/usr/share/pyshared/Scientific/BSP/Console.py is in python-scientific 2.8-4.
This file is owned by root:root, with mode 0o644.
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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 | # Parallel console for interactive use of Python/BSP
#
# Written by Konrad Hinsen <hinsen@cnrs-orleans.fr>
# last revision: 2006-6-12
#
"""
Interactive console for parallel computing
"""
from Scientific.BSP import ParValue, ParRootFunction, \
processorID, numberOfProcessors
import Scientific.BSP.core
from code import InteractiveInterpreter, InteractiveConsole
from cStringIO import StringIO
import exceptions, sys
#
# Special unique object used in synchronization.
#
class OKToken:
def __init__(self):
pass
ok = OKToken()
def isOK(object):
try:
return object.__class__ is OKToken
except AttributeError:
return 0
#
# Synchronise all processes when there is a possibility than some have crashed.
#
def synchronize():
done = 0
while not done:
put(ok, range(processorID) + range(processorID+1, numberOfProcessors))
status = sync()
if len(status) == numberOfProcessors-1:
done = 1
for object in status:
if not isOK(object):
done = 0
#
# Special exception object. It is raised by the modified sync()
# routine below when it notices that some other process has crashed.
#
class BSPSyncError(exceptions.Exception):
pass
#
# Modified sync() routine used by interactively executed code
# When it captures one of the unique objects (that no other module
# can ever generate), it knows that some other process has crashed
# prematurely and it crashes its own processes as well to prevent
# lockups.
#
def syncCheck():
messages = sync()
for object in messages:
if isOK(object):
raise BSPSyncError
return messages
put = Scientific.BSP.core.put
sync = Scientific.BSP.core.sync
Scientific.BSP.core.sync = syncCheck
#
# Wrappers around stdout and stderr for printing processor numbers
#
class OutputStream:
def __init__(self, stream):
self.stream = stream
def write(self, string):
global _pid_banner
if _pid_banner is not None and string:
self.stream.write(_pid_banner)
self.stream.write(string)
_pid_banner = None
def __getattr__(self, attr):
return getattr(self.stream, attr)
_pid_banner = None
#
# Type function that works "through" ParValue objects
#
def typePar(object):
if hasattr(object, 'is_parvalue'):
return ParValue(type(object.value))
else:
return type(object)
#
# Parallel console run on processor 0
#
class ParallelConsole(InteractiveConsole):
def __init__(self):
namespace = {"__name__": "__console__",
"__doc__": None,
"type": typePar}
InteractiveConsole.__init__(self, namespace)
def push(self, line):
global _pid_banner
self.buffer.append(line)
source = "\n".join(self.buffer)
put(source, range(1, numberOfProcessors))
sync()
_pid_banner = ("-- Processor %d " % processorID) + 40*'-' + '\n'
more = self.runsource(source, self.filename)
_pid_banner = None
synchronize()
output = sync()
output.sort(lambda a, b: cmp(a[0], b[0]))
for pid, stdout, stderr in output:
if stdout or stderr:
print ("-- Processor %d " % pid) + 40*'-'
if stdout:
print stdout,
if stderr:
print stderr,
if not more:
self.resetbuffer()
return more
def mainloop(self):
cprt = 'Type "copyright", "credits" or "license" for more information.'
banner = "Python %s on %s\n%s\n(Parallel console, %d processors)" % \
(sys.version, sys.platform, cprt, numberOfProcessors)
while 1:
try:
self.interact(banner)
break
except KeyboardInterrupt:
print "KeyboardInterrupt"
banner = ""
put(None, range(1, numberOfProcessors))
sync()
#
# Interpreter run on all other processors
#
class ParallelInterpreter(InteractiveInterpreter):
def __init__(self):
locals = {"__name__": "__console__",
"__doc__": None,
"type": typePar}
InteractiveInterpreter.__init__(self, locals)
def mainloop(self):
while 1:
sys.stdout.close()
sys.stdout = StringIO()
sys.stderr.close()
sys.stderr = StringIO()
source = sync()[0]
if source is None:
break
self.runsource(source)
synchronize()
put((processorID, sys.stdout.getvalue(), sys.stderr.getvalue()),
[0])
sync()
#
# Parallel console function
#
def console():
sys.stdout = OutputStream(sys.stdout)
sys.stderr = OutputStream(sys.stderr)
my_console = ParallelConsole()
my_console.raw_input = raw_input
my_console.mainloop()
def interpreter():
sys.stdout = StringIO()
sys.stderr = StringIO()
my_interpreter = ParallelInterpreter()
my_interpreter.mainloop()
parallelConsole = ParRootFunction(console, interpreter)
#
# Run parallel console
#
if __name__ == '__main__':
parallelConsole()
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