1+ letters = ['r' , 'z' , 'a' ]
2+ zeros = [0 ] * 10
3+ letters_i = ['i' ] * 5
4+ print (letters , zeros , letters_i )
5+
6+ # ['r', 'z', 'a'] [0, 0, 0, 0, 0, 0, 0, 0, 0, 0] ['i', 'i', 'i', 'i', 'i']
7+
8+ concat_lists = letters + zeros + letters_i
9+
10+ print (concat_lists )
11+
12+ # ['r', 'z', 'a', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 'i', 'i', 'i', 'i', 'i']
13+
14+ numbers = list (range (21 ))
15+ print (numbers )
16+
17+ # [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20]
18+
19+ chars = list ("July 2022" )
20+ print (chars )
21+
22+ # ['J', 'u', 'l', 'y', ' ', '2', '0', '2', '2']
23+
24+ print (len (chars )) # 9 characters in July 2022
25+
26+ letters = ['r' , 'z' , 'a' , 'o' , 'd' , 'b' ]
27+ print (letters )
28+ print (letters [0 ]) # returns 1st element/position r
29+ letters [0 ] = 'R'
30+ print (letters ) # ['R', 'z', 'a', 'o', 'd', 'b']
31+
32+ print (letters [0 :3 ]) # ['R', 'z', 'a']
33+
34+ print (letters [:3 ]) # returns same first 3 letters
35+
36+ letters [- 1 ] = 'DD'
37+
38+ print (letters ) # ['R', 'z', 'a', 'o', 'd', 'DD']
39+
40+ print (letters [::2 ]) # ['R', 'a', 'd']
41+
42+ nums = list (range (21 ))
43+ print (nums [::2 ]) # [0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20] prints every other number to 21
44+
45+ print (nums [::- 1 ]) # starts at end and counts back
46+
47+ # [20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0]
48+
49+ # Unpacking lists
50+
51+ nums = [4 , 8 , 12 ]
52+ first_num = nums [0 ]
53+ second_num = nums [1 ]
54+ thrid_num = nums [2 ]
55+
56+ first_num , second_num , third_num = nums
57+ print (first_num , second_num , third_num ) # 4 8 12
58+
59+ nums = [4 , 8 , 12 , 89 , 3901 , - 1 , 78 , 100 ]
60+ first_num , second_num , * msc = nums
61+ print (first_num )
62+ print (second_num )
63+ print (msc )
64+
65+ # 4 first_num
66+ # 8 second_num
67+ # [12, 89, 3901, -1, 78, 100] (msc) puts in seperate list
68+
69+ '''loop'''
70+ letters = ['k' , 'p' , 'c' , 'q' ]
71+ for l in letters :
72+ print (l )
73+
74+ # k
75+ # p
76+ # c
77+ # q
78+
79+ for l in enumerate (letters ):
80+ print (l )
81+
82+ # (0, 'k')
83+ # (1, 'p')
84+ # (2, 'c')
85+ # (3, 'q')
86+
87+ for l in enumerate (letters ):
88+ print (l [0 ], l [1 ]) # prints them outside the tuple
89+
90+ # 0 k
91+ # 1 p
92+ # 2 c
93+ # 3 q
94+
95+ for i , l in enumerate (letters ):
96+ print (i , l )
97+
98+ # 0 k
99+ # 1 p
100+ # 2 c
101+ # 3 q
102+
103+ letter_25 = [25 , 'y' ]
104+ index , letter = letter_25
105+ print (index , letter )
106+
107+ # 25 y
108+
109+ # unpack a tuple
110+
111+ letter_25 = (25 , 'z' )
112+ index , letter = letter_25
113+ print (index , letter )
114+
115+ # 25 z same
116+
117+ letters = ['a' , 'b' , 'c' ]
118+ letters .append ('z' ) # adds z at the end
119+ letters .insert (0 , '>' ) # adds > at first position
120+ print (letters )
121+
122+ # ['>', 'a', 'b', 'c', 'z']
123+
124+ letters .insert (2 , '<' )
125+ print (letters )
126+
127+ # ['>', 'a', '<', 'b', 'c', 'z']
128+
129+ letters .pop ()
130+ print (letters ) # ['>', 'a', '<', 'b', 'c'] z removed
131+
132+ # letters.pop([0]) # does not need [] notation
133+ print (letters )
134+
135+ letters .pop (0 )
136+ print (letters ) # ['a', '<', 'b', 'c'] > sign removed
137+
138+ letters .remove ('c' )
139+ print (letters ) # ['a', '<', 'b'] first occurance of c removed
140+
141+ dup_letters = ['a' , 'b' , 'c' , 'c' , 'd' , 'z' , 'f' , 'f' ]
142+ non_dup_letters = []
143+ print (dup_letters , 'b4 loop' )
144+
145+ for item in dup_letters :
146+ if item not in non_dup_letters :
147+ non_dup_letters .append (item )
148+ print (non_dup_letters , 'after loop' )
149+
150+ # ['a', 'b', 'c', 'c', 'd', 'z', 'f', 'f'] b4 loop
151+ # ['a', 'b', 'c', 'd', 'z', 'f'] after loop
152+
153+ del dup_letters [1 ]
154+ print (dup_letters )
155+
156+ # ['a', 'c', 'c', 'd', 'z', 'f', 'f'] b removed
157+
158+ del dup_letters [0 :5 ]
159+ print (dup_letters ) # ['f', 'f'] removed first 5 items
160+
161+ dup_letters .clear ()
162+ print (dup_letters , 'clear the list' ) # [] clear the list
163+
164+ names = ['Logan' , 'Jean' , 'Peter' ]
165+ print (names .index ('Jean' )) # 1
166+
167+ # print(names.index('Bruce')) # value error not in the list
168+
169+ if 'Bruce' in names :
170+ print (names .index ('Bruce' )) # Doesn't print a value
171+
172+ if 'Logan' in names :
173+ print (names .index ('Logan' )) # 0
174+
175+ dup_letters = ['a' , 'b' , 'c' , 'c' , 'd' , 'z' , 'f' , 'f' ]
176+ print (dup_letters .count ('f' )) # 2 f's
177+ if 'f' in dup_letters :
178+ print (dup_letters .index ('f' ))
179+
180+ nums = [7 , 4 , 8 , 0 , - 1 , 333 ]
181+ nums .sort () # ascending default
182+ print (nums ) # [-1, 0, 4, 7, 8, 333]
183+
184+ nums .sort (reverse = True )
185+ print (nums ) # [333, 8, 7, 4, 0, -1]
186+
187+ # sort modiefies the original list
188+ # sorted does not modify the original list, returns a new list
189+
190+ print (sorted (nums ), 'sorted method' )
191+ print (nums , 'original list' )
192+
193+ # [-1, 0, 4, 7, 8, 333] sorted method
194+ # [333, 8, 7, 4, 0, -1] original list
195+
196+ print (sorted (nums ), 'sorted method' )
197+
198+ dict_a = {'city' : 'portland' , 'state' : 'or' }
199+ print (dict_a ) # {'city': 'portland', 'state': 'or'}
200+
201+ # city = dict_1[0] # will return error
202+
203+ city = dict_a ['city' ]
204+ print (city ) # portland
205+
206+ state = dict_a ['state' ]
207+ print (state ) # or
208+
209+ dict_a ['state' ] = 'ct'
210+
211+ print (dict_a ) # state updated to ct {'city': 'portland', 'state': 'ct'}
212+
213+ dict_a ['zip' ] = 90210
214+
215+ print (dict_a ) # {'city': 'portland', 'state': 'ct', 'zip': 90210}
216+
217+ # print(dict_a['address']) KeyError
218+
219+ if 'address' in dict_a :
220+ print (dict_a ['address' ]) # Does not return anything
221+
222+ print (dict_a .get ('address' )) # None return
223+
224+ print (dict_a .get ('state' )) # ct return
225+
226+ print (dict_a .get ('address' , 'Hey value not found' )) # Hey value not found return
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