[Tutor] Write string into files
Ms Soo Chong
s4046441 at student.uq.edu.au
Wed Oct 6 09:16:47 CEST 2004
Hi,
I'm trying to combine a bunch of data from a form
into a string and write it into a file. It works
fine if the user input each and every fields but it
showed the following error if the user did not. And
these fields are not compulsory, they may or may not
have values. So how should I do it? Btw, the way I'm
doing it now is kinda of longwinded so if anyone can
suggest me a better deal of grabbing all the data
into a file straight, it would be very nice.
Any help is greatly appreciated.
Thank you.
Shufen
#####################################################
A problem occurred in a Python script. Here is the
sequence of function calls leading up to the error,
in the order they occurred.
/var/www/cgi-bin/sf/run_des.py
192 str += "<blame>" + blame + "</blame>"
+ "\n"
193 str += "<date_string>" + date_string +
"</date_string>" + "\n"
194 str += "<nozzle>" + nozzle +
"</nozzle>" + "\n"
195 str += "<shocktube>" + shocktube +
"</shocktube>" + "\n"
196 str += "<reservoir>" + reservoir +
"</reservoir>" + "\n"
str = '<facility_name>T4 Shock
Tunnel</facility_name>\n<...F/PJ</blame>\n<date_string>05/10/04</date_string>\n',
nozzle = None
TypeError: cannot concatenate 'str' and 'NoneType'
objects
__doc__ = 'Inappropriate argument type.'
__getitem__ = <bound method
TypeError.__getitem__ of <exceptions.TypeError
instance at 0x81d31dc>>
__init__ = <bound method TypeError.__init__ of
<exceptions.TypeError instance at 0x81d31dc>>
__module__ = 'exceptions'
__str__ = <bound method TypeError.__str__ of
<exceptions.TypeError instance at 0x81d31dc>>
args = ("cannot concatenate 'str' and
'NoneType' objects",)
######################################################
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