SyntaxError: invalid syntax

[Truman]

I'm practising developing classes and wrote this code.

class Employee:
    
	raise_amt = 1.04
	
	def __init__(self, first, last, pay):
	    self.first = first
	    self.last = last
	    self.email = first + '.' + last + '@email.com'
	    self.pay = pay
	
	def fullname(self):
	    return '{} {}'.format(self.first, self.last)
		
	def apply_raise(self):
	    self.pay = int(self.pay * self.raise_amt)
	
class Developer(Employee):
    raise_amt = 1.1
    def __init__(self, first, last, pay, prog_lang):
        super().__init__(first, last, pay )
        self.prog_lang = prog_lang

class Manager(Employee):
    def __init__(self, first, last, pay, employees=None):
        super().__init__(first, last, pay )
        self.prog_lang = prog_lang
        if employees is None:
            self.employees = []
        else:
            self.employees = employees
    
    def add_emp(self, emp):
        if emp not in self.employees:
            self.employees.append(emp)
    def remove_emp(self, emp):
        if emp in self.employees:
            self.employees.remove(emp)
    def print_emps(self):
        for emp in self.employees:
            print('-->', emp(fullname())

dev_1 = Developer('Corey', 'Schafer', 50000, 'Python')
dev_2 = Developer('Test', 'Employee', 60000, 'Java')
                  
mgr_1 = Manager('Sue', 'Smith', 90000, [dev_1])
print(mgr_1(email))

print(dev_1.pay)
dev_1.apply_raise()
print(dev_1.pay)
print(dev_1.prog_lang)

dev_1 = Developer('Corey', 'Schafer', 50000, 'Python')
^
SyntaxError: invalid syntax

I don't see the reason for this syntax error. Please advise.