Count Students in a Department

The input file dept.txt holds a single department name (e.g. Comp. Sci.).

Write a program that reads this department name and prints the number of students whose dept_name equals it.

Output: exactly one line containing a single integer — the count of matching students.

Note: Do not hard-code the database name — your program is run against a different database instance for evaluation. The input file is in the same folder as your program.

For the database connection, use these variables:

database = sys.argv[1]   # database name, from the command line
user     = os.environ.get('PGUSER')
password = os.environ.get('PGPASSWORD')
host     = os.environ.get('PGHOST')
port     = os.environ.get('PGPORT')

The input is a file named dept.txt in the same folder — A single line containing a department name exactly as stored in the department table..

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Database: University

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