Django: How to allow a Suspicious File Operation / copy a file

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In Django, SuspiciousFileOperation can be avoid by read the file from external dir and make a tmp file within the project media then save in the appropriate file filed as below 

import tempfile

file_name="file_name.pdf"
EXT_FILE_PATH = "/home/somepath/"
file_path = EXT_FILE_PATH + file_name
if exists(file_path):
    #create a named temporary file within the project base , here in media

    lf = tempfile.NamedTemporaryFile(dir="media")
    f = open(file_path, 'rb')
    lf.write(f.read())
    #doc object with file FileField.

    doc.file.save(file_name, File(lf), save=True)
    lf.close()

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