Re: [Tutor] how to read from a txt file

[Kent Johnson]

jrlen balane wrote:
import sys
data_file = open('C:/Documents and Settings/nyer/Desktop/nyer.txt', 'r')
data = data_file.readlines()
def process(list_of_lines):
    data_points = []
    for line in list_of_lines:
        try:
            tempLine = int(line)
        except TypeError:
            print "Non numeric character in line", line
            continue #Breaks, and starts with next line
        data_points.append(tempLine)
        return data_points
print process(data)
==============
[1000]
==============
same result :( any other suggestion???
It doesn't look to me like you changed the 'return datapoints' line at all? Indentation is 
significant in Python; by indenting the 'return' past the 'for', you make the return part of the 
loop. The effect of this is to break out of the loop after the first line, which is what you are seeing.

Try this:
import sys
data_file = open('C:/Documents and Settings/nyer/Desktop/nyer.txt', 'r')
data = data_file.readlines()
def process(list_of_lines):
    data_points = []
    for line in list_of_lines:
        try:
              tempLine = int(line)
        except TypeError:
              print "Non numeric character in line", line
              continue #Breaks, and starts with next line
        data_points.append(tempLine)
    return data_points  #### This line was moved left four spaces
                        #### now it is not part of the loop
print process(data)
Kent
On Mon, 14 Mar 2005 19:57:26 -0500, Kent Johnson <[EMAIL PROTECTED]> wrote:
jrlen balane wrote:
this is what i get after running this on IDLE:
import sys
data_file = open('C:/Documents and Settings/nyer/Desktop/nyer.txt', 'r')
data = data_file.readlines()
def process(list_of_lines):
   data_points = []
   for line in list_of_lines:
       try:
             tempLine = int(line)
       except TypeError:
             print "Non numeric character in line", line
             continue #Breaks, and starts with next line
       data_points.append(tempLine)
       return data_points
This line ^^^ is indented four spaces too much - you are returning after 
the first time through the
loop. Indent it the same as the for statement and it will work correctly.
Kent
print process(data)
=================
[1000]
==============
but this is what i have written on the text file:
1000
890
900
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Tutor maillist  -  Tutor@python.org
http://mail.python.org/mailman/listinfo/tutor


_______________________________________________
Tutor maillist  -  Tutor@python.org
http://mail.python.org/mailman/listinfo/tutor