Python 3 Notes

Python & NLTK Frequently Asked Questions

Python

1. Accessing command history: How do I quickly bring up a previously entered command?
   [link]
2. I dislike using 'Ctrl-p/n' (or 'Alt-p/n') keys for command history. Can I use ⇧ Up Arrow and ⇩ Down Arrow instead like in most other shell environments?
   [link]
3. How do I save my IDLE shell session into a file?
   [link]
4. Where is my Python installed?
   [link]
5. (Mac) IDLE prints a WARNING message about the Tcl/Tk version. How can I fix this?
   [link]
6. (Mac) I have an older version (10.6, 10.7, 10.8) of Mac OS. How do I install Python?
   [link]
7. (Win) IDLE wants to save my scripts in a weird system directory. How do I change it to use a folder of my choice?
   [link]
8. (Mac) IDLE 'starts in' the 'Documents' folder by default and prompts to save all my scripts there. But I want to organize my Python scripts into a subfolder. How do I change this setting?
   [link]
9. (Win) My file names show up without the extensions (.txt, .py, .pdf, etc.). How do I make them visible?
   [link]
10. I am trying out these commands that I found on a Python tutorial site, but I keep getting an error. What is wrong?
    [link]
11. How do I refer to a file in Python?
    [link]
12. I have this file sitting in my Desktop/My Documents ... area. How do I find its full file path and name?
    [link]
13. I am having trouble reading/writing/loading a particular file. What's wrong?
    [link]
14. OK, so using the full file path and name always works. But I've seen files being referred to by the file name only. How is it done?
    [link]
15. How do I work with CWD (current working directory) in Python shell?
    [link]
16. (Win) My text file shows up with no line break. What gives?
    [link]

NLTK

1. How do I install NLTK 3 (Mac/Linux)?
   [link]
2. How do I install NLTK 3 (Windows)?
   [link]
3. I get a 'Protocol error' (screenshot) while trying to install NLTK. Help! (Mac)
   [link]
4. How do I download corpora and other data for NLTK?
   [link]