urwid & mitmproxy install on OSX http://pastebin.com/rAd9Bt7E

gistfile1.txt

$ workon pen

$ git clone git://github.com/wardi/urwid.git

$ cd urwid

$ gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch i386 -arch x86_64 -pipe -I/System/Library/Frameworks/Python.framework/Versions/2.6/include/python2.6 -c source/str_util.c -o build/temp.macosx-10.6-universal-2.6/source/str_util.o

$ python setup.py build
$ python setup.py install

$ git clone https://github.com/cortesi/mitmproxy.git

$ cd mitmproxy

# source/libmproxy/console.py を修正

diff --git a/libmproxy/console.py b/libmproxy/console.py
index 399640c..d655e53 100644
--- a/libmproxy/console.py
+++ b/libmproxy/console.py
@@ -117,7 +117,7 @@ def int_version(v):
     v = urwid.__version__.split(".")
     x = 0
     for i in range(min(SIG, len(v))):
-        x += int(v[i]) * 10**(SIG-i)
+        x += int(v[i].split('-')[0]) * 10**(SIG-i)
     return x
     
$ python setup.py build
$ python setup.py install

$ mitmproxy --help 
Usage: mitmproxy [options] [flowdump path]

Options:
  --version             show program's version number and exit
  -h, --help            show this help message and exit
  -a ADDR               Address to bind proxy to (defaults to all interfaces)
  --confdir=CONFDIR     Configuration directory. (~/.mitmproxy)
  -p PORT               Proxy service port.
  -q                    Quiet.
  --anticache           Strip out request headers that might cause the server
                        to return 304-not-modified.
  --reqscript=REQUEST_SCRIPT
                        Script to run when a request is recieved.
  --respscript=RESPONSE_SCRIPT
                        Script to run when a response is recieved.
  -t                    Set sticky cookie for all requests.
  -T FILTER             Set sticky cookie filter. Matched against requests.
  -u                    Set sticky auth for all requests.
  -U FILTER             Set sticky auth filter. Matched against requests.
  -v                    Increase verbosity. Can be passed multiple times.
  -w WFILE              Write flows to file.
  --debug               

  Client Replay:
    -c PATH             Replay client requests from a saved file.

  Server Replay:
    -s PATH             Replay server responses from a saved file.
    -k                  Kill extra requests during replay.
    --rheader=RHEADERS  Request headers to be considered during replay. Can be
                        passed multiple times.
    --norefresh         Disable response refresh, which updates times in
                        cookies and headers for replayed responses.

  SSL:
    --cert=CERT         User-created SSL certificate file.
    --ciphers=CIPHERS   SSL ciphers.

  Filters:
    See help in mitmproxy for filter expression syntax.

    -l LIMIT, --limit=LIMIT
                        Limit filter expression.
    -i INTERCEPT, --intercept=INTERCEPT
                        Intercept filter expression.
                        
$ mitmdump --help
Usage: mitmdump [options] [filter]

Options:
  --version             show program's version number and exit
  -h, --help            show this help message and exit
  -a ADDR               Address to bind proxy to (defaults to all interfaces)
  --confdir=CONFDIR     Configuration directory. (~/.mitmproxy)
  -p PORT               Proxy service port.
  -q                    Quiet.
  --anticache           Strip out request headers that might cause the server
                        to return 304-not-modified.
  --reqscript=REQUEST_SCRIPT
                        Script to run when a request is recieved.
  --respscript=RESPONSE_SCRIPT
                        Script to run when a response is recieved.
  -t                    Set sticky cookie for all requests.
  -T FILTER             Set sticky cookie filter. Matched against requests.
  -u                    Set sticky auth for all requests.
  -U FILTER             Set sticky auth filter. Matched against requests.
  -v                    Increase verbosity. Can be passed multiple times.
  -w WFILE              Write flows to file.
  --keepserving         Continue serving after playback. We exit by default.

  Client Replay:
    -c PATH             Replay client requests from a saved file.

  Server Replay:
    -s PATH             Replay server responses from a saved file.
    -k                  Kill extra requests during replay.
    --rheader=RHEADERS  Request headers to be considered during replay. Can be
                        passed multiple times.
    --norefresh         Disable response refresh, which updates times in
                        cookies and headers for replayed responses.

  SSL:
    --cert=CERT         User-created SSL certificate file.
    --ciphers=CIPHERS   SSL ciphers.

This worked for me (OSX 10.7.3, system python 2.7.1):

sudo env ARCHFLAGS="-arch i386" easy_install http://excess.org/urwid/urwid-1.0.1.tar.gz