/usr/lib/python2.7/dist-packages/mdp/utils/introspection.py is in python-mdp 3.5-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 | from future import standard_library
standard_library.install_aliases()
from builtins import map
from builtins import str
from builtins import object
import types
import pickle
import mdp
class _Walk(object):
"""Recursively crawl an object and search for attributes that
are reference to numpy arrays, return a dictionary:
{attribute_name: array_reference}.
Usage:
_Walk()(object)
"""
def __init__(self):
self.arrays = {}
self.start = None
self.allobjs = {}
def __call__(self, x, start = None):
arrays = self.arrays
# loop through the object dictionary
for name in dir(x):
# get the corresponding member
obj = getattr(x, name)
if id(obj) in list(self.allobjs.keys()):
# if we already examined the member, skip to the next
continue
else:
# add the id of this object to the list of know members
self.allobjs[id(obj)] = None
if start is None:
# initialize a string structure to keep track of array names
struct = name
else:
# struct is x.y.z (where x and y are objects and z an array)
struct = '.'.join((start, name))
if isinstance(obj, mdp.numx.ndarray):
# the present member is an array
# add it to the dictionary of all arrays
if start is not None:
arrays[struct] = obj
else:
arrays[name] = obj
elif name.startswith('__') or type(obj) in (int, int, float,
types.MethodType):
# the present member is a private member or a known
# type that does not support arrays as attributes
# Note: this is to avoid infinite
# recursion in python2.6. Just remove the "or type in ..."
# condition to see the error. There must be a better way.
continue
else:
# we need to examine the present member in more detail
arrays.update(self(obj, start = struct))
self.start = start
return arrays
def _format_dig(dict_):
longest_name = max(list(map(len, list(dict_.keys()))))
longest_size = max([len('%d'%x[0]) for x in list(dict_.values())])
msgs = []
total_size = 0
for name in sorted(dict_.keys()):
size = dict_[name][0]
total_size += size
pname = (name+':').ljust(longest_name+1)
psize = ('%d bytes' % size).rjust(longest_size+6)
msg = "%s %s" % (pname, psize)
msgs.append(msg)
final = "Total %d arrays (%d bytes)" % (len(dict_), total_size)
msgs.append(final)
return '\n'.join(msgs)
def dig_node(x):
"""Crawl recursively an MDP Node looking for arrays.
Return (dictionary, string), where the dictionary is:
{ attribute_name: (size_in_bytes, array_reference)}
and string is a nice string representation of it.
"""
if not isinstance(x, mdp.Node):
raise Exception('Cannot dig %s' % (str(type(x))))
arrays = _Walk()(x)
for name in list(arrays.keys()):
ar = arrays[name]
if len(ar.shape) == 0:
size = 1
else:
size = mdp.numx.prod(ar.shape)
bytes = ar.itemsize*size
arrays[name] = (bytes, ar)
return arrays, _format_dig(arrays)
def get_node_size(x):
"""Return node total byte-size using cPickle with protocol=2.
The byte-size is related to the memory needed by the node).
"""
# TODO: add check for problematic node types, like NoiseNode?
# TODO: replace this with sys.getsizeof for Python >= 2.6
size = len(pickle.dumps(x, protocol = 2))
return size
def get_node_size_str(x, si_units=False):
"""Return node total byte-size as a well readable string.
si_units -- If True si-units like KB are used instead of KiB.
The get_node_size function is used to get the size.
"""
return _memory_size_str(get_node_size(x), si_units=si_units)
_SI_MEMORY_PREFIXES = ("", "k", "M", "G", "T", "P", "E")
_IEC_MEMORY_PREFIXES = ("", "Ki", "Mi", "Gi", "Ti", "Pi", "Ei")
def _memory_size_str(size, si_units=False):
"""Convert the given memory size into a nicely formatted string.
si_units -- If True si-units like kB are used instead of kiB.
"""
if si_units:
base = 10**3
else:
base = 2**10
scale = 0 # 1024**scale is the actual scale
while size > base**(scale+1):
scale += 1
unit = "B"
if scale:
size_str = size = "%.1f" % (1.0 * size / (base**scale))
if si_units:
unit = _SI_MEMORY_PREFIXES[scale] + unit
else:
unit = _IEC_MEMORY_PREFIXES[scale] + unit
else:
size_str = "%d" % size
return size_str + " " + unit
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