diff --git a/PIL/JpegImagePlugin.py b/PIL/JpegImagePlugin.py
index 0ed1fc73f..00026c4f7 100644
--- a/PIL/JpegImagePlugin.py
+++ b/PIL/JpegImagePlugin.py
@@ -399,7 +399,7 @@ def _fixup_dict(src_dict):
     # returns a dict with any single item tuples/lists as individual values
     def _fixup(value):
         try:
-            if len(value) == 1 and type(value) != type({}):
+            if len(value) == 1 and not isinstance(value, dict):
                 return value[0]
         except: pass
         return value
diff --git a/PIL/TiffImagePlugin.py b/PIL/TiffImagePlugin.py
index 99beb0f97..ad6939c26 100644
--- a/PIL/TiffImagePlugin.py
+++ b/PIL/TiffImagePlugin.py
@@ -1119,18 +1119,19 @@ class TiffImageFile(ImageFile.ImageFile):
         if DEBUG:
             print("- size:", self.size)
 
-        format = self.tag_v2.get(SAMPLEFORMAT, (1,))
-        if len(format) > 1 and max(format) == min(format) == 1:
+        sampleFormat = self.tag_v2.get(SAMPLEFORMAT, (1,))
+        if (len(sampleFormat) > 1
+            and max(sampleFormat) == min(sampleFormat) == 1):
             # SAMPLEFORMAT is properly per band, so an RGB image will
             # be (1,1,1).  But, we don't support per band pixel types,
             # and anything more than one band is a uint8. So, just
             # take the first element. Revisit this if adding support
             # for more exotic images.
-            format = (1,)
+            sampleFormat = (1,)
 
         # mode: check photometric interpretation and bits per pixel
         key = (
-            self.tag_v2.prefix, photo, format, fillorder,
+            self.tag_v2.prefix, photo, sampleFormat, fillorder,
             self.tag_v2.get(BITSPERSAMPLE, (1,)),
             self.tag_v2.get(EXTRASAMPLES, ())
             )
@@ -1215,7 +1216,7 @@ class TiffImageFile(ImageFile.ImageFile):
                 # https://github.com/python-pillow/Pillow/issues/279
                 if fillorder == 2:
                     key = (
-                        self.tag_v2.prefix, photo, format, 1,
+                        self.tag_v2.prefix, photo, sampleFormat, 1,
                         self.tag_v2.get(BITSPERSAMPLE, (1,)),
                         self.tag_v2.get(EXTRASAMPLES, ())
                         )
diff --git a/Scripts/enhancer.py b/Scripts/enhancer.py
index 6393c983f..bf79dfe48 100644
--- a/Scripts/enhancer.py
+++ b/Scripts/enhancer.py
@@ -39,7 +39,7 @@ class Enhance(Frame):
         s.pack()
 
     def update(self, value):
-        self.value = eval(value)
+        self.value = float(value)
         self.tkim.paste(self.enhancer.enhance(self.value))
 
 #
diff --git a/Scripts/pildriver.py b/Scripts/pildriver.py
index 0ede74db5..cc425ad08 100644
--- a/Scripts/pildriver.py
+++ b/Scripts/pildriver.py
@@ -208,9 +208,9 @@ class PILDriver(object):
         Process the top image with the given filter.
         """
         from PIL import ImageFilter
-        filter = eval("ImageFilter." + self.do_pop().upper())
+        imageFilter = getattr(ImageFilter, self.do_pop().upper())
         image = self.do_pop()
-        self.push(image.filter(filter))
+        self.push(image.filter(imageFilter))
 
     def do_getbbox(self):
         """usage: getbbox
diff --git a/Scripts/thresholder.py b/Scripts/thresholder.py
index bfeebfa9f..50c4bbcd2 100644
--- a/Scripts/thresholder.py
+++ b/Scripts/thresholder.py
@@ -42,7 +42,7 @@ class UI(Frame):
         # self.redraw()
 
     def update_scale(self, value):
-        self.value = eval(value)
+        self.value = float(value)
 
         self.redraw()
 
diff --git a/Tests/test_file_tiff.py b/Tests/test_file_tiff.py
index ca0816351..22915a735 100644
--- a/Tests/test_file_tiff.py
+++ b/Tests/test_file_tiff.py
@@ -251,8 +251,8 @@ class TestFileTiff(PillowTestCase):
         filename = "Tests/images/pil136.tiff"
         im = Image.open(filename)
 
-        self.assert_warning(DeprecationWarning, lambda: im.tag_v2.as_dict())
-        self.assert_warning(DeprecationWarning, lambda: im.tag.as_dict())
+        self.assert_warning(DeprecationWarning, im.tag_v2.as_dict)
+        self.assert_warning(DeprecationWarning, im.tag.as_dict)
 
     def test_dict(self):
         # Arrange
diff --git a/Tests/test_imagepath.py b/Tests/test_imagepath.py
index 0354b0fd9..03e685461 100644
--- a/Tests/test_imagepath.py
+++ b/Tests/test_imagepath.py
@@ -66,7 +66,7 @@ class TestImagePath(PillowTestCase):
         try:
             # post patch, this fails with a memory error
             x = evil()
-            
+
             # This fails due to the invalid malloc above,
             # and segfaults
             for i in range(200000):
@@ -85,15 +85,15 @@ class TestImagePath(PillowTestCase):
 
 
 class evil:
-	def __init__(self):
-		self.corrupt = Image.core.path(0x4000000000000000)
+    def __init__(self):
+        self.corrupt = Image.core.path(0x4000000000000000)
 
-	def __getitem__(self, i):
-		x = self.corrupt[i]
-		return struct.pack("dd", x[0], x[1])
+    def __getitem__(self, i):
+        x = self.corrupt[i]
+        return struct.pack("dd", x[0], x[1])
 
-	def __setitem__(self, i, x):
-		self.corrupt[i] = struct.unpack("dd", x)
+    def __setitem__(self, i, x):
+        self.corrupt[i] = struct.unpack("dd", x)
 
 
 if __name__ == '__main__':
diff --git a/profile-installed.py b/profile-installed.py
index c319c2899..e3a04c21c 100755
--- a/profile-installed.py
+++ b/profile-installed.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-import nose
 import os
 import sys
 import glob