Hi, there is a bug in pexpect. When I did couple changes in Sage, so that it works when the binary is renamed from "sage" to "spd", I got this traceback when running notebook():
$ ./spd ----------------------------------------------------------------------------- | Source Python Distribution, Version 3.4.1.beta4, Release Date: 2009-04-15 | | Type notebook() for the GUI, and license() for information. | ----------------------------------------------------------------------------- In [1]: from sage.server.notebook.notebook_object import notebook In [2]: notebook() The notebook files are stored in: /home/ondrej/.spd//sage_notebook ************************************************** * * * Open your web browser to http://localhost:8000 * * * ************************************************** Traceback (most recent call last): File "/home/ondrej/ext/spd/spd/spd1/local/lib/python2.5/site-packages/twisted/application/app.py", line 614, in run runApp(config) File "/home/ondrej/ext/spd/spd/spd1/local/lib/python2.5/site-packages/twisted/scripts/twistd.py", line 23, in runApp _SomeApplicationRunner(config).run() File "/home/ondrej/ext/spd/spd/spd1/local/lib/python2.5/site-packages/twisted/application/app.py", line 330, in run self.application = self.createOrGetApplication() File "/home/ondrej/ext/spd/spd/spd1/local/lib/python2.5/site-packages/twisted/application/app.py", line 416, in createOrGetApplication application = getApplication(self.config, passphrase) --- <exception caught here> --- File "/home/ondrej/ext/spd/spd/spd1/local/lib/python2.5/site-packages/twisted/application/app.py", line 427, in getApplication application = service.loadApplication(filename, style, passphrase) File "/home/ondrej/ext/spd/spd/spd1/local/lib/python2.5/site-packages/twisted/application/service.py", line 368, in loadApplication application = sob.loadValueFromFile(filename, 'application', passphrase) File "/home/ondrej/ext/spd/spd/spd1/local/lib/python2.5/site-packages/twisted/persisted/sob.py", line 214, in loadValueFromFile exec fileObj in d, d File "sage_notebook/twistedconf.tac", line 19, in <module> File "/home/ondrej/ext/spd/spd/spd1/local/lib/python2.5/site-packages/sage/server/notebook/worksheet.py", line 156, in init_sage_prestart _a_sage = initialized_sage(server, ulimit) File "/home/ondrej/ext/spd/spd/spd1/local/lib/python2.5/site-packages/sage/server/notebook/worksheet.py", line 118, in initialized_sage S._start(block_during_init=False) File "/home/ondrej/ext/spd/spd/spd1/local/lib/python2.5/site-packages/sage/interfaces/expect.py", line 450, in _start self._expect = pexpect.spawn(cmd, logfile=self.__logfile) File "/home/ondrej/ext/spd/spd/spd1/local/lib/python2.5/site-packages/pexpect.py", line 326, in __init__ command_with_path = which(self.command) File "/home/ondrej/ext/spd/spd/spd1/local/lib/python2.5/site-packages/pexpect.py", line 1133, in which if os.access (filename, os.X_OK) and not os.path.isdir(f): exceptions.UnboundLocalError: local variable 'f' referenced before assignment Failed to load application: local variable 'f' referenced before assignment --------------------------------------------------------------------------- error Traceback (most recent call last) /home/ondrej/.spd/<ipython console> in <module>() /home/ondrej/ext/spd/spd/spd1/local/lib/python2.5/site-packages/sage/server/notebook/notebook_object.pyc in __call__(self, *args, **kwds) 163 """ 164 def __call__(self, *args, **kwds): --> 165 return self.notebook(*args, **kwds) 166 167 notebook = run_notebook.notebook_twisted /home/ondrej/ext/spd/spd/spd1/local/lib/python2.5/site-packages/sage/server/notebook/run_notebook.pyc in notebook_twisted(self, directory, port, address, port_tries, secure, reset, accounts, require_login, server_pool, ulimit, timeout, open_viewer, sagetex_path, start_path, fork, quiet) 274 if open_viewer: 275 "Open viewer automatically isn't fully implemented. You have to manually open your web browser to the above URL." --> 276 return run(port) 277 278 /home/ondrej/ext/spd/spd/spd1/local/lib/python2.5/site-packages/sage/server/notebook/run_notebook.pyc in run(port) 258 e = os.system(cmd) 259 if e == 256: --> 260 raise socket.error 261 return True 262 # end of inner function run error: In [3]: The bug is in this code in local/lib/python2.5/site-packages/pexpect.py: def which (filename): """This takes a given filename; tries to find it in the environment path; then checks if it is executable. This returns the full path to the filename if found and executable. Otherwise this returns None. """ # Special case where filename already contains a path. if os.path.dirname(filename) != '': if os.access (filename, os.X_OK) and not os.path.isdir(filename): return filename The fix is trivial, just change - if os.access (filename, os.X_OK) and not os.path.isdir(f): + if os.access (filename, os.X_OK) and not os.path.isdir(filename): and all starts working. I don't understand why and how I triggered it (e.g. how can this work in Sage?), but in any case, this is clearly a bug in pexpect. Ondrej --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to sage-devel-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
