stange - linecache.getline puzzle

Scripting Issues
1

I don’t get it. What am I doing wrong?

self.firstRun = 0

# Check if log file exist
try:
    self.checkFile = open('rec.txt')
# if it doesn't write it
except IOError:
    self.checkFile = open('rec.txt', 'w')
    self.checkFile.write('File INI\n\nFirst 
Run = TRUE\nTime = '+str(self.getTime)+'\n')
    self.checkFile.close()
# otherwise just read it and print it
else:
    self.checkFile = open('rec.txt', 'r')
    for line in fileinput.input(['rec.txt']):
        print (line)
    self.checkFile.close()

# For appending purposes
try:
    self.recordFile = open('rec.txt')
except IOError:
    print "File rec.txt not found"
else:
    self.recordFile = open('rec.txt', 'r')
    self.readLine = 
linecache.getline('rec.txt', 3)
    if self.readLine == "First Run = TRUE":
        self.firstRun = 1
        print "##"+str(self.readLine)
    for line in fileinput.input(['rec.txt']):
        print (line)
    self.recordFile.close()

The print for self.readLine is ##First Run = TRUE, but strangely (at least for me) print (line) has some extra lines:

File INI

First Run = TRUE

Time = 10.8168613321

Still I don’t understand why self.readLine is not equal to “First Run = TRUE”. I know it doesn’t because when I use this code;

if self.firstRun == 1:
    self.hVoice001 = 
loader.loadSfx("Sound/silent.mp3")
else:
    self.hIV = Sequence(Wait(20), 
                            
Parallel(self.hVoiceID_001, 
                                    

Func(self.narLetter_0.__setitem__, "text", 

"Welcome,"), 
                                    

Func(self.narLetter_0.__setitem__, "text_fg", 

(1,1,0,1))), Wait(8))
    self.hIV.start()

self.hIV plays
However, when I use this:

if self.firstRun == 0:
    self.hVoice001 = 

loader.loadSfx("Sound/silent.mp3")
else:
    self.hIV = Sequence(Wait(20), 
                            

Parallel(self.hVoiceID_001, 
                                    

Func(self.narLetter_0.__setitem__, "text", 

"Welcome,"), 
                                    

Func(self.narLetter_0.__setitem__, "text_fg", 

(1,1,0,1))), Wait(8))
    self.hIV.start()

The sequence doesn’t play.
I don’t see why it’s not working as I think it should.

2

Getline’s return value also includes end of line delimiter. If you don’t need it, strip it off with .rstrip("\n")
For cross platform consistency, I’d recommend using “rU” mode for reading.

3

Arrrggggggg

I’m not getting it.
I tried:

"First Run = TRUE\n".rstrip("\n")
"First Run = TRUE".rstrip("\n")
str(self.readLine)+"\n".rstrip("\n")
str(self.readLine).rstrip("\n")

Still the results are the same as before.
I don’t know what else to do.
I spent practically two nights searching the net for info on getting this to work, and nothing I try works. I hadn’t come across .rstrip before, but not ynjh_jo has drawn it to my attention, I still am not getting it to work. I don’t know what I am doing wrong.
As regards ‘rU’ mode which I have never seen in all my searches, I haven’t been able to check it out because my internet connection is so slow that sometime pages don’t even load, and I have to close it and return later. This is quite frustrating.

If I can get .rstrip work, and it can work with a variable like this:

str(self.readLine)+"\n".rstrip("\n")

then I think that would solve a major problem for me and allow me to move on. But right now I’m stuck - stuck in a rut. HELP

Thanks ynjh_jo for your contribution. i’d appreciate any more help you can give.

4

What you should strip is the result of getline, then save it to readLine :

self.readLine = linecache.getline(***).rstrip("\n")

Why do you have to spend your time browsing the net just to learn python ?
If you’re on Windows, there is already a .chm in your python installation.

5

Yeeeeeeaaaah! That’s it!
A million thanks to you ynjh_jo.
I would never ever ever had known that was the way to do it.
Thank you! Thank you! Thank you!

And thank you for the pointer to the python .chm. I did not know that.
Now I can move on. Thanks