Writing blob from SQLite to file using Python
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Here's a script that does read a file, put it in the database, read it from database and then write it to another file:
import sqlite3
conn = sqlite3.connect('database.db')
cursor = conn.cursor()
with open("...", "rb") as input_file:
ablob = input_file.read()
cursor.execute("INSERT INTO notes (id, file) VALUES(0, ?)", [sqlite3.Binary(ablob)])
conn.commit()
with open("Output.bin", "wb") as output_file:
cursor.execute("SELECT file FROM notes WHERE id = 0")
ablob = cursor.fetchone()
output_file.write(ablob[0])
cursor.close()
conn.close()
I tested it with an xml and a pdf and it worked perfectly. Try it with your odt file and see if it works.
Author by
dmpop
Updated on August 05, 2020Comments
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dmpop over 3 years
A clueless Python newbie needs help. I muddled through creating a simple script that inserts a binary file into a blog field in a SQLite database:
import sqlite3 conn = sqlite3.connect('database.db') cursor = conn.cursor() input_note = raw_input(_(u'Note: ')) input_type = 'A' input_file = raw_input(_(u'Enter path to file: ')) with open(input_file, 'rb') as f: ablob = f.read() f.close() cursor.execute("INSERT INTO notes (note, file) VALUES('"+input_note+"', ?)", [buffer(ablob)]) conn.commit() conn.close()
Now I need to write a script that grabs the contents of the blob field of a specific record and writes the binary blob to a file. In my case, I use the SQLite database to store .odt documents, so I want to grab and save them as .odt files. How do I go about that? Thanks!