python tqdm 参数详细说明

Parameters

• iterable : iterable, optional

  Iterable to decorate with a progressbar. Leave blank to manually manage the updates.

• desc : str, optional

  Prefix for the progressbar.

• total : int or float, optional

  The number of expected iterations. If unspecified, len(iterable) is used if possible. If float("inf") or as a last resort, only basic progress statistics are displayed (no ETA, no progressbar). If gui is True and this parameter needs subsequent updating, specify an initial arbitrary large positive number, e.g. 9e9.

• leave : bool, optional

  If [default: True], keeps all traces of the progressbar upon termination of iteration. If None, will leave only if position is 0.

• file : io.TextIOWrapper or io.StringIO, optional

  Specifies where to output the progress messages (default: sys.stderr). Uses file.write(str) and file.flush() methods. For encoding, see write_bytes.

• ncols : int, optional

  The width of the entire output message. If specified, dynamically resizes the progressbar to stay within this bound. If unspecified, attempts to use environment width. The fallback is a meter width of 10 and no limit for the counter and statistics. If 0, will not print any meter (only stats).

• mininterval : float, optional

  Minimum progress display update interval [default: 0.1] seconds.

• maxinterval : float, optional

  Maximum progress display update interval [default: 10] seconds. Automatically adjusts miniters to correspond to mininterval after long display update lag. Only works if dynamic_miniters or monitor thread is enabled.

• miniters : int or float, optional

  Minimum progress display update interval, in iterations. If 0 and dynamic_miniters, will automatically adjust to equal mininterval (more CPU efficient, good for tight loops). If > 0, will skip display of specified number of iterations. Tweak this and mininterval to get very efficient loops. If your progress is erratic with both fast and slow iterations (network, skipping items, etc) you should set miniters=1.

• ascii : bool or str, optional

  If unspecified or False, use unicode (smooth blocks) to fill the meter. The fallback is to use ASCII characters " 123456789#".

• disable : bool, optional

  Whether to disable the entire progressbar wrapper [default: False]. If set to None, disable on non-TTY.

• unit : str, optional

  String that will be used to define the unit of each iteration [default: it].

• unit_scale : bool or int or float, optional

  If 1 or True, the number of iterations will be reduced/scaled automatically and a metric prefix following the International System of Units standard will be added (kilo, mega, etc.) [default: False]. If any other non-zero number, will scale total and n.

• dynamic_ncols : bool, optional

  If set, constantly alters ncols and nrows to the environment (allowing for window resizes) [default: False].

• smoothing : float, optional

  Exponential moving average smoothing factor for speed estimates (ignored in GUI mode). Ranges from 0 (average speed) to 1 (current/instantaneous speed) [default: 0.3].

• bar_format : str, optional

  Specify a custom bar string formatting. May impact performance. [default: '{l_bar}{bar}{r_bar}'], where l_bar='{desc}: {percentage:3.0f}%|' and r_bar='| {n_fmt}/{total_fmt} [{elapsed}<{remaining}, ' '{rate_fmt}{postfix}]' Possible vars: l_bar, bar, r_bar, n, n_fmt, total, total_fmt, percentage, elapsed, elapsed_s, ncols, nrows, desc, unit, rate, rate_fmt, rate_noinv, rate_noinv_fmt, rate_inv, rate_inv_fmt, postfix, unit_divisor, remaining, remaining_s, eta. Note that a trailing ": " is automatically removed after {desc} if the latter is empty.

• initial : int or float, optional

  The initial counter value. Useful when restarting a progress bar [default: 0]. If using float, consider specifying {n:.3f} or similar in bar_format, or specifying unit_scale.

• position : int, optional

  Specify the line offset to print this bar (starting from 0) Automatic if unspecified. Useful to manage multiple bars at once (eg, from threads).

• postfix : dict or *, optional

  Specify additional stats to display at the end of the bar. Calls set_postfix(**postfix) if possible (dict).

• unit_divisor : float, optional

  [default: 1000], ignored unless unit_scale is True.

• write_bytes : bool, optional

  If (default: None) and file is unspecified, bytes will be written in Python 2. If True will also write bytes. In all other cases will default to unicode.

• lock_args : tuple, optional

  Passed to refresh for intermediate output (initialisation, iterating, and updating).

• nrows : int, optional

  The screen height. If specified, hides nested bars outside this bound. If unspecified, attempts to use environment height. The fallback is 20.

• colour : str, optional

  Bar colour (e.g. 'green', '#00ff00').

• delay : float, optional

  Don't display until [default: 0] seconds have elapsed.

 

Extra CLI Options

• delim : chr, optional

  Delimiting character [default: 'n']. Use '0' for null. N.B.: on Windows systems, Python converts 'n' to 'rn'.

• 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.

 

Returns