2.1 BFS: Breadth First Search Implementation in Python | Graph Data Structure

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  • Опубликовано: 23 дек 2024

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  • @ujjwalshrivastava6003
    @ujjwalshrivastava6003 4 года назад +32

    loved those firecrackers after successfully implementing xd

    • @PyTechVision
      @PyTechVision  4 года назад +2

      Thanks Ujjwal, you noticed it🙂

    • @hello-mv6yg
      @hello-mv6yg 2 года назад +1

      @@PyTechVision Thank you so much! This video has really helped me implement breadth first search into my program.

  • @rickey1807
    @rickey1807 5 месяцев назад +2

    finally found BFS implementation in python without OOPs. Grateful!✌

  • @avigeth
    @avigeth 4 года назад +5

    I searched for lot of videos related to graph traversal implementation, most of them are of very long length and does not provide good python implementation.
    You are so much clear and upto point.
    Thanks for your efforts.

    • @PyTechVision
      @PyTechVision  4 года назад

      You are welcome! , and thanks for the feedback.

  • @shreyasr5928
    @shreyasr5928 4 года назад +6

    This basics explaination is what everyone need. Thanks for explaining so good in detail. Good job, keep continuing.

    • @PyTechVision
      @PyTechVision  4 года назад

      Glad it was helpful!

    • @abelfekadu6822
      @abelfekadu6822 3 года назад

      @@PyTechVision I swear this is exactly what I have been searching for;
      for a long time!! very helpful! God Bless You my friend!

  • @hemantx1101
    @hemantx1101 3 года назад +10

    best graph tutorial in python till now , really brother I have watched a lot of videos recently but you are the best one among them you should continue this series best wishes for your channel

  • @vijaykumarsingh5862
    @vijaykumarsingh5862 3 года назад +3

    best tutorial for graph till now in python love it bro make some more

  • @mustafahussain3502
    @mustafahussain3502 Год назад +1

    Sir Allah apko aur apke family ko mahfooz rakhay aur apko jannat mein jagah de. Inshallah

  • @srishtipandey4194
    @srishtipandey4194 4 года назад +6

    You explained it so well.. I never find graph so easy but you made it. Please provide linked list implement in python.

    • @PyTechVision
      @PyTechVision  4 года назад +1

      Thanks Srishti for the feedback, I will upload linked implementation videos soon..

    • @aman-tl9gd
      @aman-tl9gd 4 года назад +1

      you understood graph ,then what even is linked list !

  • @marioedwin8433
    @marioedwin8433 4 года назад +4

    really helpful,thanks a lot.
    i'm preparing for a coding interview where DS and algorithms plays a key role, so i look forward for more videos from u.

  • @praveenbabuveeranki5346
    @praveenbabuveeranki5346 3 года назад +1

    excellent and easy explanation bro

  • @utkarshamalegaonkar2472
    @utkarshamalegaonkar2472 3 года назад +2

    I have 2 csv files. one is straightline distance and other is driving distance. These files are 50 rows * 50 columns. Given initial state I have to reach goal. How should I store such large graph ? How should I process such large file? Any help would be appreciated!

    • @PyTechVision
      @PyTechVision  3 года назад

      I think you can read this csv file and store it in matrix form, and then u can apply weighted graph shortest distance finding algorithm like Dijkstra, you can also share file I can have a look.

    • @utkarshamalegaonkar2472
      @utkarshamalegaonkar2472 3 года назад +1

      @@PyTechVision Can you share email id?

    • @PyTechVision
      @PyTechVision  3 года назад

      @@utkarshamalegaonkar2472 shahrukh_khan_id@outlook.com

    • @utkarshamalegaonkar2472
      @utkarshamalegaonkar2472 3 года назад

      @@PyTechVision emailed

  • @swatidas3009
    @swatidas3009 4 года назад +1

    Best explanation video i came through...👍

  • @ramial-awad9707
    @ramial-awad9707 3 года назад +1

    How would you print out the shortest path from all the nodes to A??

  • @RAHULYADAV-dd3yy
    @RAHULYADAV-dd3yy 3 года назад +1

    Love your videos.. Keep making these type of vids..

  • @shellysinha5429
    @shellysinha5429 3 года назад +1

    Write a function called searchBFS which given the tree or graph as defined below returns every number smaller than 4 in the order it was found using the breadth first technique.

  • @parshuram3272
    @parshuram3272 Год назад +1

    u make it so easy mannn..dammn good..

  • @parsaf3856
    @parsaf3856 3 года назад +2

    Can we use set() to represent the visited nodes? just thought that it will save space..

    • @PyTechVision
      @PyTechVision  3 года назад

      Yes we can use set, but it will take same space.

  • @minip7117
    @minip7117 4 года назад +4

    Very informative... appreciate your Hard work... keep going and keep growing 👍👍👍

  • @tooniatoonia2830
    @tooniatoonia2830 2 года назад +2

    Nice explanation! What if the graph is given as an adjacency matrix instead?

  • @abhishekjain3676
    @abhishekjain3676 2 года назад +2

    bro, this code works perfectly fine for a non cyclic graph. But when it comes to cyclic, the visited vertex has one or more duplicates. Also can we apply bfs for cyclic graphs also.

  • @riyadahsan969
    @riyadahsan969 4 года назад +1

    instead of using a queue i could've also used a normal list and used the append() and pop() functions to enqueue and dequeue right?

    • @PyTechVision
      @PyTechVision  4 года назад +2

      Yes you can use, but you have to pop from the front using pop(o) for your list to behave as a queue.
      But I will suggest you to avoid this because pop(0) will taken O(n) time compared to queue O(1).

  • @kunalsoni7681
    @kunalsoni7681 4 года назад +1

    Very nice explanation 😊

  • @MrAmbarish710
    @MrAmbarish710 4 года назад +2

    Nice Explanation!

  • @BANDLAHYNDAVIBCE
    @BANDLAHYNDAVIBCE 2 года назад +1

    what we need to do if the path is not closed one

  • @saileshsahu8790
    @saileshsahu8790 4 года назад +4

    Pls make whole playlist ASAP.Love your work❤️❤️

    • @PyTechVision
      @PyTechVision  4 года назад +1

      Thanks Sailesh, I will add more videos on this playlist.

    • @saileshsahu8790
      @saileshsahu8790 4 года назад

      @@PyTechVision pls make ASAP ❤️❤️

  • @xlr8919
    @xlr8919 2 года назад +1

    Thank you sir. You explain very well, please make more videos on other topics in python.

  • @vaidehisawant5274
    @vaidehisawant5274 2 года назад +1

    getting an error in the if not visited[v] as bool object not subscriptible pls help

  • @sahuji5874
    @sahuji5874 3 года назад +1

    Very nice video😁

  • @PepeTostado
    @PepeTostado 2 года назад +1

    Amazing videos

  • @bharathkumarn9888
    @bharathkumarn9888 4 года назад +2

    sir, how to import the image

  • @raghavbansal358
    @raghavbansal358 2 года назад +1

    that's a very good explanation!!

  • @vladkojancar4007
    @vladkojancar4007 3 года назад +1

    what if this graph is not given like this, but just like series of random two points that are connected. How can I create such a dict as yours ? (dict in which we know every neighbour of every point)

    • @PyTechVision
      @PyTechVision  3 года назад +1

      I have explained graph representation in different video "Adjacency list implementation". Please watch.
      Thanks for watching

    • @vladkojancar4007
      @vladkojancar4007 3 года назад

      @@PyTechVision I will do it right now, thanks for fast reply ❤️

    • @vladkojancar4007
      @vladkojancar4007 3 года назад

      @@PyTechVision watched and understood. Thank you very much !

  • @vaishnaviwaddepalli3797
    @vaishnaviwaddepalli3797 3 года назад

    Best Video for BFS in python
    Thank you!

  • @vonderasche2963
    @vonderasche2963 3 года назад +1

    Excellent explanation

  • @poojagiri9884
    @poojagiri9884 4 года назад +3

    Can you make video on exploration on matrix representation of graph?

  • @olamashaqi822
    @olamashaqi822 3 года назад +1

    I want to ask if we can ask user to enter the goal and find the shortest path? How we can do that ?

    • @PyTechVision
      @PyTechVision  3 года назад

      I have explained it in same video @8.27

  • @arc8218
    @arc8218 3 года назад +1

    thank you so much
    Btw what software u use ?
    I use vscode

  • @enochcentralfootball2140
    @enochcentralfootball2140 Год назад +1

    why is the level set to -1?

  • @neetugaira1996
    @neetugaira1996 4 года назад +1

    Very well explained 👍

  • @overspiced2284
    @overspiced2284 2 года назад +1

    if there is multiple paths to a node with the same level,
    e.g. 1 to 4 where:
    1: 2, 3
    2: 1, 4
    3: 1, 4
    4: 2, 3
    how can we choose the path where the answer is smallest,
    i.e. 1 2 4

  • @ankitsaini7411
    @ankitsaini7411 4 года назад +3

    Can you also provide video of graph using adjacency matrix .????

    • @PyTechVision
      @PyTechVision  4 года назад

      Yes, I will try to cover adjacency matrix representation.

  • @amankeshwani5911
    @amankeshwani5911 4 года назад +3

    Simple explanation👍👍
    Please make a video on DFS also

    • @PyTechVision
      @PyTechVision  4 года назад

      Already uploaded, Thanks for the feedback

  • @ashishjain3732
    @ashishjain3732 4 года назад +1

    Can we do without queue?

  • @vee-obsidian
    @vee-obsidian 4 года назад +2

    thanks for great tutorial, using bfs, can I print all *possible* paths from start to end node without recursion?

    • @PyTechVision
      @PyTechVision  4 года назад +2

      I think DFS will be better for finding all the possible path from start to node.

  • @uttarakhandwala8745
    @uttarakhandwala8745 4 года назад +1

    Very good explanation

  • @khushibhansali4646
    @khushibhansali4646 3 года назад +1

    Could u provide the time complexity for the above code?

    • @PyTechVision
      @PyTechVision  3 года назад

      The time complexity will be O(V+ E).

  • @sarangkashalkar1851
    @sarangkashalkar1851 4 года назад +2

    Itne jaldi aajtak kisi ko subscribe nahi kiya

    • @PyTechVision
      @PyTechVision  4 года назад

      Thanks Sarang, I am glad that you liked the explanation.

  • @terzon2644
    @terzon2644 2 года назад +1

    Thx a lot. Helped me with my assignment.

  • @seemabheekarry9411
    @seemabheekarry9411 4 года назад +1

    ive got to write code for the FOX,GOOSE,GRAIN AND FARMER puzzel in python using BFS. Can you help plzz

  • @LogicWise
    @LogicWise 2 года назад +1

    Sir please make videos on Algorithms liks bactracking greedy algorithm etc

  • @teckweelow5876
    @teckweelow5876 3 года назад +1

    Hey mate, you're a gem , thanks for the help !

  • @endrendrumedits3235
    @endrendrumedits3235 4 года назад +1

    Please continue to do more videos on data structures .....

  • @GoNguyen-i3k
    @GoNguyen-i3k Год назад +1

    parent[v] = u; what that line do? I don't understand???

  • @bubududucartoon
    @bubududucartoon 4 года назад

    sir will you explain the program dynamically without writting adjacent list

    • @PyTechVision
      @PyTechVision  4 года назад

      I have covered the graph implementation (dynamically) in this video,
      ruclips.net/video/QsAUil2eBZs/видео.html
      Hope it helps,
      Thanks

  • @vivekpisal2857
    @vivekpisal2857 4 года назад +2

    Please make videos on DFS

    • @PyTechVision
      @PyTechVision  4 года назад +1

      I will upload video on DFS and remaining Graph algorithms soon.

  • @souvikbhattacharya9082
    @souvikbhattacharya9082 4 года назад +1

    Can we do this in a directed graph as well ?

    • @PyTechVision
      @PyTechVision  4 года назад +1

      yes it will work for directed graph as well

  • @Loneghost108
    @Loneghost108 2 года назад +1

    Which ide is this

  • @GopalSinghR1
    @GopalSinghR1 4 года назад +1

    Thank you very much for awesome videos

  • @mayurikishore9599
    @mayurikishore9599 4 года назад +2

    Thank you so much for sharing. I really love your content. Please make videos on Dynamic programming and its implementation in python.

    • @PyTechVision
      @PyTechVision  4 года назад

      Noted, I am little busy in some other work, but I will resume after some time with DP .

  • @nehakhan7447
    @nehakhan7447 3 года назад +1

    I loved your content and video. Really good, please make some more videos😊👍🏻

  • @enochcentralfootball2140
    @enochcentralfootball2140 Год назад +1

    why is the parent set to none?

  • @ilmitabassum9600
    @ilmitabassum9600 4 года назад +1

    It shows an keyerror = 8 for the line if not visited[v]

  • @HaseebAhmad-nj3fi
    @HaseebAhmad-nj3fi 3 года назад +1

    i am getting this error on my line 6: 6 queue = Queue() #initilaizing empty queue
    NameError: name 'Queue' is not defined
    can anyone tell me how to resolve this error

    • @PyTechVision
      @PyTechVision  3 года назад +1

      U need to important queue first,
      from queue import Queue

  • @ikennanwankwo7448
    @ikennanwankwo7448 4 года назад +1

    Hi, Please could you make a video implementing Uniform Cost Search in your BFS ad DFS? Thank You

    • @PyTechVision
      @PyTechVision  4 года назад

      Sure , I will upload after some time.

  • @ikennanwankwo7448
    @ikennanwankwo7448 4 года назад +1

    Thank you so much for this. You made it so easy!!

  • @shimanshuyadav5654
    @shimanshuyadav5654 4 года назад +1

    Great video...

  • @mohitkumargautam4060
    @mohitkumargautam4060 4 года назад +1

    please make complete series of graph data structure using python .

    • @PyTechVision
      @PyTechVision  4 года назад +1

      Thanks Mohit for feedback, I will upload more videos on Graph

  • @arc8218
    @arc8218 3 года назад +1

    Can explain more detail about while not queue.empty() and for v in adj_list ?
    bcoz i dont get it how the data flow on that code block
    Im beginners in python
    Reply this comments if u want explain it, thx

  • @beerus789
    @beerus789 4 года назад +1

    Plz make more complicated graph video

  • @anuKhan-s6g
    @anuKhan-s6g 7 месяцев назад +1

    sir ye code kysy mil skta?

  • @arshahin9803
    @arshahin9803 2 года назад +1

    Awesome!!!

  • @rajendrosau1210
    @rajendrosau1210 4 года назад +1

    Nic explain 😁

  • @dariuszkrolicki913
    @dariuszkrolicki913 3 года назад

    Very helpful video, thank you!

  • @spandanagali2981
    @spandanagali2981 4 года назад +1

    Could you please do for Uniform Cost Search and A* also!

  • @nehathossain7530
    @nehathossain7530 3 года назад

    name 'node' is not defined..what is the solution of it?

  • @md.sakibuddin5974
    @md.sakibuddin5974 4 года назад +1

    am facing a problem can you help me out??

    • @PyTechVision
      @PyTechVision  4 года назад

      Sure

    • @md.sakibuddin5974
      @md.sakibuddin5974 4 года назад +1

      @@PyTechVision brother here is showing
      TypeError Traceback (most recent call last)
      in
      14 visited[s]=True
      15 level[s]=0
      ---> 16 queue.put("s")
      17
      18 while not queue.empty():
      TypeError: put() missing 1 required positional argument: 'item'

    • @md.sakibuddin5974
      @md.sakibuddin5974 4 года назад +1

      but i have did it same as you

    • @md.sakibuddin5974
      @md.sakibuddin5974 4 года назад +1

      from queue import Queue
      adj_list = {
      "0":["1","2","3"],
      "1":["0","3","4"],
      "2":["0","3"],
      "3":["0","1","2","5","6"],
      "4":["1","8","7"],
      "5":["3","6"],
      "6":["3","5","7"],
      "7":["4","6","8"],
      "8":["4","7"]
      }
      #bfs code
      visited = {}
      level = {}
      parent = {}
      bfs_traversal_output =[]
      queue=Queue
      for node in adj_list.keys():
      visited[node]=False
      parent[node]=None
      level[node]=-1

      s="0"
      visited[s]=True
      level[s]=0
      queue.put(s)

      while not queue.empty():
      u=queue.get()
      bfs_traversal_output.append(u)

      for v in adj_list[u]:
      if not visited[v]:
      visited[v]=True
      parent[v]=u
      level[v]=level[u]+1
      queue.put(v)





      print(bfs_traversal_output)

    • @md.sakibuddin5974
      @md.sakibuddin5974 4 года назад +1

      can you tell me where is the problem??

  • @graitasukma619
    @graitasukma619 3 года назад +1

    Thanks for helping

  • @iam_khalid
    @iam_khalid 4 года назад +2

    dijikstras algo please with this code

  • @pathiem.musenge5574
    @pathiem.musenge5574 3 года назад +1

    hello thank you for your code i am kindly asking for the python scripts of this please can you share

  • @GoNguyen-i3k
    @GoNguyen-i3k Год назад +1

    Bro you're fucking good

  • @sixanglesSA
    @sixanglesSA 4 года назад +1

    Nice work dude, Can We have the code please?

  • @prashantpandit2031
    @prashantpandit2031 4 года назад +1

    bro make video on DFS ASAP

    • @PyTechVision
      @PyTechVision  4 года назад +1

      Uploaded, ruclips.net/video/FvGCzzfdOLw/видео.html

  • @exploringnaturalbeauty2102
    @exploringnaturalbeauty2102 2 года назад +1

    8:05

  • @shoaibazam4212
    @shoaibazam4212 4 года назад +1

    Not all heroes wear a cape

  • @VIMALANSBAI
    @VIMALANSBAI 2 года назад +1

    next time onwards pls speak loudly sir!

  • @naveenkumar-er4go
    @naveenkumar-er4go 3 года назад +2

    Thank you!!!

  • @rAndOmNeSs26
    @rAndOmNeSs26 4 года назад +2

    Thanks

  • @__goyal__
    @__goyal__ 3 года назад +1

    Wow!

  • @arc8218
    @arc8218 3 года назад +1

    i got KeyError error

    • @arc8218
      @arc8218 3 года назад +1

      nvm, solved lol

  • @hasnainsohail2301
    @hasnainsohail2301 2 года назад +1

    kindly upload the code on git

  • @34g34g
    @34g34g 4 года назад +1

    pl provide code

  • @deepakrawat5193
    @deepakrawat5193 4 года назад +1

    thanks man

  • @yashkapoor508
    @yashkapoor508 4 года назад +1

    100/100

  • @Jamuntv
    @Jamuntv 4 года назад +1

    Why no more videos