Mar 16, 2018
overall the good introductory course of python for data science but i feel it should have covered the basics in more details .specially for the ones who do not have any prior programming background .
Dec 10, 2017
Wow, this was amazing. Learned a lot (mostly thanks to stack overflow) but the course also opened my eyes to all the possibilities available out there and I feel like i'm only scratching the surface!
por Jialie ( Y•
Jul 09, 2017
Bad tutorial video, scattered teaching content, not corresponding homework, lack of material to review the lecture
por Yiming L•
Oct 14, 2017
course too fast, they don't explain anything, just run through example. The worst course I have taken on coursera.
por Stephen B•
Apr 11, 2017
Unorganized and not very useful. The main goal of the course is for you to use Stack Overflow.....SAVE YOURSELF $
por Ana O R•
Mar 28, 2017
This course is a joke. Contents is very very poor. And you will have a lot of problems making the Assigments.
por Lulu L•
Nov 22, 2016
The lectures are insufficient, the homework instructions are incorrect, the autograder is terrible.
por Vikash K•
Jun 22, 2018
pathetic course. Not for anyone who wants to learn python. Its for them who already know python
por Adeel J•
Oct 29, 2017
Instructor is not interested in teaching but just reading out the script
por ROMASANTA, M J (•
Oct 30, 2019
This course is not suited for beginners, who wanted to learn python.
por Sourav S•
Jun 26, 2018
Horrible. Explains nothingJohns Hopkins data science is FAR superior
Aug 27, 2017
Vedio is useless, I only need to go through the code.
por Alireza H•
Nov 10, 2019
the teaching pace is very fast and not so clear.
por Brics C•
Oct 28, 2019
Gap between lecture and assignment is too high.
por james c•
May 01, 2019
Disconnected, too broad, could have been great.
Nov 02, 2018
Worst class ever! The instructor sucks!
por Shivani A•
Sep 24, 2019
Not exactly benefited.Too fast
por Qi X•
Jan 31, 2019
autograding system is terrible
por Bugra S•
Jan 02, 2018
assigments are not clear
por NITIN K S•
Dec 05, 2019
The speed is too fast
por Aino J•
Jan 06, 2020
This was a great course and I learnt a lot! Topics covered include a quick reminder on intermediate python and lots on pandas and some numpy. The weeks 3 and 4 assignments are quite challenging so expect to spend considerably more time than indicated on the course site if you're not experienced with python and pandas. This course is not for coding newbies.
I am proficient in R for data analysis and had dabbled with python before although had no experience with pandas. I was committed to learn the course material and to spend a substantial amount of time doing so. The speed of lectures is fast. I paused often to take notes and to try out the provided notebooks, and I returned to some of the videos when working on the assignments. I found the course assignments good and challenging. The lectures give a good tour of different functions and approaches you may want to use in the assignments, but there isn't much handholding with the assignments and you'll most likely spend quite of bit of time looking things up online in pandas docs and stackoverflow. If you're used to that and generally troubleshooting code, you'll probably be just fine. I spent much more time on the assignments than what is estimated on the site: ~5h for week 2 (vs 1.5h indicated), ~1 day for week 3 (vs 2h), and 2.5 days for week 4 (vs 4h).
Week 1 gives a refresher on how to write functions, list comprehensions, and lambdas in python. If you're familiar with writing loops and functions in other languages, with this material you will get to writing them in python quickly if you invest a bit of time and effort. If you're not yet at the level of confidently writing functions, loops and vectorized alternatives in python or another language, I'd recommend starting with a different, more basic course because the learning curve with this one might be too steep.
Week 2 gives the ins and outs of pandas including creating and querying pandas series and data frames.
Week 3 covers merging data frames, grouping (groupby) with aggregation (agg), applying functions rowwise (apply), and pivoting data (pivot_table) etc. It also gives a whirlwind tour of date/time manipulation using pandas. numpy is also included.
Week 4 has some lectures on distributions and more on numpy. The week consists mainly of the main project assignment where 50% of points are given on data cleaning and munging (contents of weeks 1-3) and the other 50% of points are on modelling and hypothesis testing. It's quite a proper project in the sense that you're given a number of non-clean data files scraped from different places and a hypothesis to test. There are some additional instructions on what format of cleaned data to produce from the different files and what type of test to perform, but for the rest you're on your own.
por LE G X•
Nov 19, 2016
This course was excellent. This course deviates from many garbage MOOC who only work with quiz and can not provide a real python coding challenge experience. Assignements are really tough. But my sense of progress is real.(I have struggled to identify such feel in many pytyhon MOOC). Jupyter base for everythjng is a fantatsic format(it even allows coding mobility betwwen my station at work and my home station through the coding on jupyter in the cloud) . My feedback nevertheless will point to some aspect in my experience and where I think you can improve.
Succeeding the assignement does not mean that we identified the most elegant way to apply all the knowledge of the course(lambdas,list comprehension, grouping..., apply) in our coding. Breaking that barrier is not easy for me unless we are forced at it and so my looping mind is often applied in assignments. A real correction with the answer need to be provided(this is what the real classroom would do, we managed to get to the answer but we could still learn more with an assisted correction just like what the real classroom would do.I understand that you are worry that the model will end up as copy paste on a webpage and will kill your value. You could maybe consider this add_on for paid customers only and only provide it in picture way which can only be paper print and not so easily converted to webpage format.Or you need to find an alegant way to randomize the assignment coding test at each coursera session, which in that case would not bring any forgery issue and you could provide the correction at the end of the course(or after each assigment completed).
Videos are a bit too fast on concepts sometimes.
You could split the assigment in two formats: format where simple principle of the course are first resolved on jupyter notebook (just like the videos case but with more exercices) and complex dataframe case as second assignment .(but please reduce the amounts of case to only 1 or 2, not 3)
You could reduce dataframe case.(I've spend easily 40 hours on assigment here, assigment time is too heavy from my workload as a full time scientist. This needs some carefull tuning.
Overall Great Job
por Victor M S D•
Jan 30, 2017
Very nice Course, You will Learn about how to effectively use Pandas Library for Python and how to treat DataFrames in that ambient, there are nice functions and methods for parsing. The Course is very fast pace, I only have time on the weekends (some of those), so I had to switch dates two times. Also, some materials are very fast, so If you are new in Python, got to be sure if you have mastered prior concepts of the course (Week 2 depends on week 1 and so on ...). A large part of the course involves your own research in Python Docs and StackOverFlow page. As I am an R user, some things are intuitive (and maybe more easier for me to do in R), several of the things in comparison I thought: "Wow, but this is so much easier on R", but at other times I saw the power of Python for parsing tasks or webdata that in the R require too much memory or are more complicated to obtain. R have the problem to treat everything like an object and guided by vectors, but at some parts that makes understand coding details more deeply, at least for me. I still think that the documentation of R the best there is for my purposes, so I will stick with that, but it's great to know how to develop some things in Python, mainly because of my goal of getting some applications to end users. Finally, not much related to the course, but maybe with the change in the platform of the Coursera, the forums seemed a little more confusing and a little more slower than former courses that I took, I think it might have to do with the same course running in parallel on different dates.
por Jakob B•
Nov 19, 2018
Very valuable course for the fearless and stress-resistant. The scope and challenge level of the assignments is excellent. When you finally get the code right, you feel like you can solve any puzzle, because you can only get it right, when you completely understood why it's not giving the correct answer and you get those "Ohhh, that's what's wrong" moments all the time. So there is zero chance, that you will come out of this course having no idea what you actually learned. (Sadly a prevalent feeling at universities nowadays)
Apart from that, there is zero handholding and you MUST understand basic programming concepts. When even the course masters specifically tell you, that you will have to "google around" for that one vital code snippet, they mean it. This irritated me at first, because I expected a course on something to be self-contained (except the pre-conditional knowledge of stats and programming). But after completing it, I realized, that a big part of the professional programmer's workflow indeed does consist of googling for an answer on stackoverflow, since one and the same problem can be solved using a myriad of ways.
Big props to the creators of the assignments. Those were fire!
Best regards from Germany.
por Jiefei W•
Mar 24, 2020
It helps to learn how to clean up datasets in Python. 5 stars for it.
Some information for who want to try this class:
a. The course introduction shows ~18 hrs to complete the course. As a person with limited experience in Python, and as a person who mainly use Excel to deal with datasets for a long time, it took maybe >30 hours: ~4 hours every day for a week, maybe more hours on weekends.
b. The course says an intermediate level. The time spent on lectures might be 1/10 ~1/5 of the time spent on assignments. In other words, self-learning is highly demanded.
c. The discussion forums are helpful. Read through them before starting doing assignments might save time.
Some expectations if the course material will be updated someday in the future:
a. Have a short video to clarify or explain the questions in the assignments. If there are some common questions in the forum over the past years, there are reasons for them. A bit more information might be needed, eg. a math definition for a concept.
b. The auto-grader is great, but it may not provide enough information on why the answer is wrong. For some of the common issues, the code for grading may be provided as material for a better understanding.
por Vinod G•
Nov 19, 2019
Excellent material. Admittedly I can see why there are so many negative reviews about the ambiguity of the assessed tasks. It won't be an easy course for anyone who is unfamiliar with programming. However, if you do have programming experience under your belt, you'll likely find this course strikes an excellent balance in terms of conciseness, practice, and theory. Each lecture is crafted carefully to teach you about some nuance of pandas or numpy, and the programming assignments are packed with coding questions that will help you revise what you have learned, in a very efficient way. There is very little "fluff" in this course, which is a major weakness I've seen in similar courses of its kind. Too much spoon feeding often does not challenge or engage the learner. The course is very direct about what it expects of its students. Every week there is a comment "This week's assignment requires more self-learning than the last". And true to its word, there is less and less hand-holding as you go further into the course. I thoroughly enjoyed the material and probably learned the most out of this course than any other course I've taken on Coursera, taking in to account its length.
por angelo p•
Sep 18, 2017
I am a practicing engineer with over 15 years of experience.This course was definitely not for the faint of heart. While the lectures themselves were crisp and easy to follow, the homework assignments were truly a test of your patience and ability to think through the fundamentals. In all 4 weeks,I took way more than the predicted time to complete the assignments. I still gave the course a 5 because of what it taught me. I would never have learned so much had the assignments just been a rehash of the lecture examples. I applied the material to real world data analysis in my field with very good results. I could not have done the computations I did, if I had not taken the course seriously. There could be more clarity in the assignments especially in week 3 and week 4 but then that's the fun too - in real world data, there is no instructor to watch your back. So mistakes made during the course while frustrating for a working professional with limited time translate to better outcomes in actual work. I must also acknowledge Sophie Greene for her efforts to guide students to think through the problem statements.