annotate __init__.py @ 301:57c45df381f1

added source-version function, close ticket #44
author James Bergstra <bergstrj@iro.umontreal.ca>
date Tue, 10 Jun 2008 11:01:00 -0400
parents 2be51c13b55f
children 675d92789941
rev   line source
35
2508c373cf29 bug fix for reading byte matrices
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1 import filetensor
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2 import nnet_ops
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3
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4 from lookup_list import LookupList
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5
301
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6
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7
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8 import subprocess as _subprocess
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9 import imp as _imp
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10 def __src_version__():
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11 """Return compact identifier of module code.
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12
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13 @return: compact identifier of module code.
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14 @rtype: string
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15
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16 @note: This function tries to establish that the source files and the repo
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17 are syncronized. It raises an Exception if there are un-tracked '.py'
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18 files, or if there are un-committed modifications. This implementation uses
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19 "hg id" to establish this. The code returned by "hg id" is not affected by
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20 hg pull, but pulling might remove the " tip" string which might have
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21 appeared. This implementation ignores the " tip" information, and only
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22 uses the code.
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23
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24 @note: This implementation is assumes that the import directory is under
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25 version control by mercurial.
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26
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27 """
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28 #print 'name:', __name__
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29 location = _imp.find_module(__name__)[1]
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30 #print 'location:', location
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31
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32 status = _subprocess.Popen(('hg','st'),cwd=location,stdout=_subprocess.PIPE).communicate()[0]
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33 #status_codes = [line[0] for line in if line and line[0] != '?']
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34 for line in status.split('\n'):
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35 if not line: continue
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36 if line[0] != '?':
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37 raise Exception('Uncommitted modification to "%s" in %s (%s)'
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38 %(line[2:], __name__,location))
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39 if line[0] == '?' and line[-3:] == '.py':
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40 raise Exception('Untracked file "%s" in %s (%s)'
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41 %(line[2:], __name__, location))
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42
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43 hg_id = _subprocess.Popen(('hg','id'),cwd=location,stdout=_subprocess.PIPE).communicate()[0]
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44
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45 #This asserts my understanding of hg id return values
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46 # There is mention in the doc that it might return two parent hash codes
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47 # but I've never seen it, and I dont' know what it means or how it is
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48 # formatted.
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49 tokens = hg_id.split(' ')
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50 assert len(tokens) <= 2
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51 assert len(tokens) >= 1
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52 assert tokens[0][-1] != '+' # the trailing + indicates uncommitted changes
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53 if len(tokens) == 2:
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54 assert tokens[1] == 'tip'
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55
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56 return tokens[0]
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57