39530	0644	edit dl rm
pathlib.py	48566	0644	edit dl rm
pdb.py	64186	0755	edit dl rm
pickle.py	65132	0644	edit dl rm
pickletools.py	93861	0644	edit dl rm
pipes.py	8978	0644	edit dl rm
pkgutil.py	24638	0644	edit dl rm
platform.py	42287	0755	edit dl rm
plistlib.py	28354	0644	edit dl rm
poplib.py	15198	0644	edit dl rm
posixpath.py	17013	0644	edit dl rm
pprint.py	24583	0644	edit dl rm
profile.py	22896	0755	edit dl rm
pstats.py	29356	0644	edit dl rm
pty.py	6317	0644	edit dl rm
pyclbr.py	11396	0644	edit dl rm
pydoc.py	112664	0755	edit dl rm
py_compile.py	7837	0644	edit dl rm
queue.py	11496	0644	edit dl rm
quopri.py	7281	0755	edit dl rm
random.py	32162	0644	edit dl rm
reprlib.py	5437	0644	edit dl rm
rlcompleter.py	7827	0644	edit dl rm
runpy.py	13159	0644	edit dl rm
sched.py	6351	0644	edit dl rm
secrets.py	2028	0644	edit dl rm
selectors.py	19671	0644	edit dl rm
shelve.py	8560	0644	edit dl rm
shlex.py	13501	0644	edit dl rm
shutil.py	56517	0644	edit dl rm
signal.py	2495	0644	edit dl rm
site.py	22987	0644	edit dl rm
smtpd.py	31175	0755	edit dl rm
smtplib.py	45431	0755	edit dl rm
sndhdr.py	7448	0644	edit dl rm
socket.py	37557	0644	edit dl rm
socketserver.py	27586	0644	edit dl rm
sre_compile.py	231	0644	edit dl rm
sre_constants.py	232	0644	edit dl rm
sre_parse.py	229	0644	edit dl rm
ssl.py	54305	0644	edit dl rm
stat.py	5485	0644	edit dl rm
statistics.py	47705	0644	edit dl rm
string.py	11786	0644	edit dl rm
stringprep.py	12917	0644	edit dl rm
struct.py	257	0644	edit dl rm
subprocess.py	88725	0644	edit dl rm
sunau.py	18480	0644	edit dl rm
symtable.py	10368	0644	edit dl rm
sysconfig.py	30315	0644	edit dl rm
tabnanny.py	11312	0755	edit dl rm
tarfile.py	107876	0755	edit dl rm
telnetlib.py	23301	0644	edit dl rm
tempfile.py	31873	0644	edit dl rm
textwrap.py	19718	0644	edit dl rm
this.py	1003	0644	edit dl rm
threading.py	58231	0644	edit dl rm
timeit.py	13532	0755	edit dl rm
token.py	2386	0644	edit dl rm
tokenize.py	26336	0644	edit dl rm
trace.py	29196	0755	edit dl rm
traceback.py	40547	0644	edit dl rm
tracemalloc.py	18047	0644	edit dl rm
tty.py	879	0644	edit dl rm
types.py	10067	0644	edit dl rm
typing.py	120951	0644	edit dl rm
uu.py	7341	0644	edit dl rm
uuid.py	27597	0644	edit dl rm
warnings.py	21110	0644	edit dl rm
wave.py	21818	0644	edit dl rm
weakref.py	21513	0644	edit dl rm
webbrowser.py	25149	0755	edit dl rm
xdrlib.py	5977	0644	edit dl rm
zipapp.py	7535	0644	edit dl rm
zipfile.py	93788	0644	edit dl rm
zipimport.py	30897	0644	edit dl rm
_aix_support.py	3389	0644	edit dl rm
_bootsubprocess.py	2675	0644	edit dl rm
_collections_abc.py	30193	0644	edit dl rm
_compat_pickle.py	8761	0644	edit dl rm
_compression.py	5681	0644	edit dl rm
_markupbase.py	14653	0644	edit dl rm
_osx_support.py	22023	0644	edit dl rm
_pydecimal.py	229202	0644	edit dl rm
_pyio.py	94193	0644	edit dl rm
_py_abc.py	6189	0644	edit dl rm
_sitebuiltins.py	3128	0644	edit dl rm
_strptime.py	25175	0644	edit dl rm
_sysconfigdata_d_linux_x86_64-linux-gnu.py	58878	0644	edit dl rm
_sysconfigdata__linux_x86_64-linux-gnu.py	59645	0644	edit dl rm
_threading_local.py	7220	0644	edit dl rm
_weakrefset.py	5893	0644	edit dl rm
__future__.py	5218	0644	edit dl rm
__hello__.py	227	0644	edit dl rm

Edit: /opt/alt/python311/lib64/python3.11/wave.py (21818B)

"""Stuff to parse WAVE files.

Usage.

Reading WAVE files:
      f = wave.open(file, 'r')
where file is either the name of a file or an open file pointer.
The open file pointer must have methods read(), seek(), and close().
When the setpos() and rewind() methods are not used, the seek()
method is not  necessary.

This returns an instance of a class with the following public methods:
      getnchannels()  -- returns number of audio channels (1 for
                         mono, 2 for stereo)
      getsampwidth()  -- returns sample width in bytes
      getframerate()  -- returns sampling frequency
      getnframes()    -- returns number of audio frames
      getcomptype()   -- returns compression type ('NONE' for linear samples)
      getcompname()   -- returns human-readable version of
                         compression type ('not compressed' linear samples)
      getparams()     -- returns a namedtuple consisting of all of the
                         above in the above order
      getmarkers()    -- returns None (for compatibility with the
                         aifc module)
      getmark(id)     -- raises an error since the mark does not
                         exist (for compatibility with the aifc module)
      readframes(n)   -- returns at most n frames of audio
      rewind()        -- rewind to the beginning of the audio stream
      setpos(pos)     -- seek to the specified position
      tell()          -- return the current position
      close()         -- close the instance (make it unusable)
The position returned by tell() and the position given to setpos()
are compatible and have nothing to do with the actual position in the
file.
The close() method is called automatically when the class instance
is destroyed.

Writing WAVE files:
      f = wave.open(file, 'w')
where file is either the name of a file or an open file pointer.
The open file pointer must have methods write(), tell(), seek(), and
close().

This returns an instance of a class with the following public methods:
      setnchannels(n) -- set the number of channels
      setsampwidth(n) -- set the sample width
      setframerate(n) -- set the frame rate
      setnframes(n)   -- set the number of frames
      setcomptype(type, name)
                      -- set the compression type and the
                         human-readable compression type
      setparams(tuple)
                      -- set all parameters at once
      tell()          -- return current position in output file
      writeframesraw(data)
                      -- write audio frames without patching up the
                         file header
      writeframes(data)
                      -- write audio frames and patch up the file header
      close()         -- patch up the file header and close the
                         output file
You should set the parameters before the first writeframesraw or
writeframes.  The total number of frames does not need to be set,
but when it is set to the correct value, the header does not have to
be patched up.
It is best to first set all parameters, perhaps possibly the
compression type, and then write audio frames using writeframesraw.
When all frames have been written, either call writeframes(b'') or
close() to patch up the sizes in the header.
The close() method is called automatically when the class instance
is destroyed.
"""

from collections import namedtuple
import builtins
import struct
import sys

__all__ = ["open", "Error", "Wave_read", "Wave_write"]

class Error(Exception):
    pass

WAVE_FORMAT_PCM = 0x0001

_array_fmts = None, 'b', 'h', None, 'i'

_wave_params = namedtuple('_wave_params',
                     'nchannels sampwidth framerate nframes comptype compname')

def _byteswap(data, width):
    swapped_data = bytearray(len(data))

for i in range(0, len(data), width):
        for j in range(width):
            swapped_data[i + width - 1 - j] = data[i + j]

return bytes(swapped_data)

class _Chunk:
    def __init__(self, file, align=True, bigendian=True, inclheader=False):
        self.closed = False
        self.align = align      # whether to align to word (2-byte) boundaries
        if bigendian:
            strflag = '>'
        else:
            strflag = '<'
        self.file = file
        self.chunkname = file.read(4)
        if len(self.chunkname) < 4:
            raise EOFError
        try:
            self.chunksize = struct.unpack_from(strflag+'L', file.read(4))[0]
        except struct.error:
            raise EOFError from None
        if inclheader:
            self.chunksize = self.chunksize - 8 # subtract header
        self.size_read = 0
        try:
            self.offset = self.file.tell()
        except (AttributeError, OSError):
            self.seekable = False
        else:
            self.seekable = True

def getname(self):
        """Return the name (ID) of the current chunk."""
        return self.chunkname

def close(self):
        if not self.closed:
            try:
                self.skip()
            finally:
                self.closed = True

def seek(self, pos, whence=0):
        """Seek to specified position into the chunk.
        Default position is 0 (start of chunk).
        If the file is not seekable, this will result in an error.
        """

if self.closed:
            raise ValueError("I/O operation on closed file")
        if not self.seekable:
            raise OSError("cannot seek")
        if whence == 1:
            pos = pos + self.size_read
        elif whence == 2:
            pos = pos + self.chunksize
        if pos < 0 or pos > self.chunksize:
            raise RuntimeError
        self.file.seek(self.offset + pos, 0)
        self.size_read = pos

def tell(self):
        if self.closed:
            raise ValueError("I/O operation on closed file")
        return self.size_read

def read(self, size=-1):
        """Read at most size bytes from the chunk.
        If size is omitted or negative, read until the end
        of the chunk.
        """

if self.closed:
            raise ValueError("I/O operation on closed file")
        if self.size_read >= self.chunksize:
            return b''
        if size < 0:
            size = self.chunksize - self.size_read
        if size > self.chunksize - self.size_read:
            size = self.chunksize - self.size_read
        data = self.file.read(size)
        self.size_read = self.size_read + len(data)
        if self.size_read == self.chunksize and \
           self.align and \
           (self.chunksize & 1):
            dummy = self.file.read(1)
            self.size_read = self.size_read + len(dummy)
        return data

def skip(self):
        """Skip the rest of the chunk.
        If you are not interested in the contents of the chunk,
        this method should be called so that the file points to
        the start of the next chunk.
        """

if self.closed:
            raise ValueError("I/O operation on closed file")
        if self.seekable:
            try:
                n = self.chunksize - self.size_read
                # maybe fix alignment
                if self.align and (self.chunksize & 1):
                    n = n + 1
                self.file.seek(n, 1)
                self.size_read = self.size_read + n
                return
            except OSError:
                pass
        while self.size_read < self.chunksize:
            n = min(8192, self.chunksize - self.size_read)
            dummy = self.read(n)
            if not dummy:
                raise EOFError

class Wave_read:
    """Variables used in this class:

These variables are available to the user though appropriate
    methods of this class:
    _file -- the open file with methods read(), close(), and seek()
              set through the __init__() method
    _nchannels -- the number of audio channels
              available through the getnchannels() method
    _nframes -- the number of audio frames
              available through the getnframes() method
    _sampwidth -- the number of bytes per audio sample
              available through the getsampwidth() method
    _framerate -- the sampling frequency
              available through the getframerate() method
    _comptype -- the AIFF-C compression type ('NONE' if AIFF)
              available through the getcomptype() method
    _compname -- the human-readable AIFF-C compression type
              available through the getcomptype() method
    _soundpos -- the position in the audio stream
              available through the tell() method, set through the
              setpos() method

These variables are used internally only:
    _fmt_chunk_read -- 1 iff the FMT chunk has been read
    _data_seek_needed -- 1 iff positioned correctly in audio
              file for readframes()
    _data_chunk -- instantiation of a chunk class for the DATA chunk
    _framesize -- size of one frame in the file
    """

def initfp(self, file):
        self._convert = None
        self._soundpos = 0
        self._file = _Chunk(file, bigendian = 0)
        if self._file.getname() != b'RIFF':
            raise Error('file does not start with RIFF id')
        if self._file.read(4) != b'WAVE':
            raise Error('not a WAVE file')
        self._fmt_chunk_read = 0
        self._data_chunk = None
        while 1:
            self._data_seek_needed = 1
            try:
                chunk = _Chunk(self._file, bigendian = 0)
            except EOFError:
                break
            chunkname = chunk.getname()
            if chunkname == b'fmt ':
                self._read_fmt_chunk(chunk)
                self._fmt_chunk_read = 1
            elif chunkname == b'data':
                if not self._fmt_chunk_read:
                    raise Error('data chunk before fmt chunk')
                self._data_chunk = chunk
                self._nframes = chunk.chunksize // self._framesize
                self._data_seek_needed = 0
                break
            chunk.skip()
        if not self._fmt_chunk_read or not self._data_chunk:
            raise Error('fmt chunk and/or data chunk missing')

def __init__(self, f):
        self._i_opened_the_file = None
        if isinstance(f, str):
            f = builtins.open(f, 'rb')
            self._i_opened_the_file = f
        # else, assume it is an open file object already
        try:
            self.initfp(f)
        except:
            if self._i_opened_the_file:
                f.close()
            raise

def __del__(self):
        self.close()

def __enter__(self):
        return self

def __exit__(self, *args):
        self.close()

#
    # User visible methods.
    #
    def getfp(self):
        return self._file

def rewind(self):
        self._data_seek_needed = 1
        self._soundpos = 0

def close(self):
        self._file = None
        file = self._i_opened_the_file
        if file:
            self._i_opened_the_file = None
            file.close()

def tell(self):
        return self._soundpos

def getnchannels(self):
        return self._nchannels

def getnframes(self):
        return self._nframes

def getsampwidth(self):
        return self._sampwidth

def getframerate(self):
        return self._framerate

def getcomptype(self):
        return self._comptype

def getcompname(self):
        return self._compname

def getparams(self):
        return _wave_params(self.getnchannels(), self.getsampwidth(),
                       self.getframerate(), self.getnframes(),
                       self.getcomptype(), self.getcompname())

def getmarkers(self):
        return None

def getmark(self, id):
        raise Error('no marks')

def setpos(self, pos):
        if pos < 0 or pos > self._nframes:
            raise Error('position not in range')
        self._soundpos = pos
        self._data_seek_needed = 1

def readframes(self, nframes):
        if self._data_seek_needed:
            self._data_chunk.seek(0, 0)
            pos = self._soundpos * self._framesize
            if pos:
                self._data_chunk.seek(pos, 0)
            self._data_seek_needed = 0
        if nframes == 0:
            return b''
        data = self._data_chunk.read(nframes * self._framesize)
        if self._sampwidth != 1 and sys.byteorder == 'big':
            data = _byteswap(data, self._sampwidth)
        if self._convert and data:
            data = self._convert(data)
        self._soundpos = self._soundpos + len(data) // (self._nchannels * self._sampwidth)
        return data

#
    # Internal methods.
    #

def _read_fmt_chunk(self, chunk):
        try:
            wFormatTag, self._nchannels, self._framerate, dwAvgBytesPerSec, wBlockAlign = struct.unpack_from('<HHLLH', chunk.read(14))
        except struct.error:
            raise EOFError from None
        if wFormatTag == WAVE_FORMAT_PCM:
            try:
                sampwidth = struct.unpack_from('<H', chunk.read(2))[0]
            except struct.error:
                raise EOFError from None
            self._sampwidth = (sampwidth + 7) // 8
            if not self._sampwidth:
                raise Error('bad sample width')
        else:
            raise Error('unknown format: %r' % (wFormatTag,))
        if not self._nchannels:
            raise Error('bad # of channels')
        self._framesize = self._nchannels * self._sampwidth
        self._comptype = 'NONE'
        self._compname = 'not compressed'

class Wave_write:
    """Variables used in this class:

These variables are user settable through appropriate methods
    of this class:
    _file -- the open file with methods write(), close(), tell(), seek()
              set through the __init__() method
    _comptype -- the AIFF-C compression type ('NONE' in AIFF)
              set through the setcomptype() or setparams() method
    _compname -- the human-readable AIFF-C compression type
              set through the setcomptype() or setparams() method
    _nchannels -- the number of audio channels
              set through the setnchannels() or setparams() method
    _sampwidth -- the number of bytes per audio sample
              set through the setsampwidth() or setparams() method
    _framerate -- the sampling frequency
              set through the setframerate() or setparams() method
    _nframes -- the number of audio frames written to the header
              set through the setnframes() or setparams() method

These variables are used internally only:
    _datalength -- the size of the audio samples written to the header
    _nframeswritten -- the number of frames actually written
    _datawritten -- the size of the audio samples actually written
    """

def __init__(self, f):
        self._i_opened_the_file = None
        if isinstance(f, str):
            f = builtins.open(f, 'wb')
            self._i_opened_the_file = f
        try:
            self.initfp(f)
        except:
            if self._i_opened_the_file:
                f.close()
            raise

def initfp(self, file):
        self._file = file
        self._convert = None
        self._nchannels = 0
        self._sampwidth = 0
        self._framerate = 0
        self._nframes = 0
        self._nframeswritten = 0
        self._datawritten = 0
        self._datalength = 0
        self._headerwritten = False

def __del__(self):
        self.close()

def __enter__(self):
        return self

def __exit__(self, *args):
        self.close()

#
    # User visible methods.
    #
    def setnchannels(self, nchannels):
        if self._datawritten:
            raise Error('cannot change parameters after starting to write')
        if nchannels < 1:
            raise Error('bad # of channels')
        self._nchannels = nchannels

def getnchannels(self):
        if not self._nchannels:
            raise Error('number of channels not set')
        return self._nchannels

def setsampwidth(self, sampwidth):
        if self._datawritten:
            raise Error('cannot change parameters after starting to write')
        if sampwidth < 1 or sampwidth > 4:
            raise Error('bad sample width')
        self._sampwidth = sampwidth

def getsampwidth(self):
        if not self._sampwidth:
            raise Error('sample width not set')
        return self._sampwidth

def setframerate(self, framerate):
        if self._datawritten:
            raise Error('cannot change parameters after starting to write')
        if framerate <= 0:
            raise Error('bad frame rate')
        self._framerate = int(round(framerate))

def getframerate(self):
        if not self._framerate:
            raise Error('frame rate not set')
        return self._framerate

def setnframes(self, nframes):
        if self._datawritten:
            raise Error('cannot change parameters after starting to write')
        self._nframes = nframes

def getnframes(self):
        return self._nframeswritten

def setcomptype(self, comptype, compname):
        if self._datawritten:
            raise Error('cannot change parameters after starting to write')
        if comptype not in ('NONE',):
            raise Error('unsupported compression type')
        self._comptype = comptype
        self._compname = compname

def getcomptype(self):
        return self._comptype

def getcompname(self):
        return self._compname

def setparams(self, params):
        nchannels, sampwidth, framerate, nframes, comptype, compname = params
        if self._datawritten:
            raise Error('cannot change parameters after starting to write')
        self.setnchannels(nchannels)
        self.setsampwidth(sampwidth)
        self.setframerate(framerate)
        self.setnframes(nframes)
        self.setcomptype(comptype, compname)

def getparams(self):
        if not self._nchannels or not self._sampwidth or not self._framerate:
            raise Error('not all parameters set')
        return _wave_params(self._nchannels, self._sampwidth, self._framerate,
              self._nframes, self._comptype, self._compname)

def setmark(self, id, pos, name):
        raise Error('setmark() not supported')

def getmark(self, id):
        raise Error('no marks')

def getmarkers(self):
        return None

def tell(self):
        return self._nframeswritten

def writeframesraw(self, data):
        if not isinstance(data, (bytes, bytearray)):
            data = memoryview(data).cast('B')
        self._ensure_header_written(len(data))
        nframes = len(data) // (self._sampwidth * self._nchannels)
        if self._convert:
            data = self._convert(data)
        if self._sampwidth != 1 and sys.byteorder == 'big':
            data = _byteswap(data, self._sampwidth)
        self._file.write(data)
        self._datawritten += len(data)
        self._nframeswritten = self._nframeswritten + nframes

def writeframes(self, data):
        self.writeframesraw(data)
        if self._datalength != self._datawritten:
            self._patchheader()

def close(self):
        try:
            if self._file:
                self._ensure_header_written(0)
                if self._datalength != self._datawritten:
                    self._patchheader()
                self._file.flush()
        finally:
            self._file = None
            file = self._i_opened_the_file
            if file:
                self._i_opened_the_file = None
                file.close()

#
    # Internal methods.
    #

def _ensure_header_written(self, datasize):
        if not self._headerwritten:
            if not self._nchannels:
                raise Error('# channels not specified')
            if not self._sampwidth:
                raise Error('sample width not specified')
            if not self._framerate:
                raise Error('sampling rate not specified')
            self._write_header(datasize)

def _write_header(self, initlength):
        assert not self._headerwritten
        self._file.write(b'RIFF')
        if not self._nframes:
            self._nframes = initlength // (self._nchannels * self._sampwidth)
        self._datalength = self._nframes * self._nchannels * self._sampwidth
        try:
            self._form_length_pos = self._file.tell()
        except (AttributeError, OSError):
            self._form_length_pos = None
        self._file.write(struct.pack('<L4s4sLHHLLHH4s',
            36 + self._datalength, b'WAVE', b'fmt ', 16,
            WAVE_FORMAT_PCM, self._nchannels, self._framerate,
            self._nchannels * self._framerate * self._sampwidth,
            self._nchannels * self._sampwidth,
            self._sampwidth * 8, b'data'))
        if self._form_length_pos is not None:
            self._data_length_pos = self._file.tell()
        self._file.write(struct.pack('<L', self._datalength))
        self._headerwritten = True

def _patchheader(self):
        assert self._headerwritten
        if self._datawritten == self._datalength:
            return
        curpos = self._file.tell()
        self._file.seek(self._form_length_pos, 0)
        self._file.write(struct.pack('<L', 36 + self._datawritten))
        self._file.seek(self._data_length_pos, 0)
        self._file.write(struct.pack('<L', self._datawritten))
        self._file.seek(curpos, 0)
        self._datalength = self._datawritten

def open(f, mode=None):
    if mode is None:
        if hasattr(f, 'mode'):
            mode = f.mode
        else:
            mode = 'rb'
    if mode in ('r', 'rb'):
        return Wave_read(f)
    elif mode in ('w', 'wb'):
        return Wave_write(f)
    else:
        raise Error("mode must be 'r', 'rb', 'w', or 'wb'")

cmd: