Parameters
----------
start  : int, >= 0, optional
    Number is the beginning of iterations. A progress bar is displayed in 
    the console as an initial percentage. It may not start from zero.
    [default: 0]

stop  : int, >= start, optional
    The final number of iterations. This can be either an integer number o
    f iterations, or an integer number of bits of information when 
    uploading or downloading a file.
    [default: 100]

progress_bar  : str, optional
    Choose show or hide the progress bar: ['show', 'hide']
    If you decide to "hide", the options will be disabled as unnecessary:
    variant_bar, variant_brackets, variant_arrow, variant_space, len_bar.
    [default: 'show']

variant_bar  : str, optional
    Select one of the options for displaying the progress bar:
    ['increasing', 'static', 'decreasing']
    'increasing' - increasing progress bar, will increase from 0% to 100%.
    'static' - static progress bar. The place for movement of the progress 
               bar will be immediately displayed. The progress bar will 
               increase from 0% to 100%.
    'decreasing' - A decreasing progress bar, during operation, will 
                   decrease from 100% to 0%.
    As a decrease can begin not from 100%, but for example from 75%, etc., 
    so an increase can start not from 0%, but for example from 30%, etc.
    Displayed when progress_bar='show'
    [default: 'static']

variant_brackets  : str, len(str) == 0 or len(str) == 2, optional
    Specify the parenthesis characters that you want to see before and 
    after the progress bar.
    For example: '||', '{}', '[]', '//', '**' etc. Unicode-symbols.
    If you do not need parentheses, put: ''
    Displayed when progress_bar='show' and variant_bar='static'
    [default: '||']

variant_arrow  : str, not empty, not space, optional
    Indicator arrow variant. For example: '⏹', '∎', '▣', '◉', '●', '#', 
    'X', '=', '/' '\', '.' etc. Unicode-symbols.
    Displayed when progress_bar='show'
    [default: '▇']

variant_space  : str, not empty, may be a white space, optional
    Variant of a whitespace character on an unfilled progress bar area.
    For example: ' ', '-', '·', '༝', '༚', '༛', '༞', '•', '⬞', '◯', '▢',
    '⬜' etc. Unicode-symbols.
    Displayed when progress_bar='show' and variant_bar='static'
    [default: '-']

len_bar  : int, 10 >= len_bar <= 100, optional
    Progress bar length. Counted in console columns.
    It only makes sense when progress_bar='show'
    [default: 35]

progress_str  : str, optional
    Specify the desired name for the percent indicator.
    Displayed when progress_bar='hide'
    [default: 'Progress']

percent  : str, optional
    This parameter is responsible for displaying percent complete and is 
    displayed by default. 
    But, if you need to display the download of the file, and the file 
    size (content-length) is unknown and impossible to obtain (since many 
    online file services began to hide this information and even hide 
    direct links to files), then you’ll have to “hide” the percent of 
    execution - 'hide'.
    [default: 'show']

timer  : str, optional
    Choose show or hide the timer: ['show', 'hide']
    If you decide to "hide", the options will be disabled as unnecessary:
    variant_timer, icon_timer, variant_icon_timer, timer_str,
    reverse_timer_str.
    [default: 'show']

variant_timer: str, optional
    Choose which timer is needed: ['increasing', 'decreasing']
    It only makes sense when timer='show'
    [default: 'increasing']

icon_timer  : str, optional
    Select view the icon timer: ['animated', 'static', 'hide']
    It only makes sense when timer='show'
    [default: 'animated']

variant_icon_timer  : str, optional
    If icon_timer setup in 'animated', then we show an animated
    watch using our set of Unicode-symbols.
    For example: '⏳⏳⏳⌛⌛⌛  ', '⣾⣷⣯⣟⡿⢿⣻⣽', '⣽⣻⢿⡿⣟⣯⣷⣾',
    '᎐᎐᎓᎓᎒᎒᎓᎓᎐᎐', '᎒᎒᎓᎓᎐᎐', '᎐᎐᎓᎓᎒᎒', '᎐᎓᎒᎓᎐', '᎐᎓᎒', '᎒᎓᎐', '∴∵', '∴∵∷',
    '▁▂▃▄▅▆▇█▇▆▅▄▃▂▁', '▁▂▃▄▅▆▇█', '█▇▆▅▄▃▂▁', '▞▚', '▬▭', '▮▯', '⚪⚫',
    '▏▎▍▌▋▊▉█▉▊▋▌▍▎▏', '▏▎▍▌▋▊▉█', '█▉▊▋▌▍▎▏', 'ↀↀↂↂↈↈ',
    '⋮⋰⋱', '⋱⋰⋮', '⋱⋰', '⎽⎼⎻⎺⎻⎼⎽', '-\\|//', '//|\\-',
    'ⅠⅠⅡⅡⅢⅢⅢⅡⅡⅠⅠ', 'ⅠⅠⅡⅡⅢⅢ', 'ⅠⅡⅢ', '◑◒◐◓', '○◔◑◕●', '●◕◑◔○',
    '◀▼▶▲', '▲▶▼◀', '◢◣◤◥', '◥◤◣◢', '◥◣◤◢', '◢◤◣◥', '◩⬔◪⬕', '⬕◪⬔◩',
    '⬜⬜⬛⬛', '⬜⬛', '◨⬓◧⬒', '⬒◧⬓◨', '◨⬓◧⬒◨⬓◧⬒◨⬒◧⬓◨⬒◧⬓◨⬓', '♦♦♢♢', '♦♢',
    ' ◨⬓◧⬒◨⬓◧⬒◨⬓◧⬒◨⬓◧⬒ ⬒◧⬓◨⬒◧⬓◨⬒◧⬓◨⬒◧⬓◨',  '⊕⊗', '☢☢☢   ', '⌃⌄',
    '⇑⇗⇒⇘⇓⇙⇐⇖', '←↖↑↗→↘↓↙', '⇠⇡⇢⇣', '↞↟↠↡', '↤↥↦↧', '★☆✪', '★☆✪✫✯',
    '☆✪', '⍟✪☆', '☆✪⍟', '✧✦', '✳✴✵✷', '⚹✳✴✵✷', '✲✱', '♡♡♡♡♡♥♥♡♡♥♥'
    Displayed when timer='show' and icon_timer='animated'
    [default: '🕛🕧🕐🕜🕑🕝🕒🕞🕓🕟🕔🕠🕕🕡🕖🕢🕗🕣🕘🕤🕙🕥🕚🕦']

timer_str  : str, optional
    The line displayed between the timer icon and the digital timer 
    counter, which is incrementing.
    If you do not want to not show this line, you just need to pass an 
    empty line to the parameter: timer_str=''
    Displayed when timer='show' and variant_timer='increasing'
    [default: 'Timer']

reverse_timer_str  : str, optional
    The string displayed between the timer icon and the digital timer 
    counter, which is decreasing. 
    If you do not want to not show this line, you just need to pass an 
    empty line to the parameter: reverse_timer_str=''
    Displayed when timer='show' and variant_timer='decreasing'
    [default: 'eta']

speed  : str, optional
    Choose to show or hide the speed indicator: ['show', 'hide']
    If you decide to "hide", the options will be disabled as unnecessary:
    icon_speed, variant_icon_speed, speed_str
    By default, the indicator is hidden, because the setting is required
    only if the progress indicator calculates the file transfer speed.
    [default: 'hide']

icon_speed  : str, optional
    Choose to show or hide the speed icon, from the list: ['show', 'hide']
    Displayed when speed='show'
    [default: 'show']

variant_icon_speed  : str, optional
    If icon_speed="show", then we will show the icon that is installed by
    default, or the one that the user will set.
    For example: '🚄', '🛪', '🛫', '🛧', '🛬', '🛦', '🚴', '🚵', '🏃'
    Displayed when speed='show' and icon_speed='show'
    [default: '🚀']

speed_str  : str, optional
    The line displayed between the speed icon and the digital speed 
    counter.
    If you do not want to not show this line, you just need to pass an 
    empty line to the parameter: speed_str=''
    Displayed when speed='show'
    [default: 'Speed']

load  : str, optional, 'show' or 'hide'
    Choose to show or hide the load indicator: ['show', 'hide']
    By default, the indicator is hidden, because configuration is required
    only if the progress indicator calculates the file size when it is
    transferred.
    [default: 'hide']

icon_load  : str, optional
    Choose to show or not the load icon, from the list: ['show', 'hide']
    It only makes sense when load='show'
    [default: 'show']

variant_icon_load  : str, optional
    If icon_load="show", then we will show the icon that is installed by
    default, or the one that the user will set.
    For example:
        down: '⭳', '↧', '↓', '🡇', '⭣', '⇓', '⮇', '⭭', '🠯', '🠇', etc.
        up:   '⭱', '↥', '↑', '🡅', '⭡', '⇑', '⮅', '⭫', '🠭', '🠅', etc.
        up-down: '⬍', '↕', '⇕', '⇅', '⭥', '⮁', etc.
    Displayed when load='show' and icon_load='show'
    [default: '⭳']

load_str  : str, optional
    The string to be displayed between the load indicator and the
    digital load counter. 
    If you do not want to not show this line, you just need to pass an 
    empty line to the parameter: load_str=''
    Displayed when load='show'
    [default: 'Loaded']

color  : str, optional
    Select one color by which the indicators will be highlighted and the
    progress bar itself, from the list: ['black', 'red', 'green', 'yellow',
    'blue', 'magenta', 'cyan', 'gray', 'white']
    [default: 'green']

end_msg  : str, optional
    The message after the completion of the progress bar (if necessary).