Use print_function in example-embed

docs/examples/core/example-embed.py

@@ -1,137 +1,138 b''
 #!/usr/bin/env python
 
 """An example of how to embed an IPython shell into a running program.
 
 Please see the documentation in the IPython.Shell module for more details.
 
 The accompanying file example-embed-short.py has quick code fragments for
 embedding which you can cut and paste in your code once you understand how
 things work.
 
 The code in this file is deliberately extra-verbose, meant for learning."""
+from __future__ import print_function
 
 # The basics to get you going:
 
 # IPython sets the __IPYTHON__ variable so you can know if you have nested
 # copies running.
 
 # Try running this code both at the command line and from inside IPython (with
 # %run example-embed.py)
 from IPython.config.loader import Config
 try:
     get_ipython
 except NameError:
     nested = 0
     cfg = Config()
     prompt_config = cfg.PromptManager
     prompt_config.in_template = 'In <\\#>: '
     prompt_config.in2_template = '   .\\D.: '
     prompt_config.out_template = 'Out<\\#>: '
 else:
-    print "Running nested copies of IPython."
-    print "The prompts for the nested copy have been modified"
+    print("Running nested copies of IPython.")
+    print("The prompts for the nested copy have been modified")
     cfg = Config()
     nested = 1
 
 # First import the embeddable shell class
 from IPython.frontend.terminal.embed import InteractiveShellEmbed
 
 # Now create an instance of the embeddable shell. The first argument is a
 # string with options exactly as you would type them if you were starting
 # IPython at the system command line. Any parameters you want to define for
 # configuration can thus be specified here.
 ipshell = InteractiveShellEmbed(config=cfg,
                        banner1 = 'Dropping into IPython',
                        exit_msg = 'Leaving Interpreter, back to program.')
 
 # Make a second instance, you can have as many as you want.
 cfg2 = cfg.copy()
 prompt_config = cfg2.PromptManager
 prompt_config.in_template = 'In2<\\#>: '
 if not nested:
     prompt_config.in_template = 'In2<\\#>: '
     prompt_config.in2_template = '   .\\D.: '
     prompt_config.out_template = 'Out<\\#>: '
 ipshell2 = InteractiveShellEmbed(config=cfg,
                         banner1 = 'Second IPython instance.')
 
-print '\nHello. This is printed from the main controller program.\n'
+print('\nHello. This is printed from the main controller program.\n')
 
 # You can then call ipshell() anywhere you need it (with an optional
 # message):
 ipshell('***Called from top level. '
         'Hit Ctrl-D to exit interpreter and continue program.\n'
         'Note that if you use %kill_embedded, you can fully deactivate\n'
         'This embedded instance so it will never turn on again')
 
-print '\nBack in caller program, moving along...\n'
+print('\nBack in caller program, moving along...\n')
 
 #---------------------------------------------------------------------------
 # More details:
 
 # InteractiveShellEmbed instances don't print the standard system banner and
 # messages. The IPython banner (which actually may contain initialization
 # messages) is available as get_ipython().banner in case you want it.
 
 # InteractiveShellEmbed instances print the following information everytime they
 # start:
 
 # - A global startup banner.
 
 # - A call-specific header string, which you can use to indicate where in the
 # execution flow the shell is starting.
 
 # They also print an exit message every time they exit.
 
 # Both the startup banner and the exit message default to None, and can be set
 # either at the instance constructor or at any other time with the
 # by setting the banner and exit_msg attributes.
 
 # The shell instance can be also put in 'dummy' mode globally or on a per-call
 # basis. This gives you fine control for debugging without having to change
 # code all over the place.
 
 # The code below illustrates all this.
 
 
 # This is how the global banner and exit_msg can be reset at any point
 ipshell.banner = 'Entering interpreter - New Banner'
 ipshell.exit_msg = 'Leaving interpreter - New exit_msg'
 
 def foo(m):
     s = 'spam'
     ipshell('***In foo(). Try %whos, or print s or m:')
-    print 'foo says m = ',m
+    print('foo says m = ',m)
 
 def bar(n):
     s = 'eggs'
     ipshell('***In bar(). Try %whos, or print s or n:')
-    print 'bar says n = ',n
+    print('bar says n = ',n)
     
 # Some calls to the above functions which will trigger IPython:
-print 'Main program calling foo("eggs")\n'
+print('Main program calling foo("eggs")\n')
 foo('eggs')
 
 # The shell can be put in 'dummy' mode where calls to it silently return. This
 # allows you, for example, to globally turn off debugging for a program with a
 # single call.
 ipshell.dummy_mode = True
-print '\nTrying to call IPython which is now "dummy":'
+print('\nTrying to call IPython which is now "dummy":')
 ipshell()
-print 'Nothing happened...'
+print('Nothing happened...')
 # The global 'dummy' mode can still be overridden for a single call
-print '\nOverriding dummy mode manually:'
+print('\nOverriding dummy mode manually:')
 ipshell(dummy=False)
 
 # Reactivate the IPython shell
 ipshell.dummy_mode = False
 
-print 'You can even have multiple embedded instances:'
+print('You can even have multiple embedded instances:')
 ipshell2()
 
-print '\nMain program calling bar("spam")\n'
+print('\nMain program calling bar("spam")\n')
 bar('spam')
 
-print 'Main program finished. Bye!'
+print('Main program finished. Bye!')
 
 #********************** End of file <example-embed.py> ***********************