Error in file opening Vizard
 

Dear all,

I am getting this error in my code when i am opening file in append mode:

Traceback (most recent call last):
File "C:\Program Files\WorldViz\Vizard5\python\viztask.py", line 752, in updateAndKillOnException
return self.update()
File "C:\Program Files\WorldViz\Vizard5\python\viztask.py", line 719, in update
val = self._stack[-1].send(sendData)
File "DFI_Snacks.py", line 50, in task1
IOError: [Errno 22] invalid mode ('a') or filename: '_experiment_data.txt'

My Source Code:


global experiment_data
os.chdir(r'D:\PhD\Study-I_Part_I\My_Programs\DFI\Participant_Data')
filename=str(id) +'_experiment_data.txt'
experiment_data = open(filename,'a')
print str(id)
I am getting exporting id value from other code

Please help me in it.
Thanks

It looks like the file is not found. Does the following work?

Same error is coming with code suggested by you.

I will explain it
I have one file called Parent in which i created file experiment_data having write mode using code.

os.chdir(r'D:\PhD\Study-I_Part_I\My_Programs\DFI\Participant_Data')
experiment_data = open(str(id) + '_experiment_data.txt','w')
data = " Participant ID: %s\tParticipant Name: %s\tAge: %s\tGender: %s\n\n" % (id,Name,Age,gender)
experiment_data.write(data)

After that i made a child code to which i passed id variable value to child using code
id=id
myVars = {'id':id}
exec(open('DFI_Snacks.py').read(), myVars)

Then I open experiment_data file in child code matching with id value in append mode using code

os.chdir(r'D:\PhD\Study-I_Part_I\My_Programs\DFI\Participant_Data')
filename=str(id) +'_experiment_data.txt'
experiment_data = open(filename,'a')

This error is coming when Parent code import child code. I don't know where i am going wrong.

File Handling
 

If i open file every time i need to write data then this error not comes but then new problem came that is infobox.remove() is not working. Adding snapshot for reference.
Source Code:
if radio1.get() == viz.DOWN:
infoBox.remove()
score=0

os.chdir(r'D:\PhD\Study-Attachment 964I_Part_I\My_Programs\DFI\Participant_Data')

experiment_data = open(str(id) + '_experiment_data.txt','a')

feedback = viz.addText('You are doing Great!',viz.SCREEN)

I figured it out... Thanks