python3-分割文本文件

#myhaspl@myhaspl.com
fId=1
with open("tf-allsrc.txt","r") as sf: 
    while True:
        with open("tf-src-"+str(fId)+".txt","w+") as f:
            data=sf.read(1024*1024*5)
            if not data:
                break
            f.write(data)
            print(fId,"#",end=".")
        fId+=1

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