#
# This file is part of Hooke.
#
-# Hooke is free software: you can redistribute it and/or
-# modify it under the terms of the GNU Lesser General Public
-# License as published by the Free Software Foundation, either
-# version 3 of the License, or (at your option) any later version.
+# Hooke is free software: you can redistribute it and/or modify it
+# under the terms of the GNU Lesser General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
#
-# Hooke is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU Lesser General Public License for more details.
+# Hooke is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
+# Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with Hooke. If not, see
from .. import curve as curve
from .. import experiment as experiment
+from ..util.util import Closing as Closing
from . import Driver as Driver
-class Closing (object):
- """Add .__enter__() .__exit__() for `with` statements.
-
- See :pep:`343`.
- """
- def __init__(self, obj):
- self.obj = obj
-
- def __enter__(self):
- return self.obj
-
- def __exit__(self, *exc_info):
- try:
- close_it = self.obj.close
- except AttributeError:
- pass
- else:
- close_it()
-
-
class JPKDriver (Driver):
"""Handle JPK ForceRobot's data format.
"""
super(JPKDriver, self).__init__(name='jpk')
def is_me(self, path):
+ if os.path.isdir(path):
+ return False
if zipfile.is_zipfile(path): # JPK file versions since at least 0.5
with Closing(zipfile.ZipFile(path, 'r')) as f:
if 'header.properties' not in f.namelist():
headlines = []
for i in range(3):
headlines.append(f.readline())
- if headlines[0].startswith('# xPosition') \
- and headlines[1].startswith('# yPosition'):
- return True
+ if headlines[0].startswith('# xPosition') \
+ and headlines[1].startswith('# yPosition'):
+ return True
return False
def read(self, path, info=None):
for i in range(len([p for p in f.namelist()
if p.endswith('segment-header.properties')])):
segments.append(self._zip_segment(f, path, info, zip_info, i))
- for name in ['approach', 'retract']:
- if len([s for s in segments if s.info['name'] == name]) == 0:
- raise ValueError(
- 'No segment for %s in %s, only %s'
- % (name, path, [s.info['name'] for s in segments]))
- return (segments,
- self._zip_translate_params(zip_info,
- segments[0].info['raw info']))
+ if zip_info['file-format-version'] not in ['0.5']:
+ raise NotImplementedError(
+ 'JPK file version %s not supported (yet).'
+ % zip_info['file-format-version'])
+ for name in ['approach', 'retract']:
+ if len([s for s in segments if s.info['name'] == name]) == 0:
+ raise ValueError(
+ 'No segment for %s in %s, only %s'
+ % (name, path, [s.info['name'] for s in segments]))
+ return (segments,
+ self._zip_translate_params(zip_info,
+ segments[0].info['raw info']))
def _zip_info(self, zipfile):
with Closing(zipfile.open('header.properties')) as f:
'Non-float data format:\n%s' % pprint.pformat(chan_info)
data = numpy.frombuffer(
buffer(f.read()),
- dtype=numpy.dtype(numpy.float32).newbyteorder('>'),
- # Is JPK data always big endian? I can't find a config
- # setting. The ForceRobot brochure
- # http://www.jpk.com/forcerobot300-1.download.6d694150f14773dc76bc0c3a8a6dd0e8.pdf
- # lists a PowerPC chip on page 4, under Control
- # electronics, and PPCs are usually big endian.
- # http://en.wikipedia.org/wiki/PowerPC#Endian_modes
- )
+ dtype=numpy.dtype(numpy.float32).newbyteorder('>'))
+ # '>' (big endian) byte order.
+ # From version 0.3 of JPKForceSpec.txt in the "Binary data" section:
+ # All forms of raw data are stored in chronological order
+ # (the order in which they were collected), and the
+ # individual values are stored in network byte order
+ # (big-endian). The data type used to store the data is
+ # specified by the "channel.*.data.type" property, and is
+ # either short (2 bytes per value), integer (4 bytes), or
+ # float (4 bytes, IEEE format).
f.close()
return data
def _read_old(self, path, info):
raise NotImplementedError('No old-style JPK files were available for testing, please send us yours: %s' % path)
-
-# LocalWords: JPK ForceRobot's
projects / hooke.git / blobdiff