Type Error: Expected <class ‘openpyxl.styles.fills.fill’>
The error message “Type Error: Expected <class ‘openpyxl.styles.fills.fill’>” typically occurs when you are working with the openpyxl library in Python and encounter an issue related to the fill styles of cells in an Excel file.
Possible Causes:
- You are trying to assign a value of a wrong type to a cell’s fill style.
- The fill style you are trying to apply does not exist or is not supported by openpyxl.
Example:
Let’s assume you are trying to set the fill style of a cell to a specific color:
from openpyxl import Workbook
from openpyxl.styles import PatternFill
# Create a new workbook
wb = Workbook()
# Select the active sheet
sheet = wb.active
# Create a fill style object
fill = PatternFill(start_color="FF0000", end_color="FF0000", fill_type="solid")
# Assign the fill style to a cell
cell = sheet['A1']
cell.fill = fill
# Save the workbook
wb.save("output.xlsx")
In this example, we have created a fill style using the PatternFill class with start and end colors set to “FF0000” (red) and fill type set to “solid”. Then, we assign this fill style to cell A1 in the active worksheet.
If you receive the “Type Error: Expected <class ‘openpyxl.styles.fills.fill’>” message, ensure that you have imported the necessary modules correctly and that the values you assign to the fill style are of the correct type.