The execution environment for Python-based learning code

Class C (object): Def __call__ (self, *args, **kwargs): print "I ' m callable! Called with args:\n ", ARGSC = C () C (' A ', 1) single_code = Compile (" print ' hello,world! ' "," ', ' single ') exec (Single_code) Eval_code = Compile (' 100*3 ', ' ', ' eval ') print eval (eval_code) #exec_code = Compile ("" "req = input (' input: ') #for eachnum in    Range (req): # Print Eachnum "" "," ', ' exec ') #exec (exec_code) Exec "" "x = 0print ' x is currently: ', Xwhile x < 5:x+=1 print ' incrementing x to: ', X "" "#f = Open (' c14.py ') #exec f#print F.tell () #print f.close () #from os.path import GetSize  #getsize (' c14.py ') #f. Seek (0) #exec f#loopmakedashes = ' \ n ' + '-' * 50exec_dict = {' F ': ' "" for%s in%s:print %s "" ", ' s ':" ""%s = 0%s =%s while%s < Len (%s): Print%s[%s]%s =%s + 1 "" ", ' N ':" "" "%s =%d while%s <%d:print%s%s =%s +%d" ""}def Main (): Ltype = Raw_input (' Loop type?[ For/while] ') Dtype = Raw_input (' Data type?[ NUMBER/SEQ] ' if dtype = = ' n ': start = input (' Start value?: ') stop = input (' Ending value?: ') Step = Input (' steping value?: ') seq = str (range (start,stop,step)) def foo (): Return Truedef bar (): ' Bar () does not M Uch ' return truefoo.__doc__ = ' foo () does not much ' Foo.tester = "" "If Foo (): print ' passed ' else:print ' failed '" "            "For Eachattr in Dir (): obj = eval (eachattr) if Isinstance (Obj,type (foo)): If Hasattr (obj, ' __doc__ '): print ' \nfunction '%s ' has a doc string:\n\t%s '% (eachattr,obj.__doc__) if hasattr (obj, ' tester '): P  Rint ' \nfunction '%s ' have tester '% eachattr exec (obj.tester) Else:print '%s function has no  Tester '% eachattr else:print '%s is not a function '% eachattrimport os#print os.system (' ping www.qq.com ') F = Os.popen (' dir ') data = F.readlines () f.close () print data## replace Os.systemfrom subprocess Import callres = Call (' dir '), Shell =true) # # replace Os.popenfrom subprocess Import Pipe,popenf = Popen ((' WMIC ', ' diskdrive '), stdout=pipe). Stdoutdata = F.readlines () f.close () print    DataImport sysdef usage (): print ' At least 2 arguments ' print ' usage:args.py arg1 arg2 [Arg3 ...] Sys.exit (1) argc = Len (sys.argv) #if argc < 3:# usage () Prev_exit_func = getattr (sys, ' exitfunc ', None) def my_exit_func (o Ld_exit=prev_exit_func): If Old_exit is not None and callable (old_exit): Old_exit () Sys.exitfunc = My_exi T_funcdef my_exit (): print ' exit python ' sys.exitfunc = My_exitprint ' Hello,begin exit. ' Sys.exit (1)

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