diff --git a/scripts/code.py b/scripts/code.py
index 8f5f0752..13ef0cc4 100755
--- a/scripts/code.py
+++ b/scripts/code.py
@@ -29,10 +29,10 @@ OBJDUMP_PATH = ['objdump']
 
 
 # integer fields
-class Int(co.namedtuple('Int', 'x')):
+class RInt(co.namedtuple('RInt', 'x')):
     __slots__ = ()
     def __new__(cls, x=0):
-        if isinstance(x, Int):
+        if isinstance(x, RInt):
             return x
         if isinstance(x, str):
             try:
@@ -110,12 +110,12 @@ class CodeResult(co.namedtuple('CodeResult', [
     _by = ['file', 'function']
     _fields = ['size']
     _sort = ['size']
-    _types = {'size': Int}
+    _types = {'size': RInt}
 
     __slots__ = ()
     def __new__(cls, file='', function='', size=0):
         return super().__new__(cls, file, function,
-            Int(size))
+            RInt(size))
 
     def __add__(self, other):
         return CodeResult(self.file, self.function,
diff --git a/scripts/cov.py b/scripts/cov.py
index 0390d152..e75c76f3 100755
--- a/scripts/cov.py
+++ b/scripts/cov.py
@@ -29,10 +29,10 @@ GCOV_PATH = ['gcov']
 
 
 # integer fields
-class Int(co.namedtuple('Int', 'x')):
+class RInt(co.namedtuple('RInt', 'x')):
     __slots__ = ()
     def __new__(cls, x=0):
-        if isinstance(x, Int):
+        if isinstance(x, RInt):
             return x
         if isinstance(x, str):
             try:
@@ -104,16 +104,16 @@ class Int(co.namedtuple('Int', 'x')):
         return self.__class__(self.x * other.x)
 
 # fractional fields, a/b
-class Frac(co.namedtuple('Frac', 'a,b')):
+class RFrac(co.namedtuple('RFrac', 'a,b')):
     __slots__ = ()
     def __new__(cls, a=0, b=None):
-        if isinstance(a, Frac) and b is None:
+        if isinstance(a, RFrac) and b is None:
             return a
         if isinstance(a, str) and b is None:
             a, b = a.split('/', 1)
         if b is None:
             b = a
-        return super().__new__(cls, Int(a), Int(b))
+        return super().__new__(cls, RInt(a), RInt(b))
 
     def __str__(self):
         return '%s/%s' % (self.a, self.b)
@@ -132,15 +132,15 @@ class Frac(co.namedtuple('Frac', 'a,b')):
             else '%.1f%%' % (100*t)]
 
     def diff(self, other):
-        new_a, new_b = self if self else (Int(0), Int(0))
-        old_a, old_b = other if other else (Int(0), Int(0))
+        new_a, new_b = self if self else (RInt(0), RInt(0))
+        old_a, old_b = other if other else (RInt(0), RInt(0))
         return '%11s' % ('%s/%s' % (
             new_a.diff(old_a).strip(),
             new_b.diff(old_b).strip()))
 
     def ratio(self, other):
-        new_a, new_b = self if self else (Int(0), Int(0))
-        old_a, old_b = other if other else (Int(0), Int(0))
+        new_a, new_b = self if self else (RInt(0), RInt(0))
+        old_a, old_b = other if other else (RInt(0), RInt(0))
         new = new_a.x/new_b.x if new_b.x else 1.0
         old = old_a.x/old_b.x if old_b.x else 1.0
         return new - old
@@ -176,14 +176,15 @@ class CovResult(co.namedtuple('CovResult', [
     _fields = ['calls', 'hits', 'funcs', 'lines', 'branches']
     _sort = ['funcs', 'lines', 'branches', 'hits', 'calls']
     _types = {
-        'calls': Int, 'hits': Int,
-        'funcs': Frac, 'lines': Frac, 'branches': Frac}
+        'calls': RInt, 'hits': RInt,
+        'funcs': RFrac, 'lines': RFrac, 'branches': RFrac}
 
     __slots__ = ()
     def __new__(cls, file='', function='', line=0,
             calls=0, hits=0, funcs=0, lines=0, branches=0):
-        return super().__new__(cls, file, function, int(Int(line)),
-            Int(calls), Int(hits), Frac(funcs), Frac(lines), Frac(branches))
+        return super().__new__(cls, file, function, int(RInt(line)),
+            RInt(calls), RInt(hits),
+            RFrac(funcs), RFrac(lines), RFrac(branches))
 
     def __add__(self, other):
         return CovResult(self.file, self.function, self.line,
@@ -265,7 +266,7 @@ def collect(gcda_paths, *,
                 results.append(CovResult(
                     file_name, func_name, func['start_line'],
                     func['execution_count'], 0,
-                    Frac(1 if func['execution_count'] > 0 else 0, 1),
+                    RFrac(1 if func['execution_count'] > 0 else 0, 1),
                     0,
                     0))
 
@@ -282,8 +283,8 @@ def collect(gcda_paths, *,
                     file_name, func_name, line['line_number'],
                     0, line['count'],
                     0,
-                    Frac(1 if line['count'] > 0 else 0, 1),
-                    Frac(
+                    RFrac(1 if line['count'] > 0 else 0, 1),
+                    RFrac(
                         sum(1 if branch['count'] > 0 else 0
                             for branch in line['branches']),
                         len(line['branches']))))
diff --git a/scripts/data.py b/scripts/data.py
index 18e99064..7e4edaee 100755
--- a/scripts/data.py
+++ b/scripts/data.py
@@ -29,10 +29,10 @@ OBJDUMP_PATH = ['objdump']
 
 
 # integer fields
-class Int(co.namedtuple('Int', 'x')):
+class RInt(co.namedtuple('RInt', 'x')):
     __slots__ = ()
     def __new__(cls, x=0):
-        if isinstance(x, Int):
+        if isinstance(x, RInt):
             return x
         if isinstance(x, str):
             try:
@@ -110,12 +110,12 @@ class DataResult(co.namedtuple('DataResult', [
     _by = ['file', 'function']
     _fields = ['size']
     _sort = ['size']
-    _types = {'size': Int}
+    _types = {'size': RInt}
 
     __slots__ = ()
     def __new__(cls, file='', function='', size=0):
         return super().__new__(cls, file, function,
-            Int(size))
+            RInt(size))
 
     def __add__(self, other):
         return DataResult(self.file, self.function,
diff --git a/scripts/perf.py b/scripts/perf.py
index 63d79e1e..a6161a9b 100755
--- a/scripts/perf.py
+++ b/scripts/perf.py
@@ -38,10 +38,10 @@ THRESHOLD = (0.5, 0.85)
 
 
 # integer fields
-class Int(co.namedtuple('Int', 'x')):
+class RInt(co.namedtuple('RInt', 'x')):
     __slots__ = ()
     def __new__(cls, x=0):
-        if isinstance(x, Int):
+        if isinstance(x, RInt):
             return x
         if isinstance(x, str):
             try:
@@ -121,16 +121,18 @@ class PerfResult(co.namedtuple('PerfResult', [
     _fields = ['cycles', 'bmisses', 'branches', 'cmisses', 'caches']
     _sort = ['cycles', 'bmisses', 'cmisses', 'branches', 'caches']
     _types = {
-        'cycles': Int,
-        'bmisses': Int, 'branches': Int,
-        'cmisses': Int, 'caches': Int}
+        'cycles': RInt,
+        'bmisses': RInt, 'branches': RInt,
+        'cmisses': RInt, 'caches': RInt}
 
     __slots__ = ()
     def __new__(cls, file='', function='', line=0,
             cycles=0, bmisses=0, branches=0, cmisses=0, caches=0,
             children=[]):
-        return super().__new__(cls, file, function, int(Int(line)),
-            Int(cycles), Int(bmisses), Int(branches), Int(cmisses), Int(caches),
+        return super().__new__(cls, file, function, int(RInt(line)),
+            RInt(cycles),
+            RInt(bmisses), RInt(branches),
+            RInt(cmisses), RInt(caches),
             children)
 
     def __add__(self, other):
diff --git a/scripts/perfbd.py b/scripts/perfbd.py
index 3c5b0607..290bbd46 100755
--- a/scripts/perfbd.py
+++ b/scripts/perfbd.py
@@ -29,10 +29,10 @@ THRESHOLD = (0.5, 0.85)
 
 
 # integer fields
-class Int(co.namedtuple('Int', 'x')):
+class RInt(co.namedtuple('RInt', 'x')):
     __slots__ = ()
     def __new__(cls, x=0):
-        if isinstance(x, Int):
+        if isinstance(x, RInt):
             return x
         if isinstance(x, str):
             try:
@@ -111,14 +111,14 @@ class PerfBdResult(co.namedtuple('PerfBdResult', [
     _by = ['file', 'function', 'line']
     _fields = ['readed', 'proged', 'erased']
     _sort = ['erased', 'proged', 'readed']
-    _types = {'readed': Int, 'proged': Int, 'erased': Int}
+    _types = {'readed': RInt, 'proged': RInt, 'erased': RInt}
 
     __slots__ = ()
     def __new__(cls, file='', function='', line=0,
             readed=0, proged=0, erased=0,
             children=[]):
-        return super().__new__(cls, file, function, int(Int(line)),
-            Int(readed), Int(proged), Int(erased),
+        return super().__new__(cls, file, function, int(RInt(line)),
+            RInt(readed), RInt(proged), RInt(erased),
             children)
 
     def __add__(self, other):
diff --git a/scripts/stack.py b/scripts/stack.py
index f685dea5..058a65c0 100755
--- a/scripts/stack.py
+++ b/scripts/stack.py
@@ -20,10 +20,10 @@ import re
 
 
 # integer fields
-class Int(co.namedtuple('Int', 'x')):
+class RInt(co.namedtuple('RInt', 'x')):
     __slots__ = ()
     def __new__(cls, x=0):
-        if isinstance(x, Int):
+        if isinstance(x, RInt):
             return x
         if isinstance(x, str):
             try:
@@ -100,13 +100,13 @@ class StackResult(co.namedtuple('StackResult', [
     _by = ['file', 'function']
     _fields = ['frame', 'limit']
     _sort = ['limit', 'frame']
-    _types = {'frame': Int, 'limit': Int}
+    _types = {'frame': RInt, 'limit': RInt}
 
     __slots__ = ()
     def __new__(cls, file='', function='',
             frame=0, limit=0, children=set()):
         return super().__new__(cls, file, function,
-            Int(frame), Int(limit),
+            RInt(frame), RInt(limit),
             children)
 
     def __add__(self, other):
diff --git a/scripts/structs.py b/scripts/structs.py
index 571d01af..c1a51ac6 100755
--- a/scripts/structs.py
+++ b/scripts/structs.py
@@ -25,10 +25,10 @@ OBJDUMP_PATH = ['objdump']
 
 
 # integer fields
-class Int(co.namedtuple('Int', 'x')):
+class RInt(co.namedtuple('RInt', 'x')):
     __slots__ = ()
     def __new__(cls, x=0):
-        if isinstance(x, Int):
+        if isinstance(x, RInt):
             return x
         if isinstance(x, str):
             try:
@@ -104,12 +104,12 @@ class StructResult(co.namedtuple('StructResult', ['file', 'struct', 'size'])):
     _by = ['file', 'struct']
     _fields = ['size']
     _sort = ['size']
-    _types = {'size': Int}
+    _types = {'size': RInt}
 
     __slots__ = ()
     def __new__(cls, file='', struct='', size=0):
         return super().__new__(cls, file, struct,
-            Int(size))
+            RInt(size))
 
     def __add__(self, other):
         return StructResult(self.file, self.struct,
diff --git a/scripts/summary.py b/scripts/summary.py
index 4d267ca9..c41296e7 100755
--- a/scripts/summary.py
+++ b/scripts/summary.py
@@ -30,14 +30,14 @@ OPS = {
     'prod':    lambda xs: m.prod(xs[1:], start=xs[0]),
     'min':     min,
     'max':     max,
-    'avg':     lambda xs: Float(sum(float(x) for x in xs) / len(xs)),
+    'avg':     lambda xs: RFloat(sum(float(x) for x in xs) / len(xs)),
     'stddev':  lambda xs: (
-        lambda avg: Float(
+        lambda avg: RFloat(
             m.sqrt(sum((float(x) - avg)**2 for x in xs) / len(xs)))
         )(sum(float(x) for x in xs) / len(xs)),
-    'gmean':   lambda xs: Float(m.prod(float(x) for x in xs)**(1/len(xs))),
+    'gmean':   lambda xs: RFloat(m.prod(float(x) for x in xs)**(1/len(xs))),
     'gstddev': lambda xs: (
-        lambda gmean: Float(
+        lambda gmean: RFloat(
             m.exp(m.sqrt(sum(m.log(float(x)/gmean)**2 for x in xs) / len(xs)))
             if gmean else m.inf)
         )(m.prod(float(x) for x in xs)**(1/len(xs))),
@@ -45,10 +45,10 @@ OPS = {
 
 
 # integer fields
-class Int(co.namedtuple('Int', 'x')):
+class RInt(co.namedtuple('RInt', 'x')):
     __slots__ = ()
     def __new__(cls, x=0):
-        if isinstance(x, Int):
+        if isinstance(x, RInt):
             return x
         if isinstance(x, str):
             try:
@@ -120,10 +120,10 @@ class Int(co.namedtuple('Int', 'x')):
         return self.__class__(self.x * other.x)
 
 # float fields
-class Float(co.namedtuple('Float', 'x')):
+class RFloat(co.namedtuple('RFloat', 'x')):
     __slots__ = ()
     def __new__(cls, x=0.0):
-        if isinstance(x, Float):
+        if isinstance(x, RFloat):
             return x
         if isinstance(x, str):
             try:
@@ -150,8 +150,8 @@ class Float(co.namedtuple('Float', 'x')):
     def __float__(self):
         return float(self.x)
 
-    none = Int.none
-    table = Int.table
+    none = RInt.none
+    table = RInt.table
 
     def diff(self, other):
         new = self.x if self else 0
@@ -164,22 +164,22 @@ class Float(co.namedtuple('Float', 'x')):
         else:
             return '%+7.1f' % diff
 
-    ratio = Int.ratio
-    __add__ = Int.__add__
-    __sub__ = Int.__sub__
-    __mul__ = Int.__mul__
+    ratio = RInt.ratio
+    __add__ = RInt.__add__
+    __sub__ = RInt.__sub__
+    __mul__ = RInt.__mul__
 
 # fractional fields, a/b
-class Frac(co.namedtuple('Frac', 'a,b')):
+class RFrac(co.namedtuple('RFrac', 'a,b')):
     __slots__ = ()
     def __new__(cls, a=0, b=None):
-        if isinstance(a, Frac) and b is None:
+        if isinstance(a, RFrac) and b is None:
             return a
         if isinstance(a, str) and b is None:
             a, b = a.split('/', 1)
         if b is None:
             b = a
-        return super().__new__(cls, Int(a), Int(b))
+        return super().__new__(cls, RInt(a), RInt(b))
 
     def __str__(self):
         return '%s/%s' % (self.a, self.b)
@@ -198,15 +198,15 @@ class Frac(co.namedtuple('Frac', 'a,b')):
             else '%.1f%%' % (100*t)]
 
     def diff(self, other):
-        new_a, new_b = self if self else (Int(0), Int(0))
-        old_a, old_b = other if other else (Int(0), Int(0))
+        new_a, new_b = self if self else (RInt(0), RInt(0))
+        old_a, old_b = other if other else (RInt(0), RInt(0))
         return '%11s' % ('%s/%s' % (
             new_a.diff(old_a).strip(),
             new_b.diff(old_b).strip()))
 
     def ratio(self, other):
-        new_a, new_b = self if self else (Int(0), Int(0))
-        old_a, old_b = other if other else (Int(0), Int(0))
+        new_a, new_b = self if self else (RInt(0), RInt(0))
+        old_a, old_b = other if other else (RInt(0), RInt(0))
         new = new_a.x/new_b.x if new_b.x else 1.0
         old = old_a.x/old_b.x if old_b.x else 1.0
         return new - old
@@ -236,9 +236,9 @@ class Frac(co.namedtuple('Frac', 'a,b')):
 
 # available types
 TYPES = co.OrderedDict([
-    ('int',   Int),
-    ('float', Float),
-    ('frac',  Frac)
+    ('int',   RInt),
+    ('float', RFloat),
+    ('frac',  RFrac)
 ])