gradient_post

import operator, struct
from Tkinter import Tk

def RGBToHex(rgb):
  return "%02x%02x%02x" % (rgb[0], rgb[1], rgb[2])

def hexToRGB(hex):
  if hex[0] == "#": hex = hex[1:]
  return struct.unpack("BBB",hex.decode("hex"))

def copyToClipboard(text):
  r = Tk()
  r.withdraw()
  r.clipboard_clear()
  r.clipboard_append(text)
  r.destroy()

# The string to colorize
string = "Write your text here!"

# Get string length
length = len(string)

# Starting and ending color of the gradient, you can use hexToRGB() Here
rgb1 = (0, 0, 0)
rgb2 = (255, 255, 255)

# Calculate the differences of two colors
diff = tuple(map(operator.sub, rgb1, rgb2))
diff = tuple(map(operator.neg, diff))
diff = [float (i) for i in diff]

# Get how much is each "step" for each color
portions = (diff[0] / length, diff[1] / length, diff[2] / length)

# Main flow
text = ""
for i, char in enumerate(string):
  if char == " ": # No operations needed
    text += char
    continue

  temp = (portions[0] * i, portions[1] * i, portions[2] * i)
  temp = tuple(map(operator.add, rgb1, temp))
  temp = [int (i) for i in temp]

  color = RGBToHex((temp[0], temp[1], temp[2]))

  text += "[color=#%s]%s[/color]" % (color, char)

# Self explanatory
copyToClipboard(text)