[email protected] wrote:
> how to get a value from CSV specific cell (A7) thanks
$ cat csv_sheet.py
#!/usr/bin/python3
import re
import csv
import string
LOOKUP = {c: i for i, c in enumerate(string.ascii_uppercase, 1)}
def a2i(s):
"""
>>> a2i("A")
0
>>> a2i("Z")
25
>>> a2i("AA")
26
>>> a2i("AZ")
51
>>> a2i("BA")
52
"""
sigma = 0
for c in s:
sigma *= len(LOOKUP)
sigma += LOOKUP[c]
return sigma - 1
def offset(s):
m = re.match("([A-Z]+)([0-9]+)", s.upper())
if m is None:
raise ValueError
col, row = m.groups()
return a2i(col), int(row) - 1
if __name__ == "__main__":
import argparse
parser = argparse.ArgumentParser()
parser.add_argument("file")
parser.add_argument("cells", metavar="cell", nargs="+")
args = parser.parse_args()
with open(args.file) as f:
rows = list(csv.reader(f))
for cell in args.cells:
x, y = offset(cell)
print(rows[y][x])
$ cat tmp.csv
1,2,3,4,5,6,7,8,9
10,20,30,40,50,60,70,80,90
100,200,300,400,500,600,700,800,900
1000,2000,3000,4000,5000,6000,7000,8000,9000
1,2,3,4,5,6,7,8,9
10,20,30,40,50,60,70,80,90
100,200,300,400,500,600,700,800,900
$ ./csv_sheet.py tmp.csv a7 b2 c3
100
20
300
$ python3 -m doctest csv_sheet.py # otherwise untested
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