dexapier / imagescanner Goto Github PK

From Python 2.7 importlib is shipped with official distributions

Test backend is not working.

Implement support for standard status for the devices. IE: Ready, Scanning, Not 
Responding, Waiting, Shutting, etc.

simplejson is easier to be installed than cjson and we are not serializing data 
enough to see any performance gain with cjson.

Executing "pip install imagescanner" on a python 2.7 install (windows 32) fails 
with an exception stating that importlib is included in 2.7.

HI,

Your application is great, along with pdfgen.py 
(http://keyj.emphy.de/files/pdfgen.py) I was able to convert to pdf.

Can I use the scanner from the client?
Thanks.

When PIL is installed by setup.py or easy_install an egg file is generated.

The current implementation of pysane can't import PIL if it's zipped.

If PIL is installed using pip it works fine. It also works when installed from 
the official Ubuntu package.

Traceback:
>>> import sane
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/sergio/.virtualenvs/imagescanner/lib/python2.6/site-packages/pysane-2.0-py2.6-linux-x86_64.egg/sane.py", line 11, in <module>
ImportError: No module named PIL

I have installed python 2.7.4_pre20120805 and `platform.python_version()` 
returns '2.7.3+'. As a result the expression
`platform.python_version() < version.StrictVersion("2.7")` in setup.py raises 
`ValueError`:

python2.7 setup.py build
Traceback (most recent call last):
  File "setup.py", line 25, in <module>
    if platform.python_version() < version.StrictVersion("2.7"):
  File "/usr/lib/python2.7/distutils/version.py", line 138, in __cmp__
    other = StrictVersion(other)
  File "/usr/lib/python2.7/distutils/version.py", line 40, in __init__
    self.parse(vstring)
  File "/usr/lib/python2.7/distutils/version.py", line 107, in parse
    raise ValueError, "invalid version number '%s'" % vstring
ValueError: invalid version number '2.7.3+'

I unsure, maybe this condition can be
`version.LooseVersion(platform.python_version()) < version.LooseVersion("2.7")`?

Check what is missing to have it working on OS X and implement it.

Read the configuration from /etc on Linux.
Any idea where it should be in Windows?

What steps will reproduce the problem?
1. Retrieve Scanner object 
2. Attempt to call scan() method with dpi not set to 200

What is the expected output? What do you see instead?
Expected: scanning the document with desired DPI.
Actual: scanning the document with DPI 200.

What version of the product are you using? On what operating system?
imagescanner 0.9 for python 2.7 on win 7, installed via pip.


Suggested fix:
imagescanner/ backends/ twain/ __init__.py
@lines 53-54
    def _open(self):
        self._src_manager = twain.SourceManager(0)
        self._scanner = self._src_manager.OpenSource(self._source_name)
-       self._scanner.SetCapability(twain.ICAP_YRESOLUTION,
-                                   twain.TWTY_FIX32, 200.0)

@lines 60-61
    def scan(self, dpi=200):
        self._open()
+       self._scanner.SetCapability(twain.ICAP_YRESOLUTION, 
+                                   twain.TWTY_FIX32, dpi)
        self._scanner.RequestAcquire(0, 0)

Create a method Scanner.scan_async

I have was not satisfied with twain behavior (in complains about installed but 
not connected scanners), so I implemented WIA backend ;-) It is my clone: 
http://code.google.com/r/zdenop-imagescanner/ so you can merge it to main code 
if you like it.

Twain is still available (so complaining about not present scanner is still 
there :-))

Create a test infrastructure for the project

Move scanner_serializer from __init__.py to a file on utils/