Data commit

Task/Colour-pinstripe-Printer/Python/colour-pinstripe-printer.py

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+from turtle import *
+from PIL import Image
+import time
+import subprocess
+
+"""
+
+Only works on Windows. Assumes that you have Ghostscript
+installed and in your path.
+
+https://www.ghostscript.com/download/gsdnld.html
+
+Hard coded to 100 pixels per inch.
+
+"""
+
+colors = ["black", "red", "green", "blue", "magenta", "cyan", "yellow", "white"]
+
+screen = getscreen()
+
+# width and height in pixels
+# aspect ratio for 11 by 8.5 paper
+
+inch_width = 11.0
+inch_height = 8.5
+
+pixels_per_inch = 100
+
+pix_width = int(inch_width*pixels_per_inch)
+pix_height = int(inch_height*pixels_per_inch)
+
+screen.setup (width=pix_width, height=pix_height, startx=0, starty=0)
+
+screen.screensize(pix_width,pix_height)
+
+# center is 0,0
+
+# get coordinates of the edges
+
+left_edge = -screen.window_width()//2
+
+right_edge = screen.window_width()//2
+
+bottom_edge = -screen.window_height()//2
+
+top_edge = screen.window_height()//2
+
+# draw quickly
+
+screen.delay(0)
+screen.tracer(5)
+
+for inch in range(int(inch_width)-1):
+    line_width = inch + 1
+    pensize(line_width)
+    colornum = 0
+
+    min_x = left_edge + (inch * pixels_per_inch)
+    max_x = left_edge + ((inch+1) * pixels_per_inch)
+
+    for y in range(bottom_edge,top_edge,line_width):
+        penup()
+        pencolor(colors[colornum])
+        colornum = (colornum + 1) % len(colors)
+        setposition(min_x,y)
+        pendown()
+        setposition(max_x,y)
+
+screen.getcanvas().postscript(file="striped.eps")
+
+# convert to jpeg
+# won't work without Ghostscript.
+
+im = Image.open("striped.eps")
+im.save("striped.jpg")
+
+# Got idea from http://rosettacode.org/wiki/Colour_pinstripe/Printer#Go
+
+subprocess.run(["mspaint", "/pt", "striped.jpg"])