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How to detect if a text file has nothing in it.

 

How to detect if a text file has nothing in it.
xZachtmx

16 Jun, 2009 - 03:03 AM
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Ok here is my code for an alarm setter... once i have my gui it will all be using the interface but right now here it is:

CODE


import sys

#Zach's alarm setting module for the alarm program.
file = open("text.txt","r")
line = file.readline()
if line == (""):#<--------------------- code i need help with
    print("You dont have your alarm set.")
    response = raw_input("Would you like to set it now? [y / n ]")
    if response == ("n"):
        file.close()
        sys.exit()



it dosent seem to detect that there is nothing in the text file... is there something else i need?
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dragon-slayer

RE: How To Detect If A Text File Has Nothing In It.

16 Jun, 2009 - 10:53 AM
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CODE
import sys

#Zach's alarm setting module for the alarm program.
file = open("text.txt","r")
line = file.readline()

if len(line) == 1 or len(line) ==0:#<--------------------- code i need help with
    print("You dont have your alarm set.")
    response = raw_input("Would you like to set it now? [y / n ]")
    if response == ("n"):
        file.close()
        sys.exit()


The reason your code didn't operate as expected is as when you erase the data in a text file there is still white space, So what this know does is check the length if it's 1 then it is empty(1==whitespace) if it is 0 then it is empty but has been newly created I think this should work

This post has been edited by dragon-slayer: 16 Jun, 2009 - 10:57 AM
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