python3替换文本文件中的字符.py，python3.py,#python3替换文本

python3替换文本文件中的字符.py，python3.py,#python3替换文本

#python3替换文本文件中的字符.py#努力把论坛变成一个花样编程论坛~哈哈~~~f="a.txt"s="*.cn"t="FFF空格FFF"#方法1 字符替换def f1(f,s,t):    a=open(f,"r")    txt=a.read()    a=open(f,"w")    txt=txt.replace(s,t)    a.write(txt)    a.close()    print("f1:\n",txt)#f1(f,s,t)#方法2 正则替换import res="\*\.cn"def f2(f,s,t):    a=open(f,"r")    txt=a.read()    a=open(f,"w")    s=re.compile(s)    txt=re.sub(s,t,txt)    a.write(txt)    a.close()    print("\r\nf2:",txt)#f2(f,s,t)#方法3 split切分再jointxt=open(f,"r").read()txt=txt.split("*.cn")txt=t.join(txt)print(txt)'''output:23423回来日3咽螺距3是啊kljsdfsjf;ajs;fdjsafjsklfjklsdjfklsjfklj3klFFF空格FFFkljdsflkklfsjFFF空格FFFkljdfkjdfjdlkjkl*.com'''