[minor] fix date comparisons
diff --git a/erpnext/schools/doctype/academic_term/academic_term.py b/erpnext/schools/doctype/academic_term/academic_term.py
index 891feb8..4510348 100644
--- a/erpnext/schools/doctype/academic_term/academic_term.py
+++ b/erpnext/schools/doctype/academic_term/academic_term.py
@@ -5,34 +5,34 @@
 from __future__ import unicode_literals
 import frappe
 from frappe import msgprint, _
-from frappe.utils import get_datetime, get_datetime_str
+from frappe.utils import get_datetime
 from frappe.model.document import Document
 
 class AcademicTerm(Document):
     def autoname(self):
         self.name = self.academic_year + " ({})".format(self.term_name) if self.term_name else ""
-        
+
     def validate(self):
         #Check if entry with same academic_year and the term_name already exists
         validate_duplication(self)
         self.title = self.academic_year + " ({})".format(self.term_name) if self.term_name else ""
-        
+
         #Check that start of academic year is earlier than end of academic year
         if self.term_start_date and self.term_end_date and self.term_start_date > self.term_end_date:
             frappe.throw(_("The Term End Date cannot be earlier than the Term Start Date. Please correct the dates and try again."))
-        
-        """Check that the start of the term is not before the start of the academic year and end of term is not after 
+
+        """Check that the start of the term is not before the start of the academic year and end of term is not after
             the end of the academic year"""
         year = frappe.get_doc("Academic Year",self.academic_year)
-        if self.term_start_date and get_datetime_str(year.year_start_date) and (self.term_start_date < get_datetime_str(year.year_start_date)):
+        if self.term_start_date and get_datetime(year.year_start_date) and (self.term_start_date < get_datetime(year.year_start_date)):
             frappe.throw(_("The Term Start Date cannot be earlier than the Year Start Date of the Academic Year to which the term is linked (Academic Year {}). Please correct the dates and try again.").format(self.academic_year))
-        
-        if self.term_end_date and get_datetime_str(year.year_end_date) and (self.term_end_date > get_datetime_str(year.year_end_date)):
+
+        if self.term_end_date and get_datetime_(year.year_end_date) and (self.term_end_date > get_datetime(year.year_end_date)):
             frappe.throw(_("The Term End Date cannot be later than the Year End Date of the Academic Year to which the term is linked (Academic Year {}). Please correct the dates and try again.").format(self.academic_year))
 
 
 def validate_duplication(self):
-    term = frappe.db.sql("""select name from `tabAcademic Term` where academic_year= %s and term_name= %s 
+    term = frappe.db.sql("""select name from `tabAcademic Term` where academic_year= %s and term_name= %s
     and docstatus<2 and name != %s""", (self.academic_year, self.term_name, self.name))
     if term:
         frappe.throw(_("An academic term with this 'Academic Year' {0} and 'Term Name' {1} already exists. Please modify these entries and try again.").format(self.academic_year,self.term_name))