Using shapes like Circles & rectangles to PDF file

PDF

PDF pages in Python to add shapes like circles with random colour fills using ReportLab drawing.


Circles can be drawn by specifying centre X , Y coordinates and by giving radios. We can also specify the colour to be used to fill the circle. Here two circles are drawn with two different background-colors.

With two alternate coloured circles

Two coloured concentric circles in PDF
from reportlab.graphics.shapes import *
my_path='G:\\My drive\\testing\\pypdf2\\my_pdf.pdf' 
d=Drawing(600,600)
import random
for rd in range(0,300,10):
    if(rd%20==0):
        d.add(Circle(300,300,300-rd,fillColor=[1,0,0]))
    else:
        d.add(Circle(300,300,300-rd,fillColor=[0,1,0]))
from reportlab.graphics import renderPDF
renderPDF.drawToFile(d,my_path,'')

Raondom Multi coloured concentric circles

We can generate float between 0 and less than 1 ( exclusive ) by using random.random().

random.uniform() returns between start and stop ( inclusive )
More about Random numbers
Random coloured concentric circles in PDF
from reportlab.graphics.shapes import *
my_path='G:\\My drive\\testing\\pypdf2\\my_pdf.pdf' 
d=Drawing(1200,1200)
import random
for rd in range(0,600,20):
    r=random.random()
    g=random.random()
    b=random.random()
    d.add(Circle(600,600,600-rd,fillColor=[r,g,b]))

from reportlab.graphics import renderPDF
renderPDF.drawToFile(d,my_path,'')

Drawing random colour filled rectangles

Random coloured rectangles in PDF
Here we have used random.uniform() to generate random floats between 0 and 1 (inclusive of 0 and 1). Check this link for difference between random.uniform() and random.random()

More about Random numbers

Here width and height is set to to variables. So it can easily increased or decresed at single point.
w,h=620,620
Full code is here.
from reportlab.graphics.shapes import *
my_path='G:\\My drive\\testing\\pypdf2\\my_pdf.pdf' 
w,h=620,620
d = Drawing(w,h)
import random
for rd in range(0,int(w/2),20):
    r=random.uniform(0,1)
    g=random.uniform(0,1)
    b=random.uniform(0,1)   
    d.add(Rect(rd, rd, w-(rd*2), h-(rd*2), fillColor=[r,g,b]))
        
from reportlab.graphics import renderPDF
renderPDF.drawToFile(d, my_path, '')

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