Re: [Tutor] need help opening a file in idle
Meital Amitai meital.ami...@gmail.com wrote
I am not sure how to open a file in my computer in idle.
You need to be clear what you are doing. You are not
opening the file in IDLE you are opening the file in Python.
IDLE is just the tool you use to write Ptython programs.
For my python class the homework states to write a function that accepts
the
name of a file and returns a tuple containing the number of lines, words
and
characters in the file. My problem is how do I get idle to first accept
the
name of a file.
You need to get Python to accept the name of the file.
And the biggest problem there is to identify the full path
of the file. To program successfully you will need to understand
where and how your computer stores files. On modern computers casual
users don't really need to know that kind of stuff but programmers do.
I created a file in text edit program saved with a .doc
extension, saved on my desktop. However the only way I have learned to
open
a file in my class is to write something like:
f = open('inputfile','r')
line = f.readline()
but when i type exactly that into my idle i get the following error
message:
Traceback (most recent call last):
File pyshell#12, line 1, in module
f = open('inputfile','r')
IOError: [Errno 2] No such file or directory: 'inputfile'
I'm assuming you realise that inputfile is a symbol that stands for
any file name it doesn't have to be literally inputfile... But the file
must exist before you can read it (the 'r' bit says you want to
read the file)
and when i ask it to open the actual file i created in my text edit
program:
file1.doc
f = open('file1.doc','r')
I get the same message.
You didn't tell Python to look in the Desktop folder
(Although that's not a good place to store files unless
you want a very confusing desktop! You would be better
to store it in MyDocuments)
I am not sure how to tell it to go to desktop folder in my computer where
i
saved that file. Am I missing something, and completely not getting the
point?
It's up to you to know where the file is and tell Python.
You might try this to find out where Python is looking for
the file by default.
import os
print os.getcwd()
Which prints what Python considers the Current Working Directory.
You will find a lot more on this topic, including a program for
counting words in a file in the Handling files topic of my tutorial.
HTH,
--
Alan Gauld
Author of the Learn to Program web site
http://www.alan-g.me.uk/
___
Tutor maillist - Tutor@python.org
http://mail.python.org/mailman/listinfo/tutor
[Tutor] need help opening a file in idle
Hi everyone,
I am not sure how to open a file in my computer in idle.
For my python class the homework states to write a function that accepts the
name of a file and returns a tuple containing the number of lines, words and
characters in the file. My problem is how do I get idle to first accept the
name of a file. I created a file in text edit program saved with a .doc
extension, saved on my desktop. However the only way I have learned to open
a file in my class is to write something like:
f = open('inputfile','r')
line = f.readline()
but when i type exactly that into my idle i get the following error message:
Traceback (most recent call last):
File pyshell#12, line 1, in module
f = open('inputfile','r')
IOError: [Errno 2] No such file or directory: 'inputfile'
and when i ask it to open the actual file i created in my text edit program:
file1.doc
f = open('file1.doc','r')
I get the same message.
I am not sure how to tell it to go to desktop folder in my computer where i
saved that file. Am I missing something, and completely not getting the
point?
Any help would be appreciated.
Thanks so much!
___
Tutor maillist - Tutor@python.org
http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] need help opening a file in idle
Meital Amitai wrote:
Hi everyone,
I am not sure how to open a file in my computer in idle.
For my python class the homework states to write a function that
accepts the name of a file and returns a tuple containing the number
of lines, words and characters in the file. My problem is how do I get
idle to first accept the name of a file. I created a file in text edit
program saved with a .doc extension, saved on my desktop. However the
only way I have learned to open a file in my class is to write
something like:
f = open('inputfile','r')
line = f.readline()
but when i type exactly that into my idle i get the following error
message: Traceback (most recent call last):
File pyshell#12, line 1, in module
f = open('inputfile','r')
IOError: [Errno 2] No such file or directory: 'inputfile'
and when i ask it to open the actual file i created in my text edit
program: file1.doc
f = open('file1.doc','r')
I get the same message.
I am not sure how to tell it to go to desktop folder in my computer
where i saved that file. Am I missing something, and completely not
getting the point?
'file1.doc' is a relative path. It looks in the current directory.
Obviously that file is not in the current directory. So you must provide
the complete path.
That is no longer a Python issue!
The path to the desktop depends on OS and username!
I suggest you put the file in a different directory; one that you can
easily specify.
--
Bob Gailer
Chapel Hill NC
919-636-4239
___
Tutor maillist - Tutor@python.org
http://mail.python.org/mailman/listinfo/tutor
