# Tab completion

l = []


l.append(2)

# Better help system. obj?
l?

# Read the source code of function

def square(no):
    """Square a given number"""
    return no * no

square? # same as help(square)

square??

# Let's display all inbuiltin function in python, starting with s.
# How can we do it ?
# Regex !!!

s*?

# Ipython stores all the input and Output in dictionaries.
# Lets see what was the input for cell 4.

In[4]

Out[4] # Expect KeyError, since Input didn't produce an output.

a = 23; a+23

In[12]

Out[12]

# _ -> Previous cell output
# __ -> previous to previous cell output
print _, __

# *nix has history command, in similar way IPython also has a way to display inputs

%history -n 1-5

# From IPython it is possible to run linux command
# For command with arguments syntax is `%ls -la`
!ls


pwd

# IPython also allows to store output of a command
files = !ls /

print(files)

!echo $files

# In Python any method starting with __ is called magic method. Similarly in IPython %%command is magic function.
%timeit [] + [] # only one line is possible


%%timeit x = range(100000) #multiline is possible
x.append(23)

%%bash
echo "My shell is:" $SHELL

%%ruby
puts "Guido and Matz use Emacs."

%lsmagic

%%writefile hello.py

# -*- coding: utf-8 -*-

def greet(name):
    return "Hello {}".format(name)

if __name__ == "__main__":
    print(greet("Pythonistas!"))


!cat hello.py

%run hello.py

!python hello.py

# We all know cell can take Markdown or code snippet. The output is displayed in browser. So IPython notebook can display Images
# videos, embed, plot graphs etc ...
# Lets show off

from IPython.display import Image, YouTubeVideo
YouTubeVideo("d1a4Jbjc-vU")

Image("/Users/kracekumar/code/imgee/imgee/static/uploads/1b562ef1a0174658ad67dbf19ee5c45e_w75_h76.jpeg")

Image("http://imgs.xkcd.com/comics/python.png")

from IPython.display import HTML
s = """
<table>
    <tr>
        <td> Name </td>
        <td> Twitter </td>
    </tr>
    <tr>
        <td> Kracekumar </td>
        <td> @kracetheking </td>
    </tr>
    <tr>
        <td> James Dennis </td>
        <td> @j2labs </td>
    </tr>
</table>"""
HTML(s)

# How about embeding IFrame ? Soundcloud ?
HTML("""<iframe width="100%" height="166" scrolling="no" frameborder="no" src="https://w.soundcloud.com/player/?url=https%3A//api.soundcloud.com/tracks/114267245&amp;color=ff6600&amp;auto_play=false&amp;show_artwork=true"></iframe>""")

# Future ?
# Lot more features