Added example file and extended example in readme

README.rst

@@ -17,11 +17,11 @@ Installation
 
 ::
 
-   $ pip install py3kwarn
+    $ pip install py3kwarn
 
 ...or to install from the git repository::
 
-   $ pip install -e git+git://github.com/liamcurry/py3kwarn.git#egg=py3kwarn
+    $ pip install -e git+git://github.com/liamcurry/py3kwarn.git#egg=py3kwarn
 
 Usage with vim
 --------------
@@ -30,14 +30,28 @@ You can use py3kwarn `with syntastic`_. If you want to use py3kwarn with
 another syntax checker (like flake8), then you will have to add this to your
 vim config::
 
-   let g:syntastic_python_checkers=['flake8', 'py3kwarn']
+    let g:syntastic_python_checkers=['flake8', 'py3kwarn']
 
 Usage from the command line
 ---------------------------
 
 ::
 
-   $ py3kwarn [filename]
+    $ py3kwarn example.py
+    example.py:2:1: PY3K (FixApply) apply(hello, args, kwargs) -> hello(*args, **kwargs)
+    example.py:5:1: PY3K (FixBasestring) basestring -> str
+    example.py:11:1: PY3K (FixCallable) callable('hello') -> isinstance('hello', collections.Callable)
+    example.py:14:1: PY3K (FixDict) d.keys() -> list(d.keys())
+    example.py:15:1: PY3K (FixDict) d.iteritems(); -> iter(d.items());
+    example.py:16:1: PY3K (FixDict) d.viewvalues(); -> d.values();
+    example.py:19:1: PY3K (FixExcept) try:import asdf;except E, T:pass; -> try:import asdf;except E as T:pass;
+    example.py:25:1: PY3K (FixExec) exec code in ns1, ns2; -> exec(code, ns1, ns2);
+    example.py:28:1: PY3K (FixExecfile) execfile('test.py') -> exec(compile(open('test.py').read(), 'test.py', 'exec'))
+    example.py:31:1: PY3K (FixFilter) filter(lambda x: x, [1, 2, 3]) -> [x for x in [1, 2, 3] if x]
+    example.py:41:1: PY3K (FixFuture) from __future__ import absolute_import ->
+    example.py:44:1: PY3K (FixHasKey) d.has_key('foobar') -> 'foobar' in d
+    example.py:56:1: PY3K (FixInput) input('FixInput') -> eval(input('FixInput'))
+    example.py:59:1: PY3K (FixIntern) intern(s) -> sys.intern(s)
 
 Testing
 -------

example.py

@@ -0,0 +1,77 @@
+# FixApply
+apply(hello, args, kwargs)
+
+# FixBasestring
+basestring
+
+# FixBuffer
+buffer('hello', 1, 3)
+
+# FixCallable
+callable('hello')
+
+# FixDict
+d.keys()
+d.iteritems()
+d.viewvalues()
+
+# FixExcept
+try:
+    import asdf
+except E, T:
+    pass
+
+# FixExec
+exec code in ns1, ns2
+
+# FixExecfile
+execfile('test.py')
+
+# FixFilter
+filter(lambda x: x, [1, 2, 3])
+
+# FixFuncattrs
+def test():
+    pass
+test.func_name
+test.func_closure
+test.func_dict
+
+# FixFuture
+from __future__ import absolute_import
+
+# FixHasKey
+d.has_key('foobar')
+
+# FixImport
+from py3kwarn import tests
+
+# FixImports
+import StringIO
+import cStringIO
+import cPickle
+import __builtin__
+
+# FixInput
+input('FixInput')
+
+# FixIntern
+intern(s)
+
+# FixIsinstance
+isinstance(x, (int, long))
+isinstance(x, (int, int))
+
+# FixItertoolsImports
+from itertools import imap
+from itertools import ifilter
+from itertools import izip
+from itertools import ifilterfalse
+
+# FixUnicode
+u'Hello World'
+
+# FixLong
+long
+
+# More...

py3kwarn/run.py

@@ -129,5 +129,8 @@ def warnings_for_files(filenames):
 
 def main():
     import sys
-    for warning in warnings_for_files([sys.argv[1], ]):
-        print(warning[1])
+    if sys.version_info >= (3, 0):
+        print("py3kwarn requires Python 2.6 or 2.7")
+    else:
+        for warning in warnings_for_files([sys.argv[1], ]):
+            print(warning[1])