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# --- picknames.py ---
import os
filenames=os.listdir(os.getcwd())
for name in filenames:
     filenames[filenames.index(name)]=name[:-3]
out=open('names.txt','w')
for name in filenames:
     out.write(name+'\n')
out.close()
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import osºÍÆäËû´ó¶àÊýÓïÑÔÒ»Ñù£¬µ¼ÈëosÕâ¸öº¯Êý¿â£¬ÔÚPythonµÄÊõÓïÀï½ÐÄ£¿é¡£
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for name in filenames:
     filenames[filenames.index(name)]=name[:-3]
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 /* File : example.c */
 #include <time.h>
 double My_variable = 3.0;
 int fact(int n) {
     if (n <= 1) return 1;
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