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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!'"
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