gistfile1

#!/usr/bin/python
# Title: Update Employee records in a plain text file

FILE_NAME = 'employee.txt'
DELIMIT = ';'

def prompt_values():
	_values = {}
	_values['ename'] = raw_input("Employee Name: ")
	_values['esal'] = float(raw_input("Employee Sal: "))
	return _values

def main():
	print "Enter your option:"
	print "1. Insert a new employee record"
	print "2. Update a existing record"
	print "3. Delete a record"
	print ": "
	opt = raw_input().strip()
	
	if opt == '1':
		_empId = int(raw_input("Employee ID: "))
		records = open(FILE_NAME).readlines()
		for rec in records:
			if rec.split(DELIMIT)[0] == _empId:
				# record is already existing...
				print "This record already exists"
				print rec.split(DELIMIT)
				records.close()
				return
		efile = open(FILE_NAME, 'a+')
		erecord = prompt_values()
		efile.write("%s;%s;%s" % (_empId, erecord['ename'], erecord['esal']))
		efile.write("\r\n")
		efile.close()
		return
		
	elif opt == '2':
		_empId = int(raw_input("Employee ID: "))
		records = open(FILE_NAME).readlines()
		wrecords = []
		for rec in records:
			if rec.split(DELIMIT)[0] == _empId:
				# record found...
				erecord = prompt_values()
				wrecords.append(_empId, erecord['ename'], erecord['esal'])
				print "Record is updated"
			else:
				wrecords.append(rec)
		
		efile = open(FILE_NAME, 'w')
		efile.writelines(wrecords)
		efile.close()
				
	elif opt == '3':
		pass

if __name__ == '__main__':
	main()