最近用python(3.2的版本)寫了根據特定規(guī)則,處理數據的一個小程序,用到了一些python常用的基礎知識,在此總結一下:
1,python讀文件
2,python寫文件
3,python的流程控制
4,python的for循環(huán)
5,python的集合,或字符串里判斷是否存在某個元素
6,python的邏輯或,邏輯與
7,python的正則過濾
8,python的字符串忽略空格,和以某個字符串開頭和按某個字符拆分成list
python的打開文件的模式:
關于open 模式:
w 以寫方式打開,
a 以追加模式打開 (從 EOF 開始, 必要時創(chuàng)建新文件)
r+ 以讀寫模式打開
w+ 以讀寫模式打開 (參見 w )
a+ 以讀寫模式打開 (參見 a )
rb 以二進制讀模式打開
wb 以二進制寫模式打開 (參見 w )
ab 以二進制追加模式打開 (參見 a )
rb+ 以二進制讀寫模式打開 (參見 r+ )
wb+ 以二進制讀寫模式打開 (參見 w+ )
ab+ 以二進制讀寫模式打開 (參見 a+ )
處理代碼如下:
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def showtxt(path,outpathname,detailpath): greenpath = r "C:\\Users\\qindongliang\\Desktop\\tnstxt\\green.txt" ; redpath = r "C:\\Users\\qindongliang\\Desktop\\tnstxt\\red.txt" ; redset = listtxt(redpath) greenset = listtxt(greenpath) print ( "紅色詞數量: " , len (redset)) print ( "綠色詞數量: " , len (greenset)) #符合1條件的內容寫入 f1 = open (r "C:\Users\qindongliang\Desktop\tnstxt\result\\"+detailpath+" \\ 1.txt ",encoding=" UTF - 8 ",mode=" a + ") #符合2條件的內容寫入 f2 = open (r "C:\Users\qindongliang\Desktop\tnstxt\result\\"+detailpath+" \\ 2.txt ",encoding=" UTF - 8 ",mode=" a + ") #符合3條件的內容寫入 f3 = open (r "C:\Users\qindongliang\Desktop\tnstxt\result\\"+detailpath+" \\ 3.txt ",encoding=" UTF - 8 ",mode=" a + ") #符合4條件的內容寫入 f4 = open (r "C:\Users\qindongliang\Desktop\tnstxt\result\\"+detailpath+" \\ 4.txt ",encoding=" UTF - 8 ",mode=" a + ") delcount = 1 ; f = open (path,encoding = "UTF-8" ,mode = "r+" ) fnew = open (outpathname,encoding = "UTF-8" ,mode = "a+" ) flog = open (outpathname + ".log" ,encoding = "UTF-8" ,mode = "a+" ) #count=1; for line in f: list = line.strip().split( "\t" ) line = line.strip() catalogid = list [ 0 ] score = list [ 1 ] keyword = clear( list [ 4 ].strip()) if keyword in redset: if catalogid.startswith( "018022" ) or catalogid.startswith( "018035" ) or catalogid.startswith( "014023003" ) : f1.write(line + "\n" ) #符合1條件寫入 fnew.write(line + "\n" ) #符合1條件寫入 else : flog.write(line + " 不符合條件1 " + "\n" ) delcount = delcount + 1 if keyword in greenset: if not (catalogid.startswith( "018022" ) or catalogid.startswith( "018035" ) or catalogid.startswith( "014023003" )) : fnew.write(line + "\n" ) else : f2.write(line + "\n" ) flog.write(line + " 不符合條件2" + "\n" ) delcount = delcount + 1 flist = formatStrList(keyword) if "sexy" in flist or "sex" in flist: if catalogid.startswith( "018022" ) or catalogid.startswith( "018035" ) or catalogid.startswith( "014023003" ) : f3.write(line + "\n" ) fnew.write(line + "\n" ) else : flog.write(line + " 不符合條件3" + "\n" ) delcount = delcount + 1 #if (keyword.find("underwear")!=-1) & keyword.find("sexy")==-1 & keyword.find("sex")==-1: if "underwear" in flist and "sexy" not in flist and "sex" not in flist: if catalogid.startswith( "014032" ) : f4.write(line + "\n" ) fnew.write(line + "\n" ) else : flog.write(line + " 不符合條件4" + "\n" ) delcount = delcount + 1 #print(list[0]," ",list[1]," ",list[4]) #print() flog.write( "刪除總數目: " + str (delcount)) f.close() f1.close() f2.close() f3.close() f4.close() fnew.close() flog.close() import re def clear( str ): str = re.sub( "[\"\"\'\'+]" ,"", str ) return str def formatStrList(keyword): list = keyword.split( " " ) for item in list : item.strip(); return list def listtxt(path): f = open (path,encoding = "UTF-8" ) s = set () for line in f: s.add(line.strip()) f.close() return s path1 = r "C:\\Users\\qindongliang\\Desktop\\tnstxt\\highfrequency.txt" pathout1 = r "C:\\Users\\qindongliang\\Desktop\\tnstxt\\detail\\a_highfrequency.txt" detail1path = "highfrequency" path2 = r "C:\\Users\\qindongliang\\Desktop\\tnstxt\\highfrequency_d1.txt" pathout2 = r "C:\\Users\\qindongliang\\Desktop\\tnstxt\\detail\\b_highfrequency_d1.txt" detail2path = "highfrequency_d1" #showtxt(path1,pathout1,detail1path) showtxt(path2,pathout2,detail2path) |
以上就是對Python 的數據處理的實例詳解,如有疑問請留言或者到本站社區(qū)交流討論,感謝閱讀,希望能幫助到大家,謝謝大家對本站的支持!
原文鏈接:http://qindongliang.iteye.com/blog/2162304