In [1]:

    

[6, 28]


    

    
Out[1]:





[6, 28]

In [2]:

    

[1e3, -2, "I am in a list."]


    

    
Out[2]:





[1000.0, -2, 'I am in a list.']

In [3]:

    

[[1.0, 0.0], [0.0, 1.0]]


    

    
Out[3]:





[[1.0, 0.0], [0.0, 1.0]]

In [4]:

    

[1, 1] + [2, 3, 5] + [8]


    

    
Out[4]:





[1, 1, 2, 3, 5, 8]

In [5]:

    

fib = [1, 1, 2, 3, 5, 8]


    

In [6]:

    

fib.append(13)
fib


    

    
Out[6]:





[1, 1, 2, 3, 5, 8, 13]

In [7]:

    

fib.extend([21, 34, 55])
fib


    

    
Out[7]:





[1, 1, 2, 3, 5, 8, 13, 21, 34, 55]

In [8]:

    

fib += [89, 144]
fib


    

    
Out[8]:





[1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144]

In [9]:

    

fib[::2]


    

    
Out[9]:





[1, 2, 5, 13, 34, 89]

In [10]:

    

fib[3] = "whoops"
fib


    

    
Out[10]:





[1, 1, 2, 'whoops', 5, 8, 13, 21, 34, 55, 89, 144]

In [11]:

    

del fib[:5]
fib


    

    
Out[11]:





[8, 13, 21, 34, 55, 89, 144]

In [12]:

    

fib[1::2] = [-1, -1, -1] 
fib


    

    
Out[12]:





[8, -1, 21, -1, 55, -1, 144]

In [13]:

    

[1, 2, 3] * 6


    

    
Out[13]:





[1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3]

In [14]:

    

list("F = dp/dt")


    

    
Out[14]:





['F', ' ', '=', ' ', 'd', 'p', '/', 'd', 't']

In [15]:

    

x = []
x.append(x)
x


    

    
Out[15]:





[[...]]

In [16]:

    

x[0]


    

    
Out[16]:





[[...]]

In [17]:

    

x[0][0]


    

    
Out[17]:





[[...]]

In [18]:

    

x = 42
y = x
del x


    

In [19]:

    

x = [3, 2, 1, "blast off!"]
y = x
y[1] = "TWO"
print(x)


    

    




[3, 'TWO', 1, 'blast off!']

In [20]:

    

a = 1, 2, 5, 3  # length-4 tuple
b = (42,)       # length-1 tuple, defined by comma
c = (42)        # not a tuple, just the number 42
d = ()          # length-0 tuple- no commas means no elements


    

In [21]:

    

(1, 2) + (3, 4)


    

    
Out[21]:





(1, 2, 3, 4)

In [22]:

    

1, 2 + 3, 4


    

    
Out[22]:





(1, 5, 4)

In [23]:

    

tuple(["e", 2.718])


    

    
Out[23]:





('e', 2.718)

In [24]:

    

x = 1.0, [2, 4], 16
x[1].append(8)
x


    

    
Out[24]:





(1.0, [2, 4, 8], 16)

In [25]:

    

# a literal set formed with elements of various types
{1.0, 10, "one hundred", (1, 0, 0,0)}


    

    
Out[25]:





{1.0, 10, (1, 0, 0, 0), 'one hundred'}

In [26]:

    

# a literal set of special values
{True, False, None, "", 0.0, 0}


    

    
Out[26]:





{0, '', None, True}

In [27]:

    

# conversion from a list to a set
set([2.0, 4, "eight", (16,)])


    

    
Out[27]:





{'eight', 2.0, (16,), 4}

In [28]:

    

set("Marie Curie")


    

    
Out[28]:





{' ', 'C', 'M', 'a', 'e', 'i', 'r', 'u'}

In [29]:

    

set(["Marie Curie"])


    

    
Out[29]:





{'Marie Curie'}

In [30]:

    

# A dictionary on one line that stores info about Einstein
al = {"first": "Albert", "last": "Einstein", "birthday": [1879, 3, 14]}

# You can split up dicts onto many lines
constants = {
    'pi': 3.14159,
    "e": 2.718,
    "h": 6.62606957e-34,
    True: 1.0,
    }

# A dict being formed from a list of (key, value) tuples
axes = dict([(1, "x"), (2, "y"), (3, "z")])


    

In [31]:

    

constants['e']


    

    
Out[31]:





2.718

In [32]:

    

axes[3]


    

    
Out[32]:





'z'

In [33]:

    

al['birthday']


    

    
Out[33]:





[1879, 3, 14]

In [34]:

    

constants[False] = 0.0
del axes[3]
al['first'] = "You can call me Al"


    

In [35]:

    

d = {}
d['d'] = d
d


    

    
Out[35]:





{'d': {...}}

In [36]:

    

{}     # empty dict
set()  # empty set


    

    
Out[36]:





set()

In [37]:

    

"N_A" in constants


    

    
Out[37]:





False

In [38]:

    

axes.update({1: 'r', 2: 'phi', 3: 'theta'})
axes


    

    
Out[38]:





{1: 'r', 2: 'phi', 3: 'theta'}