from openpyxl.utils import get_column_letter
column_widths = []
for row in Workbook:
for i, cell in enumerate(row):
if len(column_widths) > i:
if len(cell) > column_widths[i]:
column_widths[i] = len(cell)
else:
column_widths += [len(cell)]
for i, column_width in enumerate(column_widths):
worksheet.column_dimensions[get_column_letter(i+1)].width = column_width