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e4.py
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e4.py
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from reportlab.pdfgen import canvas
def colorsRGB(canvas):
from reportlab.lib import colors
from reportlab.lib.units import inch
black = colors.black
y = x = 0; dy=inch*3/4.0; dx=inch*5.5/5; w=h=dy/2; rdx=(dx-w)/2
rdy=h/5.0; texty=h+2*rdy
canvas.setFont("Helvetica",10)
for [namedcolor, name] in (
[colors.lavenderblush, "lavenderblush"],
[colors.lawngreen, "lawngreen"],
[colors.lemonchiffon, "lemonchiffon"],
[colors.lightblue, "lightblue"],
[colors.lightcoral, "lightcoral"]):
canvas.setFillColor(namedcolor)
canvas.rect(x+rdx, y+rdy, w, h, fill=1)
canvas.setFillColor(black)
canvas.drawCentredString(x+dx/2, y+texty, name)
x = x+dx
y = y + dy; x = 0
for rgb in [(1,0,0), (0,1,0), (0,0,1), (0.5,0.3,0.1), (0.4,0.5,0.3)]:
r,g,b = rgb
canvas.setFillColorRGB(r,g,b)
canvas.rect(x+rdx, y+rdy, w, h, fill=1)
canvas.setFillColor(black)
canvas.drawCentredString(x+dx/2, y+texty, "r%s g%s b%s"%rgb)
x = x+dx
y = y + dy; x = 0
for gray in (0.0, 0.25, 0.50, 0.75, 1.0):
canvas.setFillGray(gray)
canvas.rect(x+rdx, y+rdy, w, h, fill=1)
canvas.setFillColor(black)
canvas.drawCentredString(x+dx/2, y+texty, "gray: %s"%gray)
x = x+dx
c = canvas.Canvas("hello.pdf")
colorsRGB(c)
c.showPage()
c.save()