書中**：
from sys import ar**
from os.path import exists
script, from_file, to_file = ar**
print "copying from %s to %s" % (from_file, to_file)
# we could do these two on one line, how?
in_file = open(from_file)
indata = in_file.read()
print "the input file is %d bytes long" % len(indata)
print "does the output file exist? %r" % exists(to_file)
print "ready, hit return to continue, ctrl-c to abort."
raw_input()
out_file = open(to_file, 'w')
out_file.write(indata)
print "alright, all done."
out_file.close()
in_file.close()
from sys import ar**
from os.path import exists
script, from_file, to_file = ar**
print("copying from %s to %s " % (from_file, to_file))
# we could do these two on one line , how?
in_file = open(from_file)
indata = in_file.read()
print("the input file is %d bytes long" % len(indata))
print("dose the output file exist? %r" % exists(to_file))
print("ready, hit return to continue, ctrl-c to abort.")
input()
out_file = open(to_file, 'w')
out_file.write(indata)
print("alright, all done.")
out_file.close()
in_file.close()
執行該指令碼需要兩個引數，乙個是待拷貝的檔案，乙個是要拷貝至的檔案。我再建立乙個名為 test.txt 的測試檔案，我們將看到如下的結果:
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