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from fontTools.ttLib import TTFont
from fontTools.ttLib.tables.DefaultTable import DefaultTable
font_path = "myfont.ttf"
output_path = "myfont_patched.ttf"
table_tag = "DSIG"
# Get raw table data from the source font
font = TTFont(font_path)
raw_data = font.getTableData(table_tag)
# Do something with the raw table data
# This example just sets an empty DSIG table.
raw_data = b"\0\0\0\1\0\0\0\0"
# Write the data back to the font
# We could re-use the existing table when the source and target font are
# identical, but let's make a new empty table to be more universal.
table = DefaultTable(table_tag)
table.data = raw_data
# Add the new table back into the source font and save under a new name.
font[table_tag] = table
font.save(output_path)
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