XLSX

XLSX Skill

This skill provides capabilities to work with Excel spreadsheets (.xlsx) using Python.

Core Capabilities

1. Create New Spreadsheets: Generate .xlsx files programmatically.
2. Read Data: Extract data from sheets into structured formats.
3. Modify Existing Sheets: Update cells, add rows, or change formatting.
4. Data Analysis: Load data into pandas DataFrames for analysis.

Dependencies

This skill relies on openpyxl and pandas.

pip install openpyxl pandas

Workflows

1. Creating a New Workbook

Use openpyxl to create a new workbook.

from openpyxl import Workbook

wb = Workbook()
ws = wb.active
ws.title = "My Sheet"

# Add data
ws['A1'] = "Name"
ws['B1'] = "Value"
ws.append(["Alice", 100])
ws.append(["Bob", 200])

wb.save("output.xlsx")

2. Reading with Pandas

To easily read an Excel file into a DataFrame:

import pandas as pd

df = pd.read_excel("data.xlsx", sheet_name="Sheet1")
print(df.head())

3. Modifying an Existing Workbook

To edit an existing file:

from openpyxl import load_workbook

wb = load_workbook("existing.xlsx")
ws = wb.active

# Update a cell
ws['B2'] = 999

# save
wb.save("updated.xlsx")

Best Practices

• Library Choice: Use pandas for heavy data reading/analysis. Use openpyxl for formatting, styles, and precise cell manipulation.
• File Safety: Close files properly or use context managers if available (though openpyxl handles save/close explicitly).
• Large Files: For very large files, consider using openpyxl's read_only=True mode or processing in chunks with pandas.

Resources

• openpyxl Documentation
• pandas read_excel Documentation

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