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#!/usr/bin/env python3
def compare(v1, v2):
cmp = 0
if v1 is v2: return cmp
# To have lower precedence for underscore, use ascii code smaller than dot's ascii code
v1 = v1.replace('_', '-')
v2 = v2.replace('_', '-')
a1 = [ord(c) for c in v1]
a2 = [ord(c) for c in v2]
# Fills with zero until same length
while len(a1) < len(a2): a1.append(0)
while len(a2) < len(a1): a2.append(0)
while True:
if len(a1) is 0: break
t1 = a1.pop(0)
t2 = a2.pop(0)
cmp = (t1 > t2) - (t1 < t2) # simulate cmp() for python 3.x
if cmp is not 0: break
return cmp
data = '''\
0.1 1.1
2.0 1.2
1.2 1.2_5
1.2.1 1.2_1
1.2.1 1.2.1
'''
items = data.splitlines()
sig = {'0': '=', '1': '>', '-1': '<'}
print("%10s %10s %s" % ('v1', 'v2', 'Result'))
print("%10s %10s %s" % ('-' * 10, '-' * 10, '-' * 6))
for item in items:
v1, v2 = item.split()
ret = compare(v1, v2)
print("%10s %s %10s %5s" % (v1, sig[str(ret)], v2, ret))
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