Hi Kou,
I use this in
http://cern.ch/test-volunteers...
to redirect error messages... \etc
hope it helps
#!/usr/bin/python
import os
import cgi
import safeeval
import sys
import string
import time
import re
import urllib
class PitonEsFacilExc eption(Exceptio n):
"Base class for all Exception of the python es facil code"
pass
class LanguageDoesNot ExistException( PitonEsFacilExc eption):
"Exception raised in case the received 'lang' parameter is non of
'en' or 'es'"
def __init__(self, lang):
self.lang=lang
class WritableObject:
def __init__(self):
self.content = ""
def write(self, string):
#self.content.a ppend(string)
self.content = self.content + string
def display_error(s tr):
print "%s" % str
sys.exit(0)
def display_syntax_ error(e,plang):
if (plang=="es_pi" ):
eerr = e.text.replace( "\n","")
langdict = init_dictionary ("en->es")
for key in langdict:
eerr = eerr.replace(ke y, langdict[key])
print("ERROR SINTACTICO")
print("Revise la linea %s" % e.lineno)
print(" %s " % eerr)
elif (plang=="en_pi" ):
eerr = e.text.replace( "\n","")
langdict = init_dictionary ("en->es en_pi")
for key in langdict:
eerr = eerr.replace(ke y, langdict[key])
print("SYNTAX ERROR")
print("Chec kline %s" % e.lineno)
print(" %s " % eerr)
elif (plang=="en_py" ):
print("SYNTAX ERROR")
print("Check line %s" % e.lineno)
print(" %s " % e.text.replace( "\n",""))
else:
raise LanguageDoesNot ExistException( lang)
print(string.rj ust("^",e.offse t+3))
return e.text
def display_name_er ror(e,plang):
saveout = sys.stdout
foo = WritableObject( ) # a writable object
sys.stdout = foo
print e
sys.stdout = saveout
eerr = foo.content
if (plang=="es_pi" ):
langdict = init_dictionary ("en->es")
for key in langdict:
eerr = eerr.replace(ke y, langdict[key])
print "ERROR DE NOMRE: "+ eerr
elif (plang=="en_pi" ):
langdict = init_dictionary ("en->es en_pi")
for key in langdict:
eerr = eerr.replace(ke y, langdict[key])
print "NAME ERROR: "+ eerr
elif (plang=="en_py" ):
print "NAME ERROR: " + eerr
else:
raise LanguageDoesNot ExistException( lang)
return foo.content
def add_trial(form, outcome):
email = form["email"].value
code = form["code"].value
now = time.time()
logrecord = email + ","
logrecord += str(now) + ","
logrecord += time.strftime(" %Y/%m/%d %H:%M:%S %Z",
time.localtime( now)) + ","
logrecord += str(outcome) + "\n"
#logrecord += str(output_wind ow) + ","
#logrecord += str(code_window ) + "\n"
f=open("log/trials.log", "a")
f.write(logreco rd)
f.close()
def main():
print "Content-type: text/html\n\n"
form = cgi.FieldStorag e()
# print form.keys()
code = form["code"].value
lang = form["lang"].value
plang = form["plang"].value
outcome="nodef"
output="nodef"
if (plang=="es_pi" or plang =="en_pi"):
langdict = init_dictionary ("es->en")
for key in langdict:
code = code.replace(ke y, langdict[key])
if code.count("\r\ n") 0:
code = code.replace("\ r\n","\n")
try:
safeeval.safe_e val(code)
saveout = sys.stdout
# example with redirection of sys.stdout
foo = WritableObject( ) # a writable object
sys.stdout = foo
safeeval.safe_e val(code)
output = foo.content
sys.stdout = saveout
except SyntaxError,e:
output = display_syntax_ error(e,plang)
outcome = "XS"
except NameError,e:
output = display_name_er ror(e,plang)
outcome = "XN"
outcome = outcome + "," + urllib.quote(ou tput) + "," +
urllib.quote(co de)
add_trial(form, outcome)
def init_dictionary (lang):
if lang == "es->en":
mydict = {'imprime ':'print ','para_cada ':'for ','si ':'if
','en ': 'in ','sino:': 'else:','longit ud(':'len('}
return mydict
elif lang == "en->es":
mydict = {'is not defined':'no esta
definido','name ':'nombre','pri nt ':'imprime ','for ':'para_cada ','if
':'si ','in ': 'en ','else:': 'sino:','len': 'longitud('}
return mydict
elif lang == "en->es en_pi":
mydict = {'print ':'imprime ','for ':'para_cada ','if ':'si
','in ': 'en ','else:': 'sino:','len': 'longitud('}
return mydict
raise LanguageDoesNot ExistException( lang)
if __name__ == "__main__":
sys.stderr = sys.stdout
try:
main()
except KeyError,e:
display_error(" Parameter not found in the HTTP request")
except LanguageDoesNot ExistException, e:
display_error(" \"lang\" parameter with value '%s' is not
allowed" % e.lang)
except safeeval.SafeEv alException:
display_error(" SafeEvalError, This is a place holder for not
allowed usage of methods")
except SyntaxError,e:
display_error(e )
except Exception,e:
display_error(e )
On Nov 19, 8:09 pm, Bruno Desthuilliers
<bdesth.quelque ch...@free.quel quepart.frwrote :
Jens a écrit :
On 19 Nov., 19:48, kou...@hotmail. com wrote:
>Is it possible to display messages in the python shell? I want to
>display error messages based on parameters in my scripts to the
users. Is there another way to display messages other than log
files? Thanks.
>Kou
What about using print? For example:
print "This is a message."
print writes to stdout - which is for normal program outputs. wrt/
errors, you want stderr, ie:
import sys
print >sys.sdterr, "this is an error message"
HTH
