test.txt文件内容如下：
one
two
three
four
five
代码如下：
def main():infile = open("test.txt", "r")outfile = open("copy.txt", "w")countLines = countChars = 0for line in infile:countLines += 1countChars += len(line)outfile.write(line)print(countLines, "lines and", countChars, "chars copied")infile.close()outfile.close()main()
