michael at wifi-10-44-54-69 in ~/Dropbox/Projects/cs88/cs88/src/assets/slides/sp24 on main [!?]
👉 python3
Python 3.11.6 (main, Oct  2 2023, 13:45:54) [Clang 15.0.0 (clang-1500.0.40.1)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> [ 0 for item in range(5) ]
[0, 0, 0, 0, 0]
>>> [ item for item in range(5) ]
[0, 1, 2, 3, 4]
>>> [ item * item  for item in range(5) ]
[0, 1, 4, 9, 16]
>>> [ item for item in range(10) if item % 2 == 0 ]
[0, 2, 4, 6, 8]
>>> [ item*item  for item in range(10) if item % 2 == 0 ]
[0, 4, 16, 36, 64]
>>>



>>>
>>> courses = ['DATA C88C', 'DATA 8', 'POLSCI 2', 'MATH 54']
>>> courses[0]
'DATA C88C'
>>> courses[0].split()
['DATA', 'C88C']
>>> courses[0].split('88')
['DATA C', 'C']
>>> courses[0].split('A')
['D', 'T', ' C88C']
>>> courses[0].split()
['DATA', 'C88C']
>>> courses
['DATA C88C', 'DATA 8', 'POLSCI 2', 'MATH 54']
>>> [ course.split() for course in courses ]
[['DATA', 'C88C'], ['DATA', '8'], ['POLSCI', '2'], ['MATH', '54']]
>>> [ course.split()[0] for course in courses ]
['DATA', 'DATA', 'POLSCI', 'MATH']
>>> 'MATH' in [ course.split()[0] for course in courses ]
True
>>> 'DATA C88C'.split('')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ValueError: empty separator
>>> 'DATA C88C'.split()
['DATA', 'C88C']
>>> 'DATA C88C'.split('T')
['DA', 'A C88C']
>>> data = [ course.split() for course in courses ]
>>>
>>>
>>> data
[['DATA', 'C88C'], ['DATA', '8'], ['POLSCI', '2'], ['MATH', '54']]
>>> data[0][0]
'DATA'
>>> data
[['DATA', 'C88C'], ['DATA', '8'], ['POLSCI', '2'], ['MATH', '54']]
>>> data[0]
['DATA', 'C88C']
>>> data[0][0]
'DATA'
>>> data[0][0][0]
'D'
>>> data[2][0][0]
'P'
>>> data
[['DATA', 'C88C'], ['DATA', '8'], ['POLSCI', '2'], ['MATH', '54']]
>>> data = [ course.split() for course in courses ]
>>>


>>> import operators
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'operators'
>>> import operator
>>> operator.add(1, 3)
4
>>> 1 + 3
4
>>> from math import pi, sqrt
>>> pi
3.141592653589793
>>> def square(n):
...     return n * n
...
>>> square(2)
4
>>> square
<function square at 0x1027c14e0>
>>> s =square
>>>
>>>
>>> s =square
>>> s
<function square at 0x1027c14e0>
>>> def sum_generic(n, func):
...     """Sum the first N cubes of natural numbers.
...     >>> sum_cubes(5)
...     225
...     """
...     total = 0
...     print(func)
...     for i in range(n + 1):
...         total += pow(i, 3)
...     return total
...
>>> sum_generic(10, square)
<function square at 0x1027c14e0>
3025
>>>
>>> def sum_generic(n, func):
...     """Sum the first N cubes of natural numbers.
...     >>> sum_cubes(5)
...     225
...     """
...     total = 0
...     for i in range(n + 1):
...         total += func(i)
...     return total
...
>>> sum_generic(10, square)
385
>>> def identity(k):
...     return k
...
>>>
>>> sum_generic(10, identity)
55
>>>
>>>
>>> for i in range(10):
...     print(square(i))
...
0
1
4
9
16
25
36
49
64
81
>>> for i in range(10):
...     print(identity((i))
...
...
...
KeyboardInterrupt
>>> for i in range(10):
...     print(identity(i))
...
0
1
2
3
4
5
6
7
8
9
>>>
>>>
>>> def sum_generic(n, func):
...     total = 0
...     for i in range(n + 1):
...         total += func(i)
...     return total
...
>>> sum_generic(10, square)
385
>>>