import sys
def copy(src_fname, dst_fname):
src_fobj = open(src_fname, 'rb')
dst_fobj = open(dst_fname, 'wb')
while True:
data = src_fobj.read(4096)
if not data:
break
dst_fobj.write(data)
src_fobj.close()
dst_fobj.close()
copy(sys.argv[1], sys.argv[2])
# 执行方式
# cp_func.py /etc/hosts /tmp/zhuji.txt
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