Python List Use Cases & Real Time Scenarios | Solve the hardest problem using List Comprehension 🔥

[@shrutisamal]

I have taken up many paid and unpaid python courses from a number of popular programs out there but never got this much clarity and understanding on list comprehension. Your method of teaching with so many real time scenarios is truly exceptional. The content is pure gold. Underrated channel. Thank you so much Sumit Sir! looking forward to the upcoming session

[@sumitmittal07]

Great to hear!

[@vishal-ox3zd]

Hi Sumit Sir , I just love the way you are teaching. I have seen many youtube videos on python but this python course is unique.the content of this course helps me a lot to understand many concepts of python. Please share some more concepts of python which will help data engineers like us. Really you are a great teacher 🙏 Thanks a lot.

[@vandanapatil8182]

Sir we want same type of in depth lectures/playlist on Excel & power BI for Data Analyst with real industry relevant projects 😊

[@arunsundar3739]

it was fun to know & see the benefits of List comprehension & various other concepts of Python, had little hesitancy to learn one another programming language, now i can embrace Python after seeing it is easy to learn from this Python series & also more importantly apply it in Pyspark code :)

[@vandanapatil8182]

Best teacher in india 😊🎉

[@sumitmittal07]

thank you for tour kind words

[@sribalaji7131]

for the world💌

[@faizanmidda1337]

Sir. Also please teach OS module and how to handle excel files. I love the way you teach.

[@gauravrai4398]

🔥🔥🔥🔥🔥🔥🔥🔥 on fire content .... many thanks Sumit Sir .... i am a bit late but catching up on all the videos in this playlist

[@venkateshkannan7398]

Best video on lists and tuples!

[@sumitmittal07]

Yay! Thank you!

[@abhishekn786]

Top notch content sir, really loved it. please upload videos as fast as you can. Thanks

[@sumitmittal07]

glad that you enjoyed the session

[@swapnam1528]

Videos are really helpful. I have not seen such videos with real time examples. i am truly enjoying the sessions. Sir is it possible to create video for oops concepte.

[@Soham_Posts]

how can i learn to implement logic like you sir BTW your videos are too good 😃

[@venkateshkannan7398]

Solution to Assignment3(my tiny contribution). Im using defaultdict(), a subclass of Dictionary. I find it handy when working with lists. from collections import defaultdict company_average = defaultdict(list) for sublist in company: company_average[sublist[2]].append(sublist[3]) average_salaries = {department: sum(salaries) / len(salaries) for department, salaries in company_average.items()} print(average_salaries)

[@sumitmittal07]

that's great

[@mehulthakur5449]

dep_avg_sal = [] emp_department = [ emp[2] for emp in employees ] emp_set = set(emp_department) for emp_dep in emp_set: count = 0 total_sum = 0 for dep_sal in employees: if dep_sal[2] == emp_dep: total_sum += dep_sal[3] count += 1 sal_avg = total_sum / count dep_avg_sal.append((emp_dep, sal_avg)) print(dep_avg_sal)

[@ArpitSrivastava1994]

Very clear and super helpful examples taken

[@sumitmittal07]

Glad it was helpful!

[@attaullahansari592]

Thank you sir!

[@sidhantdorge2445]

Hey guys, Sharing my approach which I used to solve the Assignments that Sumit Sir mentioned in the session Assignment-1: status_list = ['CLOSED', 'PENDING_PAYMENT', 'COMPLETE', 'CLOSED', 'COMPLETE', 'COMPLETE', 'COMPLETE', 'PROCESSING', 'PENDING_PAYMENT', 'PENDING_PAYMENT'] status_list_set = set(status_list) print(status_list_set) order_status_count = [(status,status_list.count(status)) for status in status_list_set] print(order_status_count) Assignment-2: order_list = [ [1, 100, 'success'], [2, 200, 'pending'], [3, 150, 'success'], [4, 300, 'failed'], [5, 400, 'success'], [6, 250, 'pending'], [7, 350, 'failed'], [8, 450, 'success'], [9, 500, 'pending'], [10, 600, 'failed'] ] order_list_status = [orders[2] for orders in order_list] order_list_status_set = set(order_list_status) status_count = [(status, order_list_status.count(status)) for status in order_list_status_set] for status in status_count: print(f"{status[0]} : {status[1]}") Assignment-3: employee_salary = [ [101, 'John', 'IT', 60000], [102, 'Alice', 'HR', 50000], [103, 'Bob', 'Finance', 70000], [104, 'Emma', 'IT', 55000], [105, 'David', 'Finance', 75000], [106, 'Sophia', 'HR', 48000] ] finance_sal=[] it_sal = [] hr_sal = [] for item in employee_salary: if item[2] == "IT": it_sal.append(item[3]) elif item[2] == "HR": hr_sal.append(item[3]) else: finance_sal.append(item[3]) finance_avg_sal = sum(finance_sal)/len(finance_sal) hr_avg_sal = sum(hr_sal)/len(hr_sal) it_avg_sal = sum(it_sal)/len(it_sal) print(f"Finance: Average Salary - {finance_avg_sal}") print(f"IT: Average Salary - {it_avg_sal}") print(f"HR: Average Salary - {hr_avg_sal}") Please feel free to add any suggestions you have or any doubts that you need to clarify, I am happy to help.

[@DileepNelliakkattu]

One problem with this solution is that this code needs to change when the input has more departments, so this is not a generic solution

[@SoumyaBiswas37]

Sir, if I want to take a value during run time and want to add it within the nested list, Can it be possible with list comprehension??

[@prashantchourasiya1202]

Wonderful as expected...

[@ManishSharma-wy2py]

It was great learning ❤

[@vikaschavan6118]

Incredible, i enjoyed thoroughly. Just one question sir when we are doing word count, do you really feel we need to remove duplicate first? For example a paragraph may certain words which were repeated. If we remove duplicates then it will not give the result which we are looking for. Please share your thoughts on this

[@vikaschavan6118]

input_list = ['CLOSED', 'PENDING_PAYMENT', 'COMPLETE', 'CLOSED', 'COMPLETE', 'COMPLETE', 'COMPLETE', 'PROCESSING', 'PENDING_PAYMENT', 'PENDING_PAYMENT'] status_cnt = [(status,input_list.count(status)) for status in input_list] print(status_cnt) #[('CLOSED', 2), ('PENDING_PAYMENT', 3), ('COMPLETE', 4), ('CLOSED', 2), ('COMPLETE', 4), ('COMPLETE', 4), ('COMPLETE', 4), ('PROCESSING', 1), ('PENDING_PAYMENT', 3), ('PENDING_PAYMENT', 3)] unique_status_cnt = list(set(status_cnt)) print(unique_status_cnt) #[('COMPLETE', 4), ('PENDING_PAYMENT', 3), ('CLOSED', 2), ('PROCESSING', 1)] O/P: [('COMPLETE', 4), ('PENDING_PAYMENT', 3), ('CLOSED', 2), ('PROCESSING', 1)] Removing duplicate first--> gives wrong output input_list = ['CLOSED', 'PENDING_PAYMENT', 'COMPLETE', 'CLOSED', 'COMPLETE', 'COMPLETE', 'COMPLETE', 'PROCESSING', 'PENDING_PAYMENT', 'PENDING_PAYMENT'] input_list_unique =list(set(input_list)) #removed duplicates status_cnt = [(status,input_list_unique.count(status)) for status in input_list_unique] print(status_cnt) #[('COMPLETE', 1), ('CLOSED', 1), ('PENDING_PAYMENT', 1), ('PROCESSING', 1)] O/P: [('COMPLETE', 1), ('CLOSED', 1), ('PENDING_PAYMENT', 1), ('PROCESSING', 1)]

[@sidhantdorge2445]

Hello Sumit Sir, Just finished watching all the 4 video in your Python playlist, which are super insightful, just wanted to thank you for starting this course (for free) which will be beneficial for every student/employee. I have just finished the assignments that you mentioned at the end of this session, it was quite fun to solve did find the average salary one a bit tough but did not look for solution on GPT and gave it a shot and I am glad that I was able to solve it.🙂

[@sumitmittal07]

I am really happy to hear this

[@sidhantdorge2445]

Thank you @@sumitmittal07 Sir. For the assignment solutions I just wanted some of your thoughts and the community so should I share it here?.

[@shivamgupta8106]

Hi Sumit Sir we are saying tuple is immutable but tuple inside list is mutable is that correct. for Ex i/p[(100,5),(200,10)] o/p[(100,5,105),(200,10,220)]

[@azharaktherk2432]

For that 3rd assignment it will be very helpful if you can share the solution sir.

[@arpithaks3467]

please share running notes

[@swapnam1528]

nested_lists=[[i,i**2,i**3] for i in range(1,4)] print(nested_lists)

[@sekharG-o7m]

could you pls make a video on cicd pipeline, agile methodology

[@ameerullah2260]

Hello sir, where are you putting notes for viewers? @Sumit Mittal

[@ameerullah2260]

Hello sir, where are you putting notes for viewers?

[@richaandparas4285]

Assignment 3 solution using list comprehension - dept_lst = [emp[2] for emp in emp_lst] dept_set = set(dept_lst) avg_lst = [[dept, sum([emp[3] for emp in emp_lst if emp[2] == dept])/len([x[2] for x in emp_lst if x[2] == dept])] for dept in dept_set]

[@DileepNelliakkattu]

This is working perfectly, Thank you

[@sohamchintawar4015]

Hi Can you please share reference theory material and python files? You mentioned in few videos that its available but I couldn't find it

[@DileepNelliakkattu]

Below is the solution for 3rd question, Please suggest your improvements as this looks very complex to me dept_list=[i[2] for i in data] dept_set=set(dept_list) dept_count=[(i,dept_list.count(i)) for i in dept_set] print(dept_count) dept_sum=[ (j[2],j[3]) for i in dept_set for j in data if j[2]==i] print(dept_sum) for i in dept_count: count = 0 sum = 0 for j in dept_sum: if i[0]==j[0]: count += 1 sum+=j[1] if i[1]==count: avg=sum/count print(f'{i[0]}:Averege salary {avg}')

[@sreenivasulareddy-s1w]

Hi Sumit sir Are you going to cover data libraries like PANDAS and NUMPY as part of these sessions later ?

[@sumitmittal07]

yes I will cover

[@sreenivasulareddy-s1w]

Thank You Sir

[@skjahangir3800]

@@sumitmittal07 sir when will be the next video on Python

[@dhanushkumar7849]

Assignment 2 solution : d=defaultdict(int) for i in trans: status=i[2] d[status]+=1 for a,b in d.items(): print(a,b) Assignment 3 solution : department_salary_sum = defaultdict(int) department_employee_count = defaultdict(int) for _,_,dept,salary in list1: department_salary_sum[dept] += salary department_employee_count[dept] += 1 avg={dept:department_salary_sum[dept]/department_employee_count[dept] for dept in department_salary_sum } for dept, avg_salary in avg.items(): print(f"{dept}: {avg_salary:.2f}")

[@siddhantmishra6581]

Assignment 3: seta = set() for sublist in employee: seta.add(sublist[2]) lista = list(seta) print(lista) IT =[] HR =[] Finance =[] for sublist in employee: if sublist[2] == lista[0]: IT.append(sublist[3]) elif sublist[2] == lista[1]: HR.append(sublist[3]) else: Finance.append(sublist[3]) print("IT :%.2f"%(sum(IT)/len(IT))) print("HR :%.2f"%(sum(HR)/len(HR))) print("Finance :%.2f"%(sum(Finance)/len(Finance)))

[@shantanuchaudhary1176]

Sir please help with assignment 3

[@vishaldeshatwad8690]

Sir How many videos in total does it take to complete the python playlist

[@sumitmittal07]

total 10 in this playlist

[@sakshijain3534]

someone please share solution of assignment 3 using list comprehension

[@pramilasekar1975]

Assignement 1: for word in line_set: result_set.append((word,lines.count(word))) print(result_set) for the above code im getting the below code, [('COMPLETE', 4)] [('COMPLETE', 4), ('PENDING_PAYMENT', 3)] [('COMPLETE', 4), ('PENDING_PAYMENT', 3), ('CLOSED', 2)] [('COMPLETE', 4), ('PENDING_PAYMENT', 3), ('CLOSED', 2), ('PROCESSING', 1)] Please let me know how to get the last row alone?

[@madhusudank9684]

print(result_set) is under for loop. Its an indenting issue. Below updated code will give you the desired result. for word in line_set: result_set.append((word,lines.count(word))) print(result_set)

[@asktostranger8296]

Anyone got notes ???

[@gunjansharma3103]

😃😃

[@asktostranger8296]

Anyone got notes please share 🙏

[@jaykumargupta3647]

Devin ko sab aata h

[@kaladharnaidusompalyam851]

👏👏🫰

[@sakshijain3534]

dep_list=[(1,'JOHN','IT',2000),(2,'sam','IT',2000),(3,'RAM','HR',3000)] dep_list_new= [(line[2],line[3]) for line in dep_list] //[('IT', 2000), ('IT', 2000), ('HR', 3000)] dept_salaries = {} //empty_dict [dept_salaries.setdefault(dept, []).append(salary) for dept, salary in dep_list_new]//{'IT': [2000, 2000], 'HR': [3000]} average_salaries = {dept: sum(salaries) / len(salaries) for dept, salaries in dept_salaries.items()} print(average_salaries)