Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| District | Incumbent | Party | First elected | Results | Candidates |
| --- | --- | --- | --- | --- | --- |
| Pennsylvania 1 | Bob Brady | Democratic | 1998.0 | Re-elected | Bob Brady (D) unopposed |
| Pennsylvania 4 | Melissa Hart | Republican | 2000.0 | Lost re-election Democratic gain | Jason Altmire (D) 51.9% Melissa Hart (R) 48.1% |
| Pennsylvania 5 | John Peterson | Republican | 1996.0 | Re-elected | John Peterson (R) 60.1% Don Hilliard (D) 39.9% |
| Pennsylvania 6 | Jim Gerlach | Republican | 2002.0 | Re-elected | Jim Gerlach (R) 50.7% Lois Murphy (D) 49.3% |
| Pennsylvania 7 | Curt Weldon | Republican | 1986.0 | Lost re-election Democratic gain | Joe Sestak (D) 56.4% Curt Weldon (R) 43.6% |
| Pennsylvania 9 | Bill Shuster | Republican | 2001.0 | Re-elected | Bill Shuster (R) 60.3% Tony Barr (D) 39.7% |
| Pennsylvania 10 | Don Sherwood | Republican | 1998.0 | Lost re-election Democratic gain | Chris Carney (D) 52.9% Don Sherwood (R) 47.1% |
| Pennsylvania 11 | Paul Kanjorski | Democratic | 1984.0 | Re-elected | Paul Kanjorski (D) 72.5% Joseph Leonardi (R) 27.5% |
| Pennsylvania 12 | John Murtha | Democratic | 1974.0 | Re-elected | John Murtha (D) 60.8% Diana Irey (R) 39.2% |
| Pennsylvania 13 | Allyson Schwartz | Democratic | 2004.0 | Re-elected | Allyson Schwartz (D) 66.1% Raj Bhakta (R) 33.9% |
| Pennsylvania 14 | Mike Doyle | Democratic | 1994.0 | Re-elected | Mike Doyle (D) 90.1% Titus North (G) 9.9% |
| Pennsylvania 17 | Tim Holden | Democratic | 1992.0 | Re-elected | Tim Holden (D) 64.5% Matthew Wertz (R) 35.5% |
Question:
In the district of Pennsylvania 1, what is the total number of political parties?
Answer:
1.0