How do i use python interactively?

amurleopard

$ python
Python 3.4.0 (default, Jun 19 2015, 14:20:21) 
[GCC 4.8.2] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>

The >>> is the prompt, this a good way to try out code, after you quit the it's gone.

Some very basic commands.

$ python
Python 3.4.0 (default, Jun 19 2015, 14:20:21) 
[GCC 4.8.2] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> 2 + 2
4
>>> print("Hello World")
Hello World
>>>

Help within interactive python

>>> help()

Welcome to Python 3.4!  This is the interactive help utility.

If this is your first time using Python, you should definitely check out
the tutorial on the Internet at http://docs.python.org/3.4/tutorial/.

Enter the name of any module, keyword, or topic to get help on writing
Python programs and using Python modules.  To quit this help utility and
return to the interpreter, just type "quit".

To get a list of available modules, keywords, symbols, or topics, type
"modules", "keywords", "symbols", or "topics".  Each module also comes
with a one-line summary of what it does; to list the modules whose name
or summary contain a given string such as "spam", type "modules spam".

help>

Some help commands

help> keywords

Here is a list of the Python keywords.  Enter any keyword to get more help.

False               def                 if                  raise
None                del                 import              return
True                elif                in                  try
and                 else                is                  while
as                  except              lambda              with
assert              finally             nonlocal            yield
break               for                 not                 
class               from                or                  
continue            global              pass                

help> modules pprint

Here is a list of modules whose name or summary contains 'pprint'.
If there are any, enter a module name to get more help.

pprint - Support to pretty-print lists, tuples, & dictionaries recursively.

help>

To get a man page output, type just the name of the module, topic, keyword, etc

help> pprint
Help on module pprint:

NAME
    pprint - Support to pretty-print lists, tuples, & dictionaries recursively.

MODULE REFERENCE
    http://docs.python.org/3.4/library/pprint
    
    The following documentation is automatically generated from the Python
    source files.  It may be incomplete, incorrect or include features that
    are considered implementation detail and may vary between Python
    implementations.  When in doubt, consult the module reference at the
    location listed above.

DESCRIPTION
    Very simple, but useful, especially in debugging data structures.
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