20 python project - painting the picture turn character

Transfer from laboratory building: https://www.shiyanlou.com/courses/370/learning/?id=1191

Code:

# - * - Coding: UTF-. 8 - * - 
from the PIL Import Image
 Import argparse 

# Create instance ArgumentParser 
Parser = argparse.ArgumentParser () 

# define input file, an output file, the output character width and height of the draw 
parser.add_argument ( ' File ' ) # mandatory parameters. 1 
parser.add_argument ( ' -o ' , ' --output ' )     # optional parameter 2 
parser.add_argument ( ' --width ' , = int type, default = 80)   # optional parameters 3 
parser.add_argument ( ' --height' , = Int type, default = 80) # optional parameters 4 

# parse and obtain the parameter 
args = parser.parse_args () 

# input image file path to 
the IMG = args.file 

# input character painting width 
WIDTH = args.width 

# Videos input character height 
hEIGHT = args.height 

# output path character painting 
the oUTPUT = args.output 

# first gradation values into RGB values, and then use the gray value is mapped to a character in the character list 
ascii_char = list ( " $ @ B%. 8 & the WM # * oahkbdpqwmZO0QLCJUYXzcvunxrjft / \ | (). 1 {} [] -_ + ~ <> I lI;:?!, \." ^ ` ' " ) 

DEF GET_CHAR (R & lt, G, B, Alpha = 256 ):
     # Analyzing alpha value 
    IF alpha ==0:
         return  '  ' 
    # Get the length of the character set 
    length = len (ascii_char) 

    # RGB values into gray, gray value range of 0-255 
    Gray = int (R & lt 0.2126 * 0.7152 * G + 0.0722 * + B) 

    # gray value range of 0-255, but only 70 characters 
    # require a process to the gradation value to the developed character map 
    uint = (256.0 +. 1) / length 

    # return gradation values corresponding to the characters 
    return ascii_char [ int (Gray / uint)] 

IF  the __name__ == ' __main__ ' :
     # open and adjust the width and height of the image 
    IM = Image.open (the IMG) 
    IM = im.resize ((wIDTH, HEIGHT), Image.NEAREST) 

    #Initialization string output 
    TXT = "" 

    # traverse each line in the picture 
    for I in Range (HEIGHT):
         for J in Range (WIDTH): 
            TXT + = GET_CHAR (* im.getpixel ((J, I)))
         # after through each row need to add a line break 
        TXT + = ' \ n- ' 
    # output to screen 
    Print (TXT) 

    # character painting output to a file 
    IF the oUTPUT: 
        with Open (the oUTPUT, ' W ' ) AS F: 
            f.write (TXT ) 
    the else : 
        with Open ( " output.txt ",'w') as f:
            f.write(txt)

operation result: