cpython/Doc/includes/sqlite3/blob.py
Erlend Egeberg Aasland 29afb7d2ef
gh-69093: Add indexing and slicing support to sqlite3.Blob (#91599)
Authored-by: Aviv Palivoda <palaviv@gmail.com>
Co-authored-by: Erlend E. Aasland <erlend.aasland@innova.no>
2022-04-21 18:45:16 -07:00

19 lines
561 B
Python

import sqlite3
con = sqlite3.connect(":memory:")
con.execute("create table test(blob_col blob)")
con.execute("insert into test(blob_col) values (zeroblob(13))")
# Write to our blob, using two write operations:
with con.blobopen("test", "blob_col", 1) as blob:
blob.write(b"hello, ")
blob.write(b"world.")
# Modify the first and last bytes of our blob
blob[0] = b"H"
blob[-1] = b"!"
# Read the contents of our blob
with con.blobopen("test", "blob_col", 1) as blob:
greeting = blob.read()
print(greeting) # outputs "b'Hello, world!'"