[Tutor] What's the invaild syntax? Error message and relative code supplied.

[Nathan Pinno]

What the invalid syntax? Here is the error message: SyntaxError: invalid syntax   File "D:/Python22/grades.py", line 66     which = which-1         ^ SyntaxError: invalid syntax   Here is the code:   max_points = [25,25,50,25,100] assignments = ['hw ch 1','hw ch 2','quiz   ','hw ch 3','test'] students = {'#Max':max_points}   def print_menu():     print "1. Add student"     print "2. Remove student"     print "3. Print grades"     print "4. Record grade"     print "9. Exit"   def print_all_grades():     print '\t',     for i in range(len(assignments)):         print assignments[1],'\t',     print     keys = students.keys()     keys.sort()     for x in keys:         print x,'\t',         grades = students[x]         print_grades(grades)   def print_grades(grades):     for i in range(len(grades)):         print grades[i],'\t\t',     print   def choice():     return int(raw_input("Menu Choice: "))   def school():     return raw_input("Student: ")   while 1:     print_menu()     menu_choice = choice()     if menu_choice == 1:         print "Add student"         name = school()         students[name] = [0]*len(max_points)     elif menu_choice == 2:         print "Remove student"         name = school()         if students.has_key(name):             del students[name]         else:             print "Student: ",name," not found."     elif menu_choice == 3:         print_all_grades()       elif menu_choice == 4:         print "Record Grade"         name = school()         if students.has_key(name):             grades = students[name]             print "Type in the number of the grade to record"             print "Type in a 0 (zero) to exit"             for i in range(len(assignments)):                 print i+1,' ',assignments[i],'\t',             print             print_grades(grades)             which = 1234             while which != -1:                 which = int(raw_input("Change which Grade: ")                 which = which-1                 if 0 <= which < len(grades):                     grade = int(raw_input("Grade: ")                     grades[which] = grade                 elif which != -1:                     print "Invalid Grade Number"             else:                 print "Student not found"     elif menu_choice == 9:         break     else:         print "That's not a choice!" print "Goodbye." Thanks for the help in advance! Nathan

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