//Now select File ➝ New in Notepad and type the Python program
# Save the File as classpy.py
# Python classpy.py -i inheri_cpp command to execute c++ program
Python Program:
import sys, os, getopt
def main (argv):
cpp_file ="
exe_file ="
opts.args= getopt.getopt (argv, "i:",['ifile='])
for o, a in opts:
1ifile. ("'-"1", --ifile"):
cpp_file = a + '.cpp'
exe_file = a + '.exe'
run (cppfile, exe_file)
def run(cpp_file, exe_file):
print ("Compiling" + cpp_file)
os.system ('g++ ' + cpp_file + '-o' + exe_file)
print ("Running" + exe_file)
print ("------------------- ")
print
os.system (exe_file)
print
if __name__ =='__main__"
main (sys.argv[1:])

#Now select File⇾New in Notepad and type the Python program
# Save the File as fun.py
# Program that compiles and executes a .cpp file
# Python fun.py -i c:\pyprg\cube_file.cpp
Python Program:
import sys, os, getopt
def main(argv):
cpp_file ="
exe_file ="
opts,args = getopt.getopt(argv, "i:",['ifile='])
for 0, a in opts:
if 0 in ("-i", "--ifile"):
cpp_file = a + '.cpp'
exe_file = a + '.exe'
run(cpp_file, exe_file)
def run(cpp_file, exe_file):
print("Compiling" + cpp_file)
os.system('g++ ' + cpp_file + '-o' + exe_ file)
print("Running" + exe_file)
print(" ----------------- ")
print
os.system( exe_file)
print
if _name_ =='_main_':
main(sys.argv[1:])

//Now select File⟶New in Notepad and type the Python program
# Save the File as transpose.py. Program that compiles and executes a .cpp file
# Python tanspose.py -i trans_cpp
Python Program:
import sys, os, getopt
def main(argv):
cpp_file = "
exe_file = "
opts,args = getopt.getopt(argv, "i:",['ifile='])
for o, a in opts:
if o in ("-i", "< -ifile"):
cpp_file = a + '.cpp'
exe_file = a + '.exe'
run(cpp_file, exe_file)
defrun( cpp _file, exe_file):
print("Compiling" + cpp_file)
'os.system ('g++' + cpp_file + '-o' + exe_file)
print("Running" + exe_file)
print(" -------------------")
print
os.system( exe_file)
print
if __name__ =='__main__"
main( sys.argv[ 1:])

#Now select File￫New in Notepad and type the Python program
# Save the File as pali.py . Program that compiles and executes a .cpp file
# Python c:\pyprg\pali.py -i c:\pyprg\pali_cpp import sys, os, getopt
def main(argv):
cpp_file ="
exe_file = "
opts, args= getopt.getopt(argv, "i:",['ifile='])
for o, a in opts:
if o in ("-i", "--ifile"):
cpp_file = a + '.cpp'
exe_file = a + '.exe'
run(cpp_file, exe_file)
def run(cpp_file, exe_file):
print("Compiling" + cpp_file)
os.system('g++' + cpp_file + '-o' + exe_file)
print("Running" + exe_file)
print("-----------------")
print
os.system(exe_file)
print
if __name__ =='__main__': # program starts executing from here
main(sys.argv[ 1:])

commands for wrapping C++ code:
if___name___ =='___main___':
main(sys.argv[ 1:])
_name_ (A Special variable) in Python:
(i) Since there is no main ( ) function in Python, when the command to run a Python program is given to the interpreter, the code that is at level 0 indentation is to be executed.
(ii) However, before doing that, interpreter will define a few special variables. __name___ is one such special variable which by default stores the name of the file. If the source file is executed as the main program, the interpreter sets the ___name___ variable to have a value as "___main___".
(iii) __name__ is a built-in variable which evaluates to the name of the current module. Thus it can be used to check whether the current script is being run on its own.
(iv) For example consider the following:
if ___name___ ==' ___main___':
main (sys.argv[1:])
(v) if the command line Python program itself is going to execute first, then _main_ contains the name of that Python program and the Python special variable _name_ also contain the Python program name.
(vi) If the condition is true it calls the main which is passed with C++ file as argument.