[Tutor] updating a print statement

[Kent Johnson]

How are you running the program?

Bryan Fodness wrote:
>  
> for line in file('test.txt'):
>     the_line = line.split()
>     if the_line:
>         if the_line[0] == 'Index':
>             index = float(the_line[-1])
>             print ("\rIndex = %.3f  ") %index,
> raw_input("\nExit")
> Here is my output,
> 
> Index = 0.000   Index = 0.400   Index = 0.800   Index = 1.000  
> 
> 
> On Dec 10, 2007 4:48 PM, Kent Johnson <kent37 at tds.net 
> <mailto:kent37 at tds.net>> wrote:
> 
>     Bryan Fodness wrote:
>      > Here is the code.
>      >
>      > for line in file('test.txt'):
>      >     the_line = line.split()
>      >     if the_line:
>      >         if the_line[0] == 'Index':
>      >             index = float(the_line[-1])
>      >             print ("\rIndex = %.3f") %index
> 
>     Add a comma at the end of the above line to suppress the newline that
>     print normally outputs.
> 
>     Kent
> 
>      > raw_input("\nExit")
>      >
>      > Here is the output.
>      >
>      > Index = 0.000
>      > Index = 0.400
>      > Index = 0.800
>      > Index = 1.000
>      >
>      > Exit
>      >
>      >
>      > On Dec 10, 2007 4:33 PM, Kent Johnson <kent37 at tds.net
>     <mailto:kent37 at tds.net>
>      > <mailto:kent37 at tds.net <mailto:kent37 at tds.net>>> wrote:
>      >
>      >     Bryan Fodness wrote:
>      >      > I do want to overwrite the same line.
>      >      >
>      >      > I do not see a difference between using the \r and not
>     using it.
>      >
>      >     How are you running the program? Try it from a command line
>     if that is
>      >     not what you are doing. Can you show your new code?
>      >
>      >     Kent
>      >
>      >     PS Please Reply All to stay on the list.
>      >
>      >      >
>      >      > On Dec 10, 2007 2:43 PM, Kent Johnson <kent37 at tds.net
>     <mailto:kent37 at tds.net>
>      >     <mailto:kent37 at tds.net <mailto:kent37 at tds.net>>
>      >      > <mailto:kent37 at tds.net <mailto:kent37 at tds.net>
>     <mailto:kent37 at tds.net <mailto:kent37 at tds.net>>>> wrote:
>      >      >
>      >      >     Bryan Fodness wrote:
>      >      >      > I have a print statement in a for loop so I can
>     watch the
>      >     progress
>      >      >      >
>      >      >      > for line in file(file):
>      >      >      >     the_line = line.split()
>      >      >      >     if the_line:
>      >      >      >         print ("Index = %.2f") %index
>      >      >      >
>      >      >      > Is there a way that only one line will be output
>     and the
>      >     variable is
>      >      >      > updated rather than one line for every index.
>      >      >
>      >      >     I'm not sure I understand what you are asking. index
>     is never
>      >      >     updated in
>      >      >     the loop above.
>      >      >
>      >      >     If you want to overwrite the same line on the console, try
>      >      >       print "\rIndex = %.2f" % index,
>      >      >
>      >      >     note ----^
>      >      >          ---------------------------^
>      >      >
>      >      >     You might need some extra spaces at the end of the
>     print to
>      >     'erase' a
>      >      >     longer previous line.
>      >      >
>      >      >     Kent
>      >      >
>      >      >
>      >      >
>      >      >
>      >      > --
>      >      > "The game of science can accurately be described as a
>     never-ending
>      >      > insult to human intelligence." - João Magueijo
>      >
>      >
>      >
>      >
>      > --
>      > "The game of science can accurately be described as a never-ending
>      > insult to human intelligence." - João Magueijo
> 
> 
> 
> 
> -- 
> "The game of science can accurately be described as a never-ending 
> insult to human intelligence." - João Magueijo