系統環境：win7 32位

python：2.7.13，後改為3.6.1

安裝NLTK

從網站下載：http://www.nltk.org/，完成後雙擊安裝，但提示Python version -32 required, which was not found in the registry.

從網上搜索到以下解決方案：

新建檔案D:\register.py，通過指令碼建立註冊資訊

#===========================register.py=======================================##
#!/usr/bin/env python
# -*- coding:utf-8 -*-
import sys
from _winreg import *

# tweak as necessary
version = sys.version[:3]
installpath = sys.prefix

regpath = "SOFTWARE\\Python\\Pythoncore\\%s\\" % (version)
installkey = "InstallPath"
pythonkey = "PythonPath"
pythonpath = "%s;%s\\Lib\\;%s\\DLLs\\" % (
    installpath, installpath, installpath
)

def RegisterPy():
    
    try:
        reg = OpenKey(HKEY_CURRENT_USER, regpath)
    except EnvironmentError as e:
        try:
            reg = CreateKey(HKEY_CURRENT_USER, regpath)
            SetValue(reg, installkey, REG_SZ, installpath)
            SetValue(reg, pythonkey, REG_SZ, pythonpath)
            CloseKey(reg)
        except:
            print ("*** Unable to register!")
            return
        print ("--- Python", version, "is now registered!")
        return
    if (QueryValue(reg, installkey) == installpath and
        QueryValue(reg, pythonkey) == pythonpath):
        CloseKey(reg)
        print ("=== Python", version, "is already registered!")
        return
    CloseKey(reg)
    print ("*** Unable to register!")
    print ("*** You probably have another Python installation!")

RegisterPy()
 

執行安裝檔案，仍然失敗= =（有大神能解決的請私信或留言 謝謝！）

於是放棄了中文版的NLP with Python，重投http://www.nltk.org/book/。

安裝最新版python3.6.1，cmd中直接執行

py –m pip install nltk

安裝成功。

在IDLE中輸入命令

>>>import nltk
>>>nltk.download()

>>>from nltk.book import *