Just a poster for special cases...

1.py

import sys
coordinates = [
    [(1,5), (6,12), (45,47)],
    [(6,8), (14,16), (45,47)],
    [(6,8), (14,16), (26,28), (30,32), (35,38), (39,42), (45,47), (50,52), (55,59)],
    [(6,8), (14,16), (17,19), (24,26), (30,32), (36,38), (41,43), (45,47), (49,51), (54,56)],
    [(6,8), (14,16), (19,21), (23,25), (30,32), (36,38), (41,43), (45,49), (56,59)],
    [(6,8), (14,16), (19,21), (24,26), (30,32), (36,38), (41,43), (45,47), (49,51), (58,60)],
    [(6,8), (14,16), (19,21), (25,29), (30,33), (35,38), (41,43), (45,47), (50,52), (54,56), (58, 60)]
]

def writeArrow(a, b):
    sys.stdout.write('>' + '=' * (b - a - 1) + '>')

def writeSpace(a, b):
    sys.stdout.write(' '*(b - a - 1))

for line in coordinates:
    lasty = 0
    for item in line:
        x, y = item
        writeSpace(lasty, x)
        writeArrow(x, y)
        lasty = y
    sys.stdout.write('\n')

Thanks in ASCII arts