Python中的切片功能強大。但是切片很容易讓人搞混。 個人覺得Python的文檔不怎麼好,好多東西都是零散的,更像教科書。 下面的參考來自Python3.2文檔和Python參考手冊(第4版): a = [1,2,3,4] x = a[1:2] #a.__getitem__(slice(1,2,None)) slice([start], stop[, step]) Return a slice object representing the set of indices
應用情境: 根據線程數,分割工作清單; ####功能:將list對象N等分def div_list(ls,n):if not isinstance(ls,list) or not isinstance(n,int):return []ls_len = len(ls)if n<=0 or 0==ls_len:return []if n > ls_len:return []elif n == ls_len:return [[i] for i in
Programming Python, 3rd Edition 翻譯 最新版本見: http://wiki.woodpecker.org.cn/moin/PP3eD 22.6. The SWIG Integration Code Generator 22.6. 整合代碼產生器SWIG But don't do that. As you can probably tell, manual coding of C extensions can become
pattern Pattern is a web mining module for the Python programming language. It bundles tools for data retrieval (Google + Twitter + Wikipedia API, web spider, HTML DOM parser), text analysis (rule-based shallow parser, WordNet
Python performance optimization Performance optimization – making a program run faster – is closely related to refactoring. Refactoring makes existing source code more readable and less complex on the inside without
安裝這個是為了更方便的使用python操作hive。 擷取thrift, 在linux命令下: wget http://labs.renren.com/apache-mirror/thrift/0.8.0/thrift-0.8.0.tar.gz tar -xvf thrift-0.8.0.tar.gz cd thrift-0.8.0 ./configure make sudo make install 然後再安裝thrift of
摘要:在進行python指令碼的編寫時,如果我們用python來處理網頁資料或者進行與中文字元有關的處理工作,經常出現這樣的出錯資訊:SyntaxError: Non-ASCII character '\xe6' in file ./filename.py on line 3, but no encoding declared。本文主要講解python中與unicode和中文、特殊字元編碼有關的問題。字元編碼和解碼需要遵循什麼規律。 前言: