import re

content = ("[\n"
	" 1,\n"
	" 2, \n"
	" true\n"
	" ]")

print(re.sub(r'(\[\n[ ]+\d+, ?\n[ ]+)\d+(, ?\n[ ]+(?:true|false)\n[ ]+\])', r'\1__table1.column__\2', content))