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"""
Module version for monitoring CLI pipes (`... | python -m tqdm | ...`).
"""
import logging
import re
import sys
from ast import literal_eval as numeric
from .std import TqdmKeyError, TqdmTypeError, tqdm
from .version import __version__
__all__ = ["main"]
log = logging.getLogger(__name__)
def cast(val, typ):
log.debug((val, typ))
if " or " in typ:
for t in typ.split(" or "):
try:
return cast(val, t)
except TqdmTypeError:
pass
raise TqdmTypeError(val + ' : ' + typ)
# sys.stderr.write('\ndebug | `val:type`: `' + val + ':' + typ + '`.\n')
if typ == 'bool':
if (val == 'True') or (val == ''):
return True
elif val == 'False':
return False
else:
raise TqdmTypeError(val + ' : ' + typ)
try:
return eval(typ + '("' + val + '")')
except Exception:
if typ == 'chr':
return chr(ord(eval('"' + val + '"'))).encode()
else:
raise TqdmTypeError(val + ' : ' + typ)
def posix_pipe(fin, fout, delim=b'\\n', buf_size=256,
callback=lambda float: None, callback_len=True):
"""
Params
------
fin : binary file with `read(buf_size : int)` method
fout : binary file with `write` (and optionally `flush`) methods.
callback : function(float), e.g.: `tqdm.update`
callback_len : If (default: True) do `callback(len(buffer))`.
Otherwise, do `callback(data) for data in buffer.split(delim)`.
"""
fp_write = fout.write
if not delim:
while True:
tmp = fin.read(buf_size)
# flush at EOF
if not tmp:
getattr(fout, 'flush', lambda: None)()
return
fp_write(tmp)
callback(len(tmp))
# return
buf = b''
len_delim = len(delim)
# n = 0
while True:
tmp = fin.read(buf_size)
# flush at EOF
if not tmp:
if buf:
fp_write(buf)
if callback_len:
# n += 1 + buf.count(delim)
callback(1 + buf.count(delim))
else:
for i in buf.split(delim):
callback(i)
getattr(fout, 'flush', lambda: None)()
return # n
while True:
i = tmp.find(delim)
if i < 0:
buf += tmp
break
fp_write(buf + tmp[:i + len(delim)])
# n += 1
callback(1 if callback_len else (buf + tmp[:i]))
buf = b''
tmp = tmp[i + len_delim:]
# ((opt, type), ... )
RE_OPTS = re.compile(r'\n {4}(\S+)\s{2,}:\s*([^,]+)')
# better split method assuming no positional args
RE_SHLEX = re.compile(r'\s*(?<!\S)--?([^\s=]+)(\s+|=|$)')
# TODO: add custom support for some of the following?
UNSUPPORTED_OPTS = ('iterable', 'gui', 'out', 'file')
# The 8 leading spaces are required for consistency
CLI_EXTRA_DOC = r"""
Extra CLI Options
-----------------
name : type, optional
TODO: find out why this is needed.
delim : chr, optional
Delimiting character [default: '\n']. Use '\0' for null.
N.B.: on Windows systems, Python converts '\n' to '\r\n'.
buf_size : int, optional
String buffer size in bytes [default: 256]
used when `delim` is specified.
bytes : bool, optional
If true, will count bytes, ignore `delim`, and default
`unit_scale` to True, `unit_divisor` to 1024, and `unit` to 'B'.
tee : bool, optional
If true, passes `stdin` to both `stderr` and `stdout`.
update : bool, optional
If true, will treat input as newly elapsed iterations,
i.e. numbers to pass to `update()`. Note that this is slow
(~2e5 it/s) since every input must be decoded as a number.
update_to : bool, optional
If true, will treat input as total elapsed iterations,
i.e. numbers to assign to `self.n`. Note that this is slow
(~2e5 it/s) since every input must be decoded as a number.
null : bool, optional
If true, will discard input (no stdout).
manpath : str, optional
Directory in which to install tqdm man pages.
comppath : str, optional
Directory in which to place tqdm completion.
log : str, optional
CRITICAL|FATAL|ERROR|WARN(ING)|[default: 'INFO']|DEBUG|NOTSET.
"""
def main(fp=sys.stderr, argv=None):
"""
Parameters (internal use only)
---------
fp : file-like object for tqdm
argv : list (default: sys.argv[1:])
"""
if argv is None:
argv = sys.argv[1:]
try:
log_idx = argv.index('--log')
except ValueError:
for i in argv:
if i.startswith('--log='):
logLevel = i[len('--log='):]
break
else:
logLevel = 'INFO'
else:
# argv.pop(log_idx)
# logLevel = argv.pop(log_idx)
logLevel = argv[log_idx + 1]
logging.basicConfig(level=getattr(logging, logLevel),
format="%(levelname)s:%(module)s:%(lineno)d:%(message)s")
d = tqdm.__doc__ + CLI_EXTRA_DOC
opt_types = dict(RE_OPTS.findall(d))
# opt_types['delim'] = 'chr'
for o in UNSUPPORTED_OPTS:
opt_types.pop(o)
log.debug(sorted(opt_types.items()))
# d = RE_OPTS.sub(r' --\1=<\1> : \2', d)
split = RE_OPTS.split(d)
opt_types_desc = zip(split[1::3], split[2::3], split[3::3])
d = ''.join(('\n --{0} : {2}{3}' if otd[1] == 'bool' else
'\n --{0}=<{1}> : {2}{3}').format(
otd[0].replace('_', '-'), otd[0], *otd[1:])
for otd in opt_types_desc if otd[0] not in UNSUPPORTED_OPTS)
help_short = "Usage:\n tqdm [--help | options]\n"
d = help_short + """
Options:
-h, --help Print this help and exit.
-v, --version Print version and exit.
""" + d.strip('\n') + '\n'
# opts = docopt(d, version=__version__)
if any(v in argv for v in ('-v', '--version')):
sys.stdout.write(__version__ + '\n')
sys.exit(0)
elif any(v in argv for v in ('-h', '--help')):
sys.stdout.write(d + '\n')
sys.exit(0)
elif argv and argv[0][:2] != '--':
sys.stderr.write(f"Error:Unknown argument:{argv[0]}\n{help_short}")
argv = RE_SHLEX.split(' '.join(["tqdm"] + argv))
opts = dict(zip(argv[1::3], argv[3::3]))
log.debug(opts)
opts.pop('log', True)
tqdm_args = {'file': fp}
try:
for (o, v) in opts.items():
o = o.replace('-', '_')
try:
tqdm_args[o] = cast(v, opt_types[o])
except KeyError as e:
raise TqdmKeyError(str(e))
log.debug('args:' + str(tqdm_args))
delim_per_char = tqdm_args.pop('bytes', False)
update = tqdm_args.pop('update', False)
update_to = tqdm_args.pop('update_to', False)
if sum((delim_per_char, update, update_to)) > 1:
raise TqdmKeyError("Can only have one of --bytes --update --update_to")
except Exception:
fp.write("\nError:\n" + help_short)
stdin, stdout_write = sys.stdin, sys.stdout.write
for i in stdin:
stdout_write(i)
raise
else:
buf_size = tqdm_args.pop('buf_size', 256)
delim = tqdm_args.pop('delim', b'\\n')
tee = tqdm_args.pop('tee', False)
manpath = tqdm_args.pop('manpath', None)
comppath = tqdm_args.pop('comppath', None)
if tqdm_args.pop('null', False):
class stdout(object):
@staticmethod
def write(_):
pass
else:
stdout = sys.stdout
stdout = getattr(stdout, 'buffer', stdout)
stdin = getattr(sys.stdin, 'buffer', sys.stdin)
if manpath or comppath:
from importlib import resources
from os import path
from shutil import copyfile
def cp(name, dst):
"""copy resource `name` to `dst`"""
if hasattr(resources, 'files'):
copyfile(str(resources.files('tqdm') / name), dst)
else: # py<3.9
with resources.path('tqdm', name) as src:
copyfile(str(src), dst)
log.info("written:%s", dst)
if manpath is not None:
cp('tqdm.1', path.join(manpath, 'tqdm.1'))
if comppath is not None:
cp('completion.sh', path.join(comppath, 'tqdm_completion.sh'))
sys.exit(0)
if tee:
stdout_write = stdout.write
fp_write = getattr(fp, 'buffer', fp).write
class stdout(object): # pylint: disable=function-redefined
@staticmethod
def write(x):
with tqdm.external_write_mode(file=fp):
fp_write(x)
stdout_write(x)
if delim_per_char:
tqdm_args.setdefault('unit', 'B')
tqdm_args.setdefault('unit_scale', True)
tqdm_args.setdefault('unit_divisor', 1024)
log.debug(tqdm_args)
with tqdm(**tqdm_args) as t:
posix_pipe(stdin, stdout, '', buf_size, t.update)
elif delim == b'\\n':
log.debug(tqdm_args)
write = stdout.write
if update or update_to:
with tqdm(**tqdm_args) as t:
if update:
def callback(i):
t.update(numeric(i.decode()))
else: # update_to
def callback(i):
t.update(numeric(i.decode()) - t.n)
for i in stdin:
write(i)
callback(i)
else:
for i in tqdm(stdin, **tqdm_args):
write(i)
else:
log.debug(tqdm_args)
with tqdm(**tqdm_args) as t:
callback_len = False
if update:
def callback(i):
t.update(numeric(i.decode()))
elif update_to:
def callback(i):
t.update(numeric(i.decode()) - t.n)
else:
callback = t.update
callback_len = True
posix_pipe(stdin, stdout, delim, buf_size, callback, callback_len)
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