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python - Pandas XLSWriter - 返回而不是写入

问题描述

我想从我的 Flask (Python) 服务器返回一个 Excel 文件。这段代码：

writer = pd.ExcelWriter('filename.xlsx')
dataframe.to_excel(writer, index=False)
writer.save()

将 Excel 文件写入文件系统。我怎样才能return文件而不是写它？

标签： pythonexcelpandas

解决方案

StringIO您可以使用orBytesIO对象将 excel 数据写入内存。

此代码是从此处的熊猫文档中复制的：

# Safe import for either Python 2.x or 3.x
try:
    from io import BytesIO
except ImportError:
    from cStringIO import StringIO as BytesIO

bio = BytesIO()

# By setting the 'engine' in the ExcelWriter constructor.
writer = ExcelWriter(bio, engine='xlsxwriter')
df.to_excel(writer, sheet_name='Sheet1')

# Save the workbook
writer.save()

# Seek to the beginning and read to copy the workbook to a variable in memory
bio.seek(0)
workbook = bio.read()

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