psycopg2 not escaping quotation from tuple arguments? Using sql.SQL to format arguments

I’m trying to dynamically create a table in postgres with psycopg2. It seems when the arguments are passed, pyscopg2 is not escaping quotations and understanding my query. Code looks like this:

input_string_tup = ('col1 int', 'col2 varchar(2)', ...)

create_table_str = sql.SQL("CREATE TABLE {} ({data})").format(
sql.SQL(table_name),
data=sql.SQL(", ").join(sql.Composed(sql.Identifier(i) for i in input_string_tup)
))

execute_batch(cur, create_table_str, [input_string_tup])

The error I’m getting:

psycopg2.errors.SyntaxError: syntax error at end of input LINE 1: ...", 
"shape_area numeric(8, 6)", "shape_length numeric(8, 6)")
                                                         ^

What print(create_table_str.as_string(conn)) outputs:

CREATE TABLE my_table ("col1 int", "col2 varchar(2)", "col3 int", ... )

Edit to show modified answer that works with no string concatenation

input_string_tup = (('col1', 'int'), ('col2, varchar(2)'), ...)

create_table_str = sql.SQL("CREATE TABLE {} ({data})").format(
sql.SQL(table_name),
data=sql.SQL(", ").join(sql.Composed([sql.Identifier(i[0]), 
sql.SQL(' '), sql.SQL(i[1])])  for i in input_string_tup))

Thanks to Adrian for the help

Answer

sql.Identifier is for SQL objects only e.g. table/column names not the types: https://www.postgresql.org/docs/current/sql-syntax-lexical.html#SQL-SYNTAX-IDENTIFIERS

Try:

input_string_tup = (('col1', 'int'), ('col2', 'varchar(2)')) 

table_name = 'test_table' 

create_table_str = sql.SQL("CREATE TABLE {} ({data})").format( 
sql.SQL(table_name), 
data=sql.SQL(", ").join(sql.Composed(sql.Identifier(i[0]) + sql.SQL(' ' + i[1])  for i in input_string_tup)))   

print(create_table_str.as_string(con))                                                                                                                                    
CREATE TABLE test_table ("col1" int, "col2" varchar(2))

cur.execute(create_table_str)