py220

A Python VT220 Interface

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VT220 Configuration Assumptions:

• baud_rate: 9600
• byte_size: 8 bits
• stop_bits: 1
• parity: none
• newline sent from terminal contains the \n char
• default configuration is light text on dark background

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Usage:

• write() to write a given string, newline not appended.
• read_char(block=False, on_char=None) to read a single character from the buffer. Character is returned. Optional callback to call when character is read
• read_line(block=False, on_char=None, on_line=None) to read a single line (ending in '\n'). Line is built character by character, and returned whole. Optional callback when character or line is read
• read_forever(on_char=None, on_line=None) for a looped reading of the terminal, passing callbacks for when a character or a line is read.
• clear_and_home() to clear the screen and place the cursor in the upper left corner
• light_on_dark() to set the video to light characters on a dark background
• dark_on_light() to set the video to dark characters on a light background
• flash_screen(wait_time=0.03): flash dark_on_light then light_on_dark, with a given wait in between. Used as a visual BELL