[Tutor] how to read from a txt file

[Liam Clarke]

Well, a string "12345" when called through int() will come back as 12345.

But, a string "foo", called through int(), will raise a TypeError.

So....

> 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:
>         data_points.append(int(line))
>     return data_points
> 
> print process(data)

You could do this 

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)


That's one way, but there's probably a better way.


Regards, 


Liam Clarke
-- 
'There is only one basic human right, and that is to do as you damn well please.
And with it comes the only basic human duty, to take the consequences.