Поскольку вы новичок в Python, вы должны научиться читать документацию . Доступно множество модулей, и вам будет проще, а остальным - легче, если вы сначала приложите усилия.
import openpyxl
from openpyxl.utils import cell as cellutils
## My example book simply has "=Address(Row(),Column())" in A1:J20
## Because my example uses formulae, I am loading my workbook with
## "data_only = True" in order to get the values; if your cells do not
## contain formulae, you can omit data_only
workbook = openpyxl.load_workbook("workbook.xlsx", data_only = True)
worksheet = workbook.active
## Alterntively: worksheet = workbook["sheetname"]
## A container for gathering the cell values
output = []
## Current Row = 2 assumes that Cell 1 (in this case, J1) contains your column header
## Adjust as necessary
column = cellutils.column_index_from_string("J")
currentrow = 2
## Get the first cell
cell = worksheet.cell(column = column, row = currentrow)
## The purpose of "While cell.value" is that I'm assuming the column
## is complete when the cell does not contain a value
## If you know the exact range you need, you can either use a for-loop,
## or look at openpyxl.utils.cell.rows_from_range
while cell.value:
## Add Cell value to our list of values for this column
output.append(cell.value)
## Move to the next row
currentrow += 1
## Get that cell
cell = worksheet.cell(column = column, row = currentrow)
print(output)
""" output: ['$J$2', '$J$3', '$J$4', '$J$5', '$J$6', '$J$7',
'$J$8', '$J$9', '$J$10', '$J$11', '$J$12', '$J$13', '$J$14',
'$J$15', '$J$16', '$J$17', '$J$18', '$J$19', '$J$20']