diff --git a/pdfminer/cmapdb.py b/pdfminer/cmapdb.py
index fdd6a53..5945cf5 100644
--- a/pdfminer/cmapdb.py
+++ b/pdfminer/cmapdb.py
@@ -12,16 +12,15 @@ More information is available on the Adobe website:
 """
 
 import sys
-import re
 import os
 import os.path
 import gzip
 import cPickle as pickle
 import struct
 from psparser import PSStackParser
-from psparser import PSException, PSSyntaxError, PSTypeError, PSEOF
-from psparser import PSLiteral, PSKeyword
-from psparser import literal_name, keyword_name
+from psparser import PSSyntaxError, PSEOF
+from psparser import PSLiteral
+from psparser import literal_name
 from encodingdb import name2unicode
 from utils import choplist, nunpack
 
diff --git a/pdfminer/converter.py b/pdfminer/converter.py
index 08758a8..3788d5a 100644
--- a/pdfminer/converter.py
+++ b/pdfminer/converter.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 import sys
-from pdfdevice import PDFDevice, PDFTextDevice
+from pdfdevice import PDFTextDevice
 from pdffont import PDFUnicodeNotDefined
 from layout import LTContainer, LTPage, LTText, LTLine, LTRect, LTCurve
 from layout import LTFigure, LTImage, LTChar, LTTextLine
diff --git a/pdfminer/image.py b/pdfminer/image.py
index 2ac41be..c656729 100644
--- a/pdfminer/image.py
+++ b/pdfminer/image.py
@@ -1,7 +1,5 @@
 #!/usr/bin/env python
 import cStringIO
-import logging
-import sys
 import struct
 import os, os.path
 from pdftypes import LITERALS_DCT_DECODE
diff --git a/pdfminer/layout.py b/pdfminer/layout.py
index 9b7e030..5cb4262 100644
--- a/pdfminer/layout.py
+++ b/pdfminer/layout.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-import sys
 from utils import INF, Plane, get_bound, uniq, csort, fsplit
 from utils import bbox2str, matrix2str, apply_matrix_pt
 
diff --git a/pdfminer/pdfdevice.py b/pdfminer/pdfdevice.py
index aab901b..3ec9551 100644
--- a/pdfminer/pdfdevice.py
+++ b/pdfminer/pdfdevice.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-import sys
 from utils import mult_matrix, translate_matrix
 from utils import enc, bbox2str
 from pdffont import PDFUnicodeNotDefined
diff --git a/pdfminer/pdfdocument.py b/pdfminer/pdfdocument.py
index bce75cd..fc41a55 100644
--- a/pdfminer/pdfdocument.py
+++ b/pdfminer/pdfdocument.py
@@ -11,8 +11,8 @@ from psparser import literal_name
 from psparser import LIT, KWD, STRICT
 from pdftypes import PDFException, PDFTypeError, PDFNotImplementedError
 from pdftypes import PDFObjectNotFound, PDFStream
-from pdftypes import resolve1, decipher_all
-from pdftypes import int_value, float_value, num_value
+from pdftypes import decipher_all
+from pdftypes import int_value
 from pdftypes import str_value, list_value, dict_value, stream_value
 from pdfparser import PDFSyntaxError
 from pdfparser import PDFStreamParser
diff --git a/pdfminer/pdffont.py b/pdfminer/pdffont.py
index 7bb1ae8..b6e20b9 100644
--- a/pdfminer/pdffont.py
+++ b/pdfminer/pdffont.py
@@ -8,12 +8,12 @@ except ImportError:
 from cmapdb import CMapDB, CMapParser, FileUnicodeMap, CMap
 from encodingdb import EncodingDB, name2unicode
 from psparser import PSStackParser
-from psparser import PSSyntaxError, PSEOF
+from psparser import PSEOF
 from psparser import LIT, KWD, STRICT
 from psparser import PSLiteral, literal_name
 from pdftypes import PDFException, resolve1
-from pdftypes import int_value, float_value, num_value
-from pdftypes import str_value, list_value, dict_value, stream_value
+from pdftypes import int_value, num_value
+from pdftypes import list_value, dict_value, stream_value
 from fontmetrics import FONT_METRICS
 from utils import apply_matrix_norm, nunpack, choplist
 
diff --git a/pdfminer/pdfinterp.py b/pdfminer/pdfinterp.py
index e80b1bd..b25e107 100644
--- a/pdfminer/pdfinterp.py
+++ b/pdfminer/pdfinterp.py
@@ -6,20 +6,16 @@ try:
 except ImportError:
     from StringIO import StringIO
 from cmapdb import CMapDB, CMap
-from psparser import PSException, PSTypeError, PSEOF
+from psparser import PSTypeError, PSEOF
 from psparser import PSKeyword, literal_name, keyword_name
 from psparser import PSStackParser
 from psparser import LIT, KWD, STRICT
 from pdftypes import PDFException, PDFStream, PDFObjRef
 from pdftypes import resolve1
-from pdftypes import int_value, float_value, num_value
-from pdftypes import str_value, list_value, dict_value, stream_value
+from pdftypes import list_value, dict_value, stream_value
 from pdffont import PDFFontError
 from pdffont import PDFType1Font, PDFTrueTypeFont, PDFType3Font
 from pdffont import PDFCIDFont
-from pdfparser import PDFParser
-from pdfdocument import PDFDocument
-from pdfdocument import PDFPasswordIncorrect
 from pdfcolor import PDFColorSpace
 from pdfcolor import PREDEFINED_COLORSPACE
 from pdfcolor import LITERAL_DEVICE_GRAY, LITERAL_DEVICE_RGB
diff --git a/pdfminer/pdfpage.py b/pdfminer/pdfpage.py
index 5beb7b8..9d1255c 100644
--- a/pdfminer/pdfpage.py
+++ b/pdfminer/pdfpage.py
@@ -1,10 +1,9 @@
 #!/usr/bin/env python
 import sys
-from psparser import LIT, KWD, STRICT
+from psparser import LIT
 from pdftypes import PDFObjectNotFound
 from pdftypes import resolve1
-from pdftypes import int_value, float_value, num_value
-from pdftypes import str_value, list_value, dict_value, stream_value
+from pdftypes import int_value, list_value, dict_value
 from pdfparser import PDFParser
 from pdfdocument import PDFDocument
 from pdfdocument import PDFEncryptionError
diff --git a/pdfminer/pdfparser.py b/pdfminer/pdfparser.py
index cfcd917..7a0882b 100644
--- a/pdfminer/pdfparser.py
+++ b/pdfminer/pdfparser.py
@@ -9,8 +9,8 @@ from psparser import PSSyntaxError, PSEOF
 from psparser import KWD, STRICT
 from pdftypes import PDFException
 from pdftypes import PDFStream, PDFObjRef
-from pdftypes import int_value, float_value, num_value
-from pdftypes import str_value, list_value, dict_value, stream_value
+from pdftypes import int_value
+from pdftypes import dict_value
 
 
 ##  Exceptions
diff --git a/pdfminer/pdftypes.py b/pdfminer/pdftypes.py
index a698268..6a36c5f 100644
--- a/pdfminer/pdftypes.py
+++ b/pdfminer/pdftypes.py
@@ -1,12 +1,11 @@
 #!/usr/bin/env python
-import sys
 import zlib
 from lzw import lzwdecode
 from ascii85 import ascii85decode, asciihexdecode
 from runlength import rldecode
 from ccitt import ccittfaxdecode
 from psparser import PSException, PSObject
-from psparser import LIT, KWD, STRICT
+from psparser import LIT, STRICT
 from utils import apply_png_predictor
 
 LITERAL_CRYPT = LIT('Crypt')
diff --git a/pdfminer/rijndael.py b/pdfminer/rijndael.py
index cd41825..d0b8f08 100644
--- a/pdfminer/rijndael.py
+++ b/pdfminer/rijndael.py
@@ -10,7 +10,6 @@ by Philip J. Erdelsky:
 
 """
 
-import sys
 import struct
 
 def KEYLENGTH(keybits): return (keybits)/8
diff --git a/pdfminer/runlength.py b/pdfminer/runlength.py
index e17389e..f05e14d 100644
--- a/pdfminer/runlength.py
+++ b/pdfminer/runlength.py
@@ -6,8 +6,6 @@
 #  * public domain *
 #
 
-import sys
-
 def rldecode(data):
     """
     RunLength decoder (Adobe version) implementation based on PDF Reference
diff --git a/tools/prof.py b/tools/prof.py
index ae5d596..31c3042 100644
--- a/tools/prof.py
+++ b/tools/prof.py
@@ -2,7 +2,6 @@
 import sys
 
 def prof_main(argv):
-    import getopt
     import hotshot, hotshot.stats
     def usage():
         print 'usage: %s module.function [args ...]' % argv[0]