CREATE TABLE table_22113 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Results" TEXT, "Candidates" TEXT)

In the district of Pennsylvania 1, what is the total number of political parties?
SELECT COUNT("Party") FROM table_22113 WHERE "District" = 'Pennsylvania 1'
SELECT COUNT("Party") FROM "table_22113" WHERE "District" = 'Pennsylvania 1'