diff --git a/frappe/utils/inplacevar.py b/frappe/utils/inplacevar.py
index 6885d8be46..d8195c17c7 100644
--- a/frappe/utils/inplacevar.py
+++ b/frappe/utils/inplacevar.py
@@ -18,110 +18,107 @@ valid_inplace_types = (list, set)
 
 
 inplace_slots = {
-    '+=': '__iadd__',
-    '-=': '__isub__',
-    '*=': '__imul__',
-    '/=': (1 / 2 == 0) and '__idiv__' or '__itruediv__',
-    '//=': '__ifloordiv__',
-    '%=': '__imod__',
-    '**=': '__ipow__',
-    '<<=': '__ilshift__',
-    '>>=': '__irshift__',
-    '&=': '__iand__',
-    '^=': '__ixor__',
-    '|=': '__ior__',
+	"+=": "__iadd__",
+	"-=": "__isub__",
+	"*=": "__imul__",
+	"/=": ((1 / 2 == 0) and "__idiv__") or "__itruediv__",
+	"//=": "__ifloordiv__",
+	"%=": "__imod__",
+	"**=": "__ipow__",
+	"<<=": "__ilshift__",
+	">>=": "__irshift__",
+	"&=": "__iand__",
+	"^=": "__ixor__",
+	"|=": "__ior__",
 }
 
 
 def __iadd__(x, y):
-    x += y
-    return x
+	x += y
+	return x
 
 
 def __isub__(x, y):
-    x -= y
-    return x
+	x -= y
+	return x
 
 
 def __imul__(x, y):
-    x *= y
-    return x
+	x *= y
+	return x
 
 
 def __idiv__(x, y):
-    x /= y
-    return x
+	x /= y
+	return x
 
 
 def __ifloordiv__(x, y):
-    x //= y
-    return x
+	x //= y
+	return x
 
 
 def __imod__(x, y):
-    x %= y
-    return x
+	x %= y
+	return x
 
 
 def __ipow__(x, y):
-    x **= y
-    return x
+	x **= y
+	return x
 
 
 def __ilshift__(x, y):
-    x <<= y
-    return x
+	x <<= y
+	return x
 
 
 def __irshift__(x, y):
-    x >>= y
-    return x
+	x >>= y
+	return x
 
 
 def __iand__(x, y):
-    x &= y
-    return x
+	x &= y
+	return x
 
 
 def __ixor__(x, y):
-    x ^= y
-    return x
+	x ^= y
+	return x
 
 
 def __ior__(x, y):
-    x |= y
-    return x
+	x |= y
+	return x
 
 
 inplace_ops = {
-    '+=': __iadd__,
-    '-=': __isub__,
-    '*=': __imul__,
-    '/=': __idiv__,
-    '//=': __ifloordiv__,
-    '%=': __imod__,
-    '**=': __ipow__,
-    '<<=': __ilshift__,
-    '>>=': __irshift__,
-    '&=': __iand__,
-    '^=': __ixor__,
-    '|=': __ior__,
+	"+=": __iadd__,
+	"-=": __isub__,
+	"*=": __imul__,
+	"/=": __idiv__,
+	"//=": __ifloordiv__,
+	"%=": __imod__,
+	"**=": __ipow__,
+	"<<=": __ilshift__,
+	">>=": __irshift__,
+	"&=": __iand__,
+	"^=": __ixor__,
+	"|=": __ior__,
 }
 
 
 def protected_inplacevar(op, var, expr):
-    """Do an inplace operation
+	"""Do an inplace operation
 
-    If the var has an inplace slot, then disallow the operation
-    unless the var an instance of ``valid_inplace_types``.
-    """
-    if hasattr(var, inplace_slots[op]) and \
-       not isinstance(var, valid_inplace_types):
-        try:
-            cls = var.__class__
-        except AttributeError:
-            cls = type(var)
-        raise TypeError(
-            "Augmented assignment to %s objects is not allowed"
-            " in untrusted code" % cls.__name__)
-    return inplace_ops[op](var, expr)
+	If the var has an inplace slot, then disallow the operation
+	unless the var an instance of ``valid_inplace_types``.
+	"""
+	if hasattr(var, inplace_slots[op]) and not isinstance(var, valid_inplace_types):
+		try:
+			cls = var.__class__
+		except AttributeError:
+			cls = type(var)
+		raise TypeError("Augmented assignment to %s objects is not allowed in untrusted code" % cls.__name__)
+	return inplace_ops[op](var, expr)