<div>I<span style="background-color:rgb(255,255,255);font-family:Arial,'Liberation Sans','DejaVu Sans',sans-serif;font-size:14px;line-height:18px;text-align:left">'m developing a system in python, and one functionality I need is the ability to have console output go to both the console and a user-specified file. This is replicating the Diary function in MATLAB. I have the following that works perfectly well on both IDLE on windows and python cmdline in ubuntu (this all exists inside a module that gets loaded):</span></div>
<pre style="margin-top:0px;margin-bottom:10px;padding:5px;border:0px;font-size:14px;vertical-align:baseline;background-color:rgb(238,238,238);font-family:Consolas,Menlo,Monaco,'Lucida Console','Liberation Mono','DejaVu Sans Mono','Bitstream Vera Sans Mono','Courier New',monospace,serif;overflow:auto;width:auto;max-height:600px;line-height:18px;text-align:left">
<code style="margin:0px;padding:0px;border:0px;vertical-align:baseline;font-family:Consolas,Menlo,Monaco,'Lucida Console','Liberation Mono','DejaVu Sans Mono','Bitstream Vera Sans Mono','Courier New',monospace,serif">class diaryout(object):
def __init__(self):
self.terminal = sys.stdout
self.save = None
def __del__(self):
try:
self.save.flush()
self.save.close()
except:
# do nothing, just catch the error; maybe it self was instantiated, but never opened
1/1
self.save = None
def dclose(self):
self.__del__()
def write(self, message):
self.terminal.write(message)
self.save.write(message)
def dopen(self,outfile):
self.outfile = outfile
try:
self.save = open(self.outfile, "a")
except Exception, e:
# just pass out the error here so the Diary function can handle it
raise e
def Diary(outfile = None):# NEW TO TEST
global this_diary
if outfile == None:
# None passed, so close the diary file if one is open
if isinstance(this_diary, diaryout):
sys.stdout = this_diary.terminal # set the stdout back to stdout
this_diary.dclose() # flush and close the file
this_diary = None # "delete" it
else:
# file passed, so let's open it and set it for the output
this_diary = diaryout() # instantiate
try:
this_diary.dopen(outfile) # open & test that it opened
except IOError:
raise IOError("Can't open %s for append!"%outfile)
this_dairy=none # must uninstantiate it, since already did that
except TypeError:
raise TypeError("Invalid input detected - must be string filename or None: %s"%Diary.__doc__)
this_dairy=none # must uninbstantiate it, since already did that
sys.stdout = this_diary # set stdout to it
</code></pre><p style="margin:0px 0px 1em;padding:0px;border:0px;font-size:14px;vertical-align:baseline;background-color:rgb(255,255,255);clear:both;word-wrap:break-word;font-family:Arial,'Liberation Sans','DejaVu Sans',sans-serif;line-height:18px;text-align:left">
Far superior to both IDLE and the plain python cmline, I'm using ipython; herein my problem lies. I can turn on the "diary" perfectly fine with no error <em style="margin:0px;padding:0px;border:0px;vertical-align:baseline;background-color:transparent">but</em> the display on the console gets messed. The attached screenshot shows this <img src="http://i.stack.imgur.com/uQl88.jpg" alt="screenshot" style="margin: 0px; padding: 0px; border: 0px; vertical-align: baseline; background-color: transparent; max-width: 640px; ">. The output file also becomes similarly garbled. Everything goes back to normal when I undo the redirection with <code style="margin:0px;padding:1px 5px;border:0px;vertical-align:baseline;background-color:rgb(238,238,238);font-family:Consolas,Menlo,Monaco,'Lucida Console','Liberation Mono','DejaVu Sans Mono','Bitstream Vera Sans Mono','Courier New',monospace,serif">Diary(None)</code>. I have tried editing the code so that it never even writes to the file, with no effect. It seems almost like something is forcing an unsupported character set or something I don't understand.</p>
<p style="margin:0px 0px 1em;padding:0px;border:0px;font-size:14px;vertical-align:baseline;background-color:rgb(255,255,255);clear:both;word-wrap:break-word;font-family:Arial,'Liberation Sans','DejaVu Sans',sans-serif;line-height:18px;text-align:left">
Anyone have an idea about this?</p><br clear="all"><~~~~~~~~~~~~~~~~~~~~~~~~~~~><br>J. Andrew Howe, PhD<div>Editor-in-Chief, European Journal of Mathematical Sciences<br>Associate Editor, European Journal of Pure and Applied Mathematics<br>
<a href="http://www.andrewhowe.com" target="_blank">www.andrewhowe.com</a><br>I live to learn, so I can learn to live. - me<br><~~~~~~~~~~~~~~~~~~~~~~~~~~~></div><br>