Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/planemo/conda_verify/utils.py @ 2:6af9afd405e9 draft

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
"planemo upload commit 0a63dd5f4d38a1f6944587f52a8cd79874177fc1"
author shellac
date Thu, 14 May 2020 14:56:58 -0400
parents 26e78fe6e8c4
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 import collections
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2 import sys
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3
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4 from planemo.conda_verify.const import (
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5 DLL_TYPES,
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6 MAGIC_HEADERS,
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7 )
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8
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9
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10 def get_object_type(data):
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11 head = data[:4]
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12 if head not in MAGIC_HEADERS:
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13 return None
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14 lookup = MAGIC_HEADERS.get(head)
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15 if lookup == 'DLL':
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16 pos = data.find('PE\0\0')
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17 if pos < 0:
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18 return "<no PE header found>"
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19 i = ord(data[pos + 4]) + 256 * ord(data[pos + 5])
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20 return "DLL " + DLL_TYPES.get(i)
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21 elif lookup.startswith('MachO'):
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22 return lookup
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23 elif lookup == 'ELF':
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24 return "ELF" + {'\x01': '32', '\x02': '64'}.get(data[4])
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25
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26
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27 def get_bad_seq(s):
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28 for seq in ('--', '-.', '-_',
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29 '.-', '..', '._',
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30 '_-', '_.'): # but '__' is fine
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31 if seq in s:
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32 return seq
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33 return None
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34
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35
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36 def all_ascii(data, allow_CR=False):
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37 newline = [10] # LF
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38 if allow_CR:
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39 newline.append(13) # CF
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40 for c in data:
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41 n = ord(c) if sys.version_info[0] == 2 else c
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42 if not (n in newline or 32 <= n < 127):
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43 return False
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44 return True
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45
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46
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47 class memoized(object):
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48 """Decorator. Caches a function's return value each time it is called.
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49 If called later with the same arguments, the cached value is returned
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50 (not reevaluated).
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51 """
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52 def __init__(self, func):
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53 self.func = func
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54 self.cache = {}
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55
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56 def __call__(self, *args):
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57 if not isinstance(args, collections.Hashable):
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58 # uncacheable. a list, for instance.
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59 # better to not cache than blow up.
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60 return self.func(*args)
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61 if args in self.cache:
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62 return self.cache[args]
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63 else:
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64 value = self.func(*args)
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65 self.cache[args] = value
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66 return value
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67
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68
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69 if __name__ == '__main__':
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70 print(sys.version)
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71 print(all_ascii(b'Hello\x00'), all_ascii(b"Hello World!"))