Michael at dhcp-47-117 in ~/Dropbox/Projects/cs88/cs88/src on master [!]
👉 python2
Python 2.7.17 (default, Oct 24 2019, 12:57:38)
[GCC 4.2.1 Compatible Apple LLVM 11.0.0 (clang-1100.0.33.8)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>>

























>>>
>>>




















>>>
>>> sentence = 'I am taking CS88'
>>> senttence
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'senttence' is not defined
>>> sentence
'I am taking CS88'
>>> sentence.split(' ')
['I', 'am', 'taking', 'CS88']
>>> lst = sentence.split(' ')
>>> " ".join(lst)
'I am taking CS88'
>>> len(sentence)
16
>>> len(lst)
4
>>> lsr
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'lsr' is not defined
>>> lst
['I', 'am', 'taking', 'CS88']
>>> lst + ['What', 'about', 'you?']
['I', 'am', 'taking', 'CS88', 'What', 'about', 'you?']
>>> lst / ['What', 'about', 'you?']
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: unsupported operand type(s) for /: 'list' and 'list'
>>>
>>>
>>> lst[0]
'I'
>>> lst[4]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
IndexError: list index out of range
>>> lst[3]
'CS88'
>>> lst[
.DS_Store                 disc/                     roster/
.gitignore                exam/                     slides/
Makefile                  exclusionary_sol_sharing/ templates/
README.md                 howamidoing/              tutor/
__pycache__/              main/                     web/
assets/                   prob/
config.py                 proj/
>>> lst[
KeyboardInterrupt
>>>
>>>
>>> lst[-1]
'CS88'
>>> lst[ len(lst) - 1]
'CS88'
>>> help(list)

>>> S  =  "Hello, world!"
>>> S
'Hello, world!'
>>> L = [2,0,9,10,11]
>>> [ L[1],  L[2],  L[3] ]
[0, 9, 10]
>>> L[1]
0
>>> L[1:4]]
  File "<stdin>", line 1
    L[1:4]]
          ^
SyntaxError: invalid syntax
>>> L[1:4]
[0, 9, 10]
>>> S[1:4]
'ell'
>>> len(L)
5
>>> L[4]
11
>>> L
[2, 0, 9, 10, 11]
>>> L[0:5]
[2, 0, 9, 10, 11]
>>> L[0:len(L)]
[2, 0, 9, 10, 11]
>>> S[0:5:2]
'Hlo'
>>> S[0] + S[2] + S[4]
'Hlo'
>>> S[0:5:-2]
''
>>> S[0:5:-1]
''
>>> S[5:0:-2]
',le'
>>> S[4:-1:-2]
''
>>> S
'Hello, world!'
>>> S[::-1]
'!dlrow ,olleH'
>>> l
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'l' is not defined
>>> L
[2, 0, 9, 10, 11]
>>> L[::-1]
[11, 10, 9, 0, 2]
>>> L
[2, 0, 9, 10, 11]
>>> L.reverse()
>>> L
[11, 10, 9, 0, 2]
>>> L
[11, 10, 9, 0, 2]
>>> L.reverse()
>>> L
[2, 0, 9, 10, 11]
>>>
>>> range(10)
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>>
(env)
Michael at dhcp-47-117 in ~/Dropbox/Projects/cs88/cs88/src on master [!]
👉 python3
Python 3.10.0 (default, Oct 13 2021, 06:45:00) [Clang 13.0.0 (clang-1300.0.29.3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>>










>>>
>>>
>>> range(10)
range(0, 10)
>>> range(1000000000000000000000000000000)
range(0, 1000000000000000000000000000000)
>>> list( range(0, 10) )
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> list( range(0, 10, 2) )
[0, 2, 4, 6, 8]
>>> range(0, 10, 2)[3]
6
>>> for number in range(10):
...     print(number)
...
0
1
2
3
4
5
6
7
8
9
>>> for char in S:
...     print(char)
...
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'S' is not defined
>>> S = 'Hello, world'
>>> for char in S:
...     print(char)
...
H
e
l
l
o
,

w
o
r
l
d
>>> courses = [ 'CS88', 'DATA8
  File "<stdin>", line 1
    courses = [ 'CS88', 'DATA8
                        ^
SyntaxError: unterminated string literal (detected at line 1)
>>> courses = [ 'CS88', 'DATA8', 'MATH54']
>>> for course in courses:
...     print('I am taking ' + course)
...
I am taking CS88
I am taking DATA8
I am taking MATH54
>>>