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#!/usr/bin/env python3
import re
import sys
from braceexpand import braceexpand
if len(sys.argv) != 2:
print("USAGE:\n\t %s { ABC | 123 }" % __file__)
sys.exit()
cols = []
a = list(braceexpand('{A..Z}'))
b = list(braceexpand('{A..Z}{A..Z}'))
c = list(braceexpand('{A..Z}{A..Z}{A..Z}'))
cols.extend(a)
cols.extend(b)
cols.extend(c)
nums = [ n for n in range(1, len(cols) + 1) ]
hcols = dict()
hnums = dict()
for i in range(len(cols)):
hcols[ str(cols[i]) ] = nums[i]
hnums[ str(nums[i]) ] = cols[i]
pattern_nums = re.compile(r'^\d+$')
pattern_cols = re.compile(r'^[A-Z]{1,3}$')
if pattern_nums.match(sys.argv[1]) and int(sys.argv[1]) <= len(nums):
print( hnums[ sys.argv[1] ] )
if pattern_cols.match(sys.argv[1]):
print( hcols[ sys.argv[1] ] )
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