import openpyxl

​

# Load the Excel file

workbook = openpyxl.load_workbook("your_file.xlsx")

​

# Select the worksheet

worksheet = workbook["Sheet1"]

​

# Retrieve the column range

column_range = worksheet["A:A"]

​

# Apply the formula to the entire column

for cell in column_range:

    cell.value = "=your_formula"

​

# Save the changes

workbook.save("your_file.xlsx")