sir, what seemed to be the problem with this:
def process(list_of_lines): data_points = [] for line in list_of_lines: data_points.append(int(line)) return data_points
data_file = open('C:/Documents and Settings/nyer/Desktop/nyer.txt', 'r') data = data_file.readline()
print process(data)
here is what is written in the nyer.txt: 1000 890 900 500 650 850 1200 1100
what i want is to print data_points: and this is the error:
Traceback (most recent call last):
File "C:\Python23\practices\opentxt", line 12, in -toplevel-
process(data)
File "C:\Python23\practices\opentxt", line 6, in process
data_points.append(int(line))
ValueError: invalid literal for int():
Hi,
I think the traceback is my fault from an oversight in the code I sent you when you posted before. Sorry about that :-[
There are two problems with your code.
The immediate one, due to my advice, is that each line of your file ends with a newline character ('\n'). So, you cannot call int on '1000\n'.
Try
data_points.append(int(line[:-1]))
instead. That will call int on line minus the last character (the newline).
The other problem is that you use data = data_file.readline(). That will give you a single line each time you call it. If you stick with this approach, I think you want data = data_file.readlines() (note the 's' at the end.)
But, you might do well to consider some of the other suggestions you got. They came from more capable programmers than me!
Best,
Brian vdB
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