完成函数时找不到临时文件 [英] Tempfile not found when finishing function
本文介绍了完成函数时找不到临时文件的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
with tempfile.TemporaryFile (mode='w', newline="", dir=".", suffix='.csv') as csvfilenew:
writer = csv.writer(csvfilenew, delimiter= ';')
myClick()
return send_file(str(csvfilenew.name), as_attachment=True, attachment_filename='cleanfile.csv')
FileNotFoundError: [Errno 2] No such file or directory: '/Desktop/bulk_final/10'
推荐答案
TemporaryFile
在请求Name属性时未返回有效的filedescriptor。您可以使用NamedTemporaryFile
请求名称。
from flask import send_file
import tempfile
import csv
@app.route('/download')
def download():
with tempfile.NamedTemporaryFile(mode='w', newline='', dir='.', suffix='.csv') as csvfilenew:
writer = csv.writer(csvfilenew, delimiter= ';')
writer.writerow(['Spam', 'Lovely Spam', 'Wonderful Spam'])
csvfilenew.flush()
csvfilenew.seek(0)
return send_file(csvfilenew.name,
as_attachment=True,
attachment_filename='cleanfile.csv'
)
另一个适用于少量数据的简单解决方法如下:
from flask import send_file
import csv
import io
@app.route('/download')
def download():
with io.StringIO() as doc:
writer = csv.writer(doc, delimiter= ';')
writer.writerow(['Spam', 'Lovely Spam', 'Wonderful Spam'])
doc.seek(0)
return send_file(io.BytesIO(doc.read().encode('utf8')),
as_attachment=True,
attachment_filename='cleanfile.csv'
)
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