Skip to content

Commit 0863a49

Browse files
rrupal1506rrupal1506
authored
Add files via upload
solutions done by me
1 parent 68ced35 commit 0863a49

1 file changed

Lines changed: 380 additions & 0 deletions

File tree

‎Basics/Exercise/5_lists/5_lists_exercise_solutions.ipynb‎

Lines changed: 380 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,380 @@
1+
{
2+
"nbformat": 4,
3+
"nbformat_minor": 0,
4+
"metadata": {
5+
"colab": {
6+
"provenance": []
7+
},
8+
"kernelspec": {
9+
"name": "python3",
10+
"display_name": "Python 3"
11+
},
12+
"language_info": {
13+
"name": "python"
14+
}
15+
},
16+
"cells": [
17+
{
18+
"cell_type": "markdown",
19+
"source": [
20+
"# **Exercise: Python Lists**"
21+
],
22+
"metadata": {
23+
"id": "6cCW1Oz8gFww"
24+
}
25+
},
26+
{
27+
"cell_type": "markdown",
28+
"source": [
29+
"1.Let us say your expense for every month are listed below,\n",
30+
"\n",
31+
"January - 2200\n",
32+
"\n",
33+
"February - 2350\n",
34+
"\n",
35+
"March - 2600\n",
36+
"\n",
37+
"April - 2130\n",
38+
"\n",
39+
"May - 2190\n",
40+
"\n",
41+
"Create a list to store these monthly expenses and using that find out,\n",
42+
"\n",
43+
"1. In Feb, how many dollars you spent extra compare to January?\n",
44+
"2. Find out your total expense in first quarter (first three months) of the year.\n",
45+
"3. Find out if you spent exactly 2000 dollars in any month\n",
46+
"4. June month just finished and your expense is 1980 dollar. Add this item to our monthly expense list\n",
47+
"5. You returned an item that you bought in a month of April and\n",
48+
"got a refund of 200$. Make a correction to your monthly expense list\n",
49+
"based on this"
50+
],
51+
"metadata": {
52+
"id": "vWSYW7IogPwH"
53+
}
54+
},
55+
{
56+
"cell_type": "code",
57+
"execution_count": 2,
58+
"metadata": {
59+
"colab": {
60+
"base_uri": "https://localhost:8080/"
61+
},
62+
"id": "GZimmogPfx2N",
63+
"outputId": "80a12abd-6fa1-4f74-f025-d2e455819cd5"
64+
},
65+
"outputs": [
66+
{
67+
"output_type": "stream",
68+
"name": "stdout",
69+
"text": [
70+
"the dollor spent extra compare to january is: 150\n",
71+
"the total expense in first quarter is 7150\n",
72+
"Did I spend 2000$ in any month? False\n",
73+
"the june expense is: [2200, 2350, 2600, 2130, 2190, 1980]\n",
74+
"the april expense is: [2200, 2350, 2600, 1930, 2190, 1980]\n"
75+
]
76+
}
77+
],
78+
"source": [
79+
"expenses = [2200, 2350, 2600, 2130, 2190]\n",
80+
"#how many dollors you spent extra compare to january?\n",
81+
"print(\"the dollor spent extra compare to january is:\",expenses[1]-expenses[0])\n",
82+
"#Find out your total expense in first quarter (first three months) of the year.\n",
83+
"print(\"the total expense in first quarter is\",expenses[0]+expenses[1]+expenses[2])\n",
84+
"#Find out if you spent exactly 2000 dollars in any month\n",
85+
"print(\"Did I spend 2000$ in any month?\",2000 in expenses)\n",
86+
"#June month just finished and your expense is 1980 dollar. Add this item to our monthly expense list\n",
87+
"expenses.append(1980)\n",
88+
"print(\"the june expense is:\",expenses)\n",
89+
"#you returned an item that you bought in a month of April and got a refund of 200$. Make a correction to your monthly expense list based on this\n",
90+
"expenses[3]=expenses[3]-200\n",
91+
"print(\"the april expense is:\",expenses)\n"
92+
]
93+
},
94+
{
95+
"cell_type": "markdown",
96+
"source": [
97+
"**Answer:**Extra spent in February compared to January: 150\n",
98+
"\n",
99+
"Total expense in first quarter: 7150\n",
100+
"\n",
101+
"Did I spend exactly $2000 in any month? False\n",
102+
"\n",
103+
"Expenses after adding June: [2200, 2350, 2600, 2130, 2190, 1980]\n",
104+
"\n",
105+
"Expenses after April refund: [2200, 2350, 2600, 1930, 2190, 1980]\n",
106+
"\n",
107+
"**explanation:**\n",
108+
"expenses = [2200, 2350, 2600, 2130, 2190]\n",
109+
"\n",
110+
"stores monthly expenses from Jan to May.\n",
111+
"\n",
112+
"\n",
113+
"expenses[1] - expenses[0] compares February to January.\n",
114+
"\n",
115+
"\n",
116+
"sum(expenses[0:3]) sums up Jan, Feb, and Mar.\n",
117+
"\n",
118+
"\n",
119+
"2000 in expenses checks if 2000 is present in the list.\n",
120+
"\n",
121+
"\n",
122+
"expenses.append(1980) adds June's expense.\n",
123+
"\n",
124+
"\n",
125+
"expenses[3] = expenses[3] - 200 subtracts $200 refund from April's expense."
126+
],
127+
"metadata": {
128+
"id": "o29oxulTi_Gd"
129+
}
130+
},
131+
{
132+
"cell_type": "markdown",
133+
"source": [
134+
"2.You have a list of your favourite marvel super heros."
135+
],
136+
"metadata": {
137+
"id": "MNJZgCCPj3SA"
138+
}
139+
},
140+
{
141+
"cell_type": "code",
142+
"source": [
143+
"heros=['spider man','thor','hulk','iron man','captain america']"
144+
],
145+
"metadata": {
146+
"id": "jFXWDiKjkDYX"
147+
},
148+
"execution_count": null,
149+
"outputs": []
150+
},
151+
{
152+
"cell_type": "markdown",
153+
"source": [
154+
"Using this find out,"
155+
],
156+
"metadata": {
157+
"id": "RCBWobJzkHSq"
158+
}
159+
},
160+
{
161+
"cell_type": "code",
162+
"source": [
163+
"1. Length of the list\n",
164+
"2. Add 'black panther' at the end of this list\n",
165+
"3. You realize that you need to add 'black panther' after 'hulk',\n",
166+
" so remove it from the list first and then add it after 'hulk'\n",
167+
"4. Now you don't like thor and hulk because they get angry easily :)\n",
168+
" So you want to remove thor and hulk from list and replace them with doctor strange (because he is cool).\n",
169+
" Do that with one line of code.\n",
170+
"5. Sort the heros list in alphabetical order (Hint. Use dir() functions to list down all functions available in list)"
171+
],
172+
"metadata": {
173+
"id": "UnlddeetkL_x"
174+
},
175+
"execution_count": null,
176+
"outputs": []
177+
},
178+
{
179+
"cell_type": "code",
180+
"source": [
181+
"heros=['spider man','thor','hulk','iron man','captain america']\n",
182+
"#Length of the list\n",
183+
"len(heros)\n"
184+
],
185+
"metadata": {
186+
"colab": {
187+
"base_uri": "https://localhost:8080/"
188+
},
189+
"id": "8uIQZGiCkQAP",
190+
"outputId": "333b576c-84ea-4360-c572-95144c2c7e85"
191+
},
192+
"execution_count": 9,
193+
"outputs": [
194+
{
195+
"output_type": "execute_result",
196+
"data": {
197+
"text/plain": [
198+
"5"
199+
]
200+
},
201+
"metadata": {},
202+
"execution_count": 9
203+
}
204+
]
205+
},
206+
{
207+
"cell_type": "markdown",
208+
"source": [
209+
"**Explanation:**\n",
210+
"\n",
211+
"The list heros contains 5 elements.\n",
212+
"\n",
213+
"len(heros) returns the total number of items in the list."
214+
],
215+
"metadata": {
216+
"id": "S2k8rxWMnRs5"
217+
}
218+
},
219+
{
220+
"cell_type": "code",
221+
"source": [
222+
"#Add 'black panther' at the end of this list\n",
223+
"heros.append(\"black panther\")\n",
224+
"print(heros)"
225+
],
226+
"metadata": {
227+
"colab": {
228+
"base_uri": "https://localhost:8080/"
229+
},
230+
"id": "fslozzK5k4y5",
231+
"outputId": "26b9060f-2e9d-49c1-d41b-3048f411796e"
232+
},
233+
"execution_count": 10,
234+
"outputs": [
235+
{
236+
"output_type": "stream",
237+
"name": "stdout",
238+
"text": [
239+
"['spider man', 'thor', 'hulk', 'iron man', 'captain america', 'black panther']\n"
240+
]
241+
}
242+
]
243+
},
244+
{
245+
"cell_type": "markdown",
246+
"source": [
247+
"**Explanation:**\n",
248+
"\n",
249+
"append(\"black panther\") adds the new hero to the end of the list.\n",
250+
"\n",
251+
"The list now contains 6 heroes including \"black panther\" at the last position."
252+
],
253+
"metadata": {
254+
"id": "-VX_3PLDneBe"
255+
}
256+
},
257+
{
258+
"cell_type": "code",
259+
"source": [
260+
"#You realize that you need to add 'black panther' after 'hulk',so remove it from the list first and then add it after 'hulk'\n",
261+
"heros = ['spider man', 'thor', 'hulk', 'iron man', 'captain america', 'black panther']\n",
262+
"heros.remove(\"black panther\")\n",
263+
"heros.insert(3,\"black panther\")\n",
264+
"print(heros)"
265+
],
266+
"metadata": {
267+
"colab": {
268+
"base_uri": "https://localhost:8080/"
269+
},
270+
"id": "MHQJZPryk6vd",
271+
"outputId": "3be7f0b6-68d7-47cc-cef5-a794bf5fc686"
272+
},
273+
"execution_count": 13,
274+
"outputs": [
275+
{
276+
"output_type": "stream",
277+
"name": "stdout",
278+
"text": [
279+
"['spider man', 'thor', 'hulk', 'black panther', 'iron man', 'captain america']\n"
280+
]
281+
}
282+
]
283+
},
284+
{
285+
"cell_type": "markdown",
286+
"source": [
287+
"**Explanation:**\n",
288+
"\n",
289+
"'hulk' is at index 2, so inserting \"black panther\" at index 3 places it right after hulk.\n",
290+
"\n",
291+
"First, remove() deletes \"black panther\" from the end.\n",
292+
"\n",
293+
"Then insert(3, \"black panther\") places it correctly."
294+
],
295+
"metadata": {
296+
"id": "50ElONUhnn1w"
297+
}
298+
},
299+
{
300+
"cell_type": "code",
301+
"source": [
302+
"#Now you don't like thor and hulk because they get angry easily :)So you want to remove thor and hulk from list and replace them with doctor strange (because he is cool). Do that with one line of code.\n",
303+
"heros = ['spider man', 'thor', 'hulk', 'iron man', 'captain america', 'black panther']\n",
304+
"heros[1:3] = ['doctor strange']\n",
305+
"print(heros)"
306+
],
307+
"metadata": {
308+
"colab": {
309+
"base_uri": "https://localhost:8080/"
310+
},
311+
"id": "BRf8ifVallef",
312+
"outputId": "f15283c5-b4f6-453b-c3bf-3f8f1f791778"
313+
},
314+
"execution_count": 14,
315+
"outputs": [
316+
{
317+
"output_type": "stream",
318+
"name": "stdout",
319+
"text": [
320+
"['spider man', 'doctor strange', 'iron man', 'captain america', 'black panther']\n"
321+
]
322+
}
323+
]
324+
},
325+
{
326+
"cell_type": "markdown",
327+
"source": [
328+
"**Explanation:**\n",
329+
"\n",
330+
"heros[1:3] selects the items at index 1 and 2 ('thor' and 'hulk').\n",
331+
"\n",
332+
"Replacing that slice with ['doctor strange'] removes both and adds one in their place.\n",
333+
"\n",
334+
"Clean, short, and effective!"
335+
],
336+
"metadata": {
337+
"id": "IIFFAMFCn4U4"
338+
}
339+
},
340+
{
341+
"cell_type": "code",
342+
"source": [
343+
"#Sort the heros list in alphabetical order (Hint. Use dir() functions to list down all functions available in list)\n",
344+
"heros = ['spider man', 'thor', 'hulk', 'iron man', 'captain america', 'black panther']\n",
345+
"heros.sort()\n",
346+
"print(heros)"
347+
],
348+
"metadata": {
349+
"colab": {
350+
"base_uri": "https://localhost:8080/"
351+
},
352+
"id": "eSJC2MVymcov",
353+
"outputId": "74e2670d-7335-4edc-eeaa-68bd92d4239c"
354+
},
355+
"execution_count": 18,
356+
"outputs": [
357+
{
358+
"output_type": "stream",
359+
"name": "stdout",
360+
"text": [
361+
"['black panther', 'captain america', 'hulk', 'iron man', 'spider man', 'thor']\n"
362+
]
363+
}
364+
]
365+
},
366+
{
367+
"cell_type": "markdown",
368+
"source": [
369+
"**Explanation:**\n",
370+
"\n",
371+
".sort() is an in-place method that sorts the list in alphabetical order.\n",
372+
"\n",
373+
"You can use dir(list) to explore all available methods for list objects, including append, insert, remove, sort, etc."
374+
],
375+
"metadata": {
376+
"id": "AOkbmMM5oDSm"
377+
}
378+
}
379+
]
380+
}

0 commit comments

Comments
 (0)