[TOOL]文本查找

在文本文件filename 中，查找由系统剪切板（pyperclip）复制的关键词keyWord，并显示从offsetMin 到offsetMax 行的信息。

import pyperclip
import os,sys


filename = r'D:xxx.txt'
offsetMin = -1
offsetMax = 5
def findSth():

    file=open(filename,'r')    
    file_contents=file.readlines()#按行读取全部内容 
    maxCnt = len(file_contents)
    try:
        while True:
            print(f"search:{pyperclip.waitForNewPaste(999)}")            
            os.system ('cls')
            keyWord = pyperclip.paste()
            if keyWord == ''or keyWord == '\n': continue
            lineCnt = 0 # 计算行数                        
            for content in file_contents:    
                if  keyWord in content:          
                    print("")          
                    for j in range(offsetMax-offsetMin):
                        idx = lineCnt+offsetMin+j                   
                        if idx<0 : idx = 0
                        if idx>maxCnt:idx =maxCnt                        
                        print(file_contents[idx],end=' ') 
                lineCnt += 1
            #raise Exception("抛出一个异常") 
    except Exception as e:##EOFError
        os.system ('cls')
    finally:
        file.close()
            
    
if __name__=='__main__':
    while True:
        findSth()