Python处理数据一个小例子

zhouu

最近用python（3.2的版本）写了根据特定规则，处理数据的一个小程序，用到了一些python常用的基础知识，在此总结一下：
1，python读文件
2，python写文件
3，python的流程控制
4，python的for循环
5，python的集合，或字符串里判断是否存在某个元素
6，python的逻辑或，逻辑与
7，python的正则过滤
8，python的字符串忽略空格，和以某个字符串开头和按某个字符拆分成list
python的打开文件的模式：
关于open 模式：
w     以写方式打开，
a     以追加模式打开 (从 EOF 开始, 必要时创建新文件)
r+     以读写模式打开
w+     以读写模式打开 (参见 w )
a+     以读写模式打开 (参见 a )
rb     以二进制读模式打开
wb     以二进制写模式打开 (参见 w )
ab     以二进制追加模式打开 (参见 a )
rb+    以二进制读写模式打开 (参见 r+ )
wb+    以二进制读写模式打开 (参见 w+ )
ab+    以二进制读写模式打开 (参见 a+ )

处理代码如下：


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("红色词数量: ",len(redset))
print("绿色词数量: ",len(greenset))
#符合1条件的内容写入
f1=open(r"C:\Users\qindongliang\Desktop\tnstxt\result\\"+detailpath+"\\1.txt",encoding="UTF-8",mode="a+")
#符合2条件的内容写入
f2=open(r"C:\Users\qindongliang\Desktop\tnstxt\result\\"+detailpath+"\\2.txt",encoding="UTF-8",mode="a+")
#符合3条件的内容写入
f3=open(r"C:\Users\qindongliang\Desktop\tnstxt\result\\"+detailpath+"\\3.txt",encoding="UTF-8",mode="a+")
#符合4条件的内容写入
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条件写入
fnew.write(line+"\n")#符合1条件写入
else:
flog.write(line+"   不符合条件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+"   不符合条件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+"  不符合条件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+"  不符合条件4"+"\n")
delcount=delcount+1
#print(list[0],"  ",list[1],"  ",list[4])
#print()

flog.write("删除总数目： "+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)