print("Hello")

?

import collections
collections.namedtuple?

collections.Counter??

*int*?

%quickref

# type tab after the '.' below:
collections.

2+10

_+10

10+20;

_

_10 == Out[10]

Out

print('last output     :', _)
print('second to last  :', __)
print('third to last   :', ___)

In[11]

_i

_ii

print('last input      :', _i)
print('second to last  :', _ii)
print('third to last   :', _iii)

%history

!pwd

files = !ls
print("My current directory's files:")
print(files)

!echo $files

!echo {files[0].upper()}

%magic

%timeit range(10)

%%timeit
range(10)
range(100)

for i in range(5):
    size = i*100
    print('size:',size, end=' ')
    %timeit range(size)

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

%%file test.txt
This is a test file!
It can contain anything I want...

more...

!cat test.txt

%lsmagic

>>> # Fibonacci series:
... # the sum of two elements defines the next
... a, b = 0, 1
>>> while b < 10:
...     print(b)
...     a, b = b, a+b

In [1]: for i in range(5):
   ...:     print(i)
   ...:     

%matplotlib inline

import numpy as np
import matplotlib.pyplot as plt
from matplotlib.pyplot import gcf

x = np.linspace(0, 2*np.pi, 300)
y = np.sin(x**2)
plt.plot(x, y)
plt.title("A little chirp")
f = gcf()  # let's keep the figure object around for later...

from IPython.nbformat import current
with open('01.1_IPythonIntro.ipynb') as f:
    nb = current.read(f, 'json')

nb.worksheets[0].cells[0:5]