Python 3.5.2 |Anaconda 4.1.1 (x86_64)| (default, Jul 2 2016, 17:52:12)

Type "copyright", "credits" or "license" for more information.

IPython 4.2.0 -- An enhanced Interactive Python.

? -> Introduction and overview of IPython's features.

%quickref -> Quick reference.

help -> Python's own help system.

object? -> Details about 'object', use 'object??' for extra details.

%guiref -> A brief reference about the graphical user interface.

In [1]: runfile('/Users/progprim/Desktop/code/fifoqueue_outline.py', wdir='/Users/progprim/Desktop/code')

In [2]: q

Out[2]: []

In [3]: add('Paul')

In [4]: q

Out[4]: ['Paul']

In [5]: q.insert?

Docstring: L.insert(index, object) -- insert object before index

Type: builtin_function_or_method

In [6]: q.extend?

Docstring: L.extend(iterable) -> None -- extend list by appending elements from the iterable

Type: builtin_function_or_method

In [7]: q

Out[7]: ['Paul']

In [8]: q.insert(0, "Mary")

In [9]: q

Out[9]: ['Mary', 'Paul']

In [10]: q.insert("Mary")

Traceback (most recent call last):

File "<ipython-input-10-270ee4b271ac>", line 1, in <module>

q.insert("Mary")

TypeError: insert() takes exactly 2 arguments (1 given)

In [11]: runfile('/Users/progprim/Desktop/code/fifoqueue_outline.py', wdir='/Users/progprim/Desktop/code')

In [12]: add('Paul'); add('Mary')

In [13]: show()

<list_reverseiterator object at 0x1195c1c18>

In [14]: runfile('/Users/progprim/Desktop/code/fifoqueue_outline.py', wdir='/Users/progprim/Desktop/code')

In [15]: add('Paul'); add('Mary')

In [16]: show()

['Mary', 'Paul']

In [17]: len(q)

Out[17]: 2

In [18]: q.remove?

Docstring:

L.remove(value) -> None -- remove first occurrence of value.

Raises ValueError if the value is not present.

Type: builtin_function_or_method

In [19]: q[1:]

Out[19]: ['Mary']

In [20]: q[0]

Out[20]: 'Paul'

In [21]: q.pop?

Docstring:

L.pop([index]) -> item -- remove and return item at index (default last).

Raises IndexError if list is empty or index is out of range.

Type: builtin_function_or_method

In [22]: q

Out[22]: ['Paul', 'Mary']

In [23]: q.pop(0)

Out[23]: 'Paul'

In [24]: q

Out[24]: ['Mary']

In [25]: runfile('/Users/progprim/Desktop/code/fifoqueue_outline.py', wdir='/Users/progprim/Desktop/code')

In [26]: add('Paul'); add('Mary')

In [27]: show()

['Mary', 'Paul']

In [28]: length()

Out[28]: 2

In [29]: next()

Out[29]: 'Paul'

In [30]: length()

Out[30]: 1

In [31]: show()

['Mary']

In [32]: next()

Out[32]: 'Mary'

In [33]: length()

Out[33]: 0

In [34]: next()

Traceback (most recent call last):

File "<ipython-input-34-b80b41363c01>", line 1, in <module>

next()

File "/Users/progprim/Desktop/code/fifoqueue_outline.py", line 26, in next

return q.pop(0)

IndexError: pop from empty list

In [35]: runfile('/Users/progprim/Desktop/code/fifoqueue_outline.py', wdir='/Users/progprim/Desktop/code')

In [36]: next()

The queue is empty.

In [37]: runfile('/Users/progprim/Desktop/code/fifoqueue-alternative.py', wdir='/Users/progprim/Desktop/code')

In [38]: add('Paul'); add('Mary')

In [39]: show()

['Mary', 'Paul']

In [40]: length()

Out[40]: 2

In [41]: next()

Out[41]: 'Paul'

In [42]: next()

Out[42]: 'Mary'

In [43]: runfile('/Users/progprim/Desktop/code/16_while.py', wdir='/Users/progprim/Desktop/code')

epsilon is 1.1102230246251565e-16

In [44]: eps + 1

Out[44]: 1.0

In [45]: 1 + 1e-16

Out[45]: 1.0

In [46]: 2*eps + 1

Out[46]: 1.0000000000000002

In [47]: [0, 2, 4, 6]

Out[47]: [0, 2, 4, 6]

In [48]: a = [0, 2, 4, 6]

In [49]: a

Out[49]: [0, 2, 4, 6]

In [50]: b = a

In [51]: b[1] = 10

In [52]: b

Out[52]: [0, 10, 4, 6]

In [53]: a

Out[53]: [0, 10, 4, 6]

In [54]: id(a)

Out[54]: 4720614664

In [55]: id(b)

Out[55]: 4720614664

In [56]: id(a) == id(b)

Out[56]: True

In [57]: a is b

Out[57]: True

In [58]: c = 1

In [59]: d = 1.0

In [60]: id(c)

Out[60]: 4297148528

In [61]: id(d)

Out[61]: 4720102040

In [62]: c is d

Out[62]: False

In [63]: c == d

Out[63]: True

In [64]: e = 1

In [65]: c is e

Out[65]: True

In [66]: id(c)

Out[66]: 4297148528

In [67]: id(e)

Out[67]: 4297148528

In [68]: e = 2

In [69]: id(e)

Out[69]: 4297148560

In [70]: a = 1*b

In [71]: a

Out[71]: [0, 10, 4, 6]

In [72]: b

Out[72]: [0, 10, 4, 6]

In [73]: a is b

Out[73]: False

In [74]: a = b[:]

In [75]: a is b

Out[75]: False

In [76]: c = 'This is my string'

In [77]: c.split()

Out[77]: ['This', 'is', 'my', 'string']

In [78]: c.split?

Docstring:

S.split(sep=None, maxsplit=-1) -> list of strings

Return a list of the words in S, using sep as the

delimiter string. If maxsplit is given, at most maxsplit

splits are done. If sep is not specified or is None, any

whitespace string is a separator and empty strings are

removed from the result.

Type: builtin_function_or_method

In [79]: c.split()

Out[79]: ['This', 'is', 'my', 'string']

In [80]: c

Out[80]: 'This is my string'

In [81]: c.split('i')

Out[81]: ['Th', 's ', 's my str', 'ng']

In [82]: runfile('/Users/progprim/Desktop/code/lecture4-shoppinglist.py', wdir='/Users/progprim/Desktop/code')

In [83]: !cat cost.txt

bread 1 1.39

tomatoes 6 0.26

milk 3 1.45

coffee 3 2.99

In [84]: runfile('/Users/progprim/Desktop/code/lecture4-shoppinglist.py', wdir='/Users/progprim/Desktop/code')

In [85]: !cat cost.txt

bread 1 1.39

testtomatoes 6 0.26

testmilk 3 1.45

testcoffee 3 2.99

test

In [86]: lines = open('shopping.txt', 'r').readlines()

In [87]: lines

Out[87]:

['bread 1 1.39\n',

'tomatoes 6 0.26\n',

'milk 3 1.45\n',

'coffee 3 2.99\n']

In [88]: processline(lines[0])

Out[88]: 'bread 1 1.39\ntest'

In [89]: data = lines[0]

In [90]: data

Out[90]: 'bread 1 1.39\n'

In [91]: data.split()

Out[91]: ['bread', '1', '1.39']

In [92]: int('1')

Out[92]: 1

In [93]: type(int('1'))

Out[93]: int

In [94]: float('3.14')

Out[94]: 3.14

In [95]: items = data.split()

In [96]: times

Traceback (most recent call last):

File "<ipython-input-96-490f60352181>", line 1, in <module>

times

NameError: name 'times' is not defined

In [97]: items

Out[97]: ['bread', '1', '1.39']

In [98]: price = int(items[1]) * float(items[2])

In [99]: price

Out[99]: 1.39

In [100]: price = int(items[-2]) * float(items[-1])

In [101]: price

Out[101]: 1.39

In [102]: "%10s %4.2f" % (items[0], price)

Out[102]: ' bread 1.39'

In [103]: "%s %4.2f" % (items[0], price)

Out[103]: 'bread 1.39'

In [104]: runfile('/Users/progprim/Desktop/code/lecture4-shoppinglist.py', wdir='/Users/progprim/Desktop/code')

In [105]: !cat costs.txt

cat: costs.txt: No such file or directory

In [106]: !cat cost.txt

bread 1.39tomatoes 1.56milk 4.35coffee 8.97

In [107]: runfile('/Users/progprim/Desktop/code/lecture4-shoppinglist.py', wdir='/Users/progprim/Desktop/code')

In [108]: !cat cost.txt

bread 1.39

tomatoes 1.56

milk 4.35

coffee 8.97

In [109]: items

Out[109]: ['bread', '1', '1.39']

In [110]: name, number, itemcost = items

In [111]: name

Out[111]: 'bread'

In [112]: number

Out[112]: '1'

In [113]: open('shopping.txt', 'rt').readlines()

Out[113]:

['bread 1 1.39\n',

'tomatoes 6 0.26\n',

'milk 3 1.45\n',

'coffee 3 2.99\n']

In [114]: