1 00:00:01,730 --> 00:00:09,010 So in this session we are going to learn, how we can use python in order to interact with Redis. So I 2 00:00:09,010 --> 00:00:14,650 have created a file, which I am going to load it to Redis first and then we are going to create a python 3 00:00:14,650 --> 00:00:20,020 program and in that python program we'll be passing the Key and we are going to get the Values from 4 00:00:20,030 --> 00:00:20,440 Redis. 5 00:00:26,300 --> 00:00:26,680 So right 6 00:00:26,690 --> 00:00:35,280 Now let's see, what is the keys available in Redis. So if i do Keys * 7 00:00:35,280 --> 00:00:37,490 I do not have anything available in Redis, right now. 8 00:00:45,270 --> 00:00:50,030 Now I have created a student.csv.redis_format File. 9 00:00:50,080 --> 00:00:57,670 So this file contains a Data Set which can be directly uploaded to, or which can be directly inserted 10 00:00:57,670 --> 00:01:06,770 to Redis. So here if you see we have SET Keyword as the first column. 11 00:01:07,150 --> 00:01:12,070 And then second one we have actually the Key Name. So ID is going to be the key name, which is going 12 00:01:12,070 --> 00:01:18,580 to be inserted to Redis and remaining all the values which are, First Name, Last Name, Full Name and address. 13 00:01:18,820 --> 00:01:26,320 I have actually merged everything in to single value by quoting it. 14 00:01:26,380 --> 00:01:33,580 So what Redis is going to do is, Redis is going to set this value as the key and then all this remaining 15 00:01:33,580 --> 00:01:37,970 value is going to be set as Value against key 1 16 00:01:38,320 --> 00:01:47,430 Similarly against Key 3, all this value is going to be set as a Value in Redis. 17 00:01:47,500 --> 00:01:49,770 So now let's load all these value to Redis. 18 00:01:49,780 --> 00:01:56,710 So as we have learnt, we can use Mass Insertion or Redis cli Pipe to perform this bulk insertion. 19 00:01:58,460 --> 00:02:06,660 So the way to do that is, using cat/tmp/ name of the file. 20 00:02:07,300 --> 00:02:14,770 And then you use this Pipe and then you use Redis-cli. You provide the Port Name on which 21 00:02:14,770 --> 00:02:22,600 Redis service is running and then you use --pipe and hit enter. 22 00:02:22,790 --> 00:02:30,660 Now It says it has inserted 5 keys. So basically whatever was there in the file is, treated as one line 23 00:02:30,660 --> 00:02:31,240 item. 24 00:02:31,260 --> 00:02:34,650 So we have 5 Line Items, which is inserted to Redis. 25 00:02:34,680 --> 00:02:37,710 Now let's log into Redis and verify the information. 26 00:02:43,680 --> 00:02:43,970 okay. 27 00:02:44,000 --> 00:02:48,580 So we see, 5 items has been inserted to Redis. 28 00:02:48,600 --> 00:02:54,050 Now if I do Get 1. I'm going to get all the Values which was against key 1. 29 00:02:54,480 --> 00:03:00,620 or you see when I do get 1, I get this thing in return. okay. 30 00:03:00,640 --> 00:03:04,510 So right now we are interacting using Redis cli. 31 00:03:04,510 --> 00:03:10,250 Now let's see how you can make use of Python to interact with this and get the same output. 32 00:03:10,270 --> 00:03:12,310 So I have already created a Python program. 33 00:03:18,280 --> 00:03:19,300 So in this case, 34 00:03:25,600 --> 00:03:29,640 OK we need to Import 1 Library, which is called Redis. OK. 35 00:03:29,680 --> 00:03:36,430 So if you're running Python, you can use either Pip to install Redis or if you're using Conda you can 36 00:03:36,430 --> 00:03:41,620 use Redis, I mean you can install Redis library using Conda 37 00:03:42,520 --> 00:03:42,840 as well. OK. 38 00:03:42,850 --> 00:03:48,820 So once that is done, you can import Redis library and then you need to define a connection to connect 39 00:03:48,820 --> 00:03:50,820 to Redis. 40 00:03:50,830 --> 00:03:55,060 So the way to do that is using Redis. StrictRedis 41 00:03:59,540 --> 00:04:05,680 and then you provide the Host name on which Redis is running. So in our case my python program 42 00:04:05,780 --> 00:04:07,720 and also Redis, both are on the same machine. 43 00:04:07,730 --> 00:04:12,780 So I have just put local host and specify the Port, on which Redis is running. 44 00:04:12,820 --> 00:04:20,730 So in my case Redis is running on 6370. So I provided that Port and then whenever actually 45 00:04:20,740 --> 00:04:26,050 Redis is replying you back, sometimes the information is stored as a byte. okay. 46 00:04:26,070 --> 00:04:30,970 If you just want to Decode that you can put this Decode Response to True. 47 00:04:31,030 --> 00:04:35,100 However, it doesn't require. Here you can check whether you need to put it or not 48 00:04:40,600 --> 00:04:40,930 okay. 49 00:04:40,940 --> 00:04:48,900 So in this program basically i have just created a Function, which is called Get values. in the Get values 50 00:04:48,920 --> 00:04:55,490 we are going to pass a Number, a Key Number, which is going to be let's say either 1 or 2 or 3 and 51 00:04:55,490 --> 00:05:04,090 based on that, what it is going to do is, it is going to call Get function. Ok which is similar to how 52 00:05:04,090 --> 00:05:06,650 we run Get command from Redis-cli. 53 00:05:07,420 --> 00:05:12,880 And then it is going to pass the Key Name. So in return Redis is going to return all the values against 54 00:05:13,120 --> 00:05:20,080 this key and that value we're capturing in value and then we are returning the value. OK if we do not 55 00:05:20,080 --> 00:05:27,320 find anything, we are just exiting and also printing a message, saying there is error in execution and in 56 00:05:27,320 --> 00:05:33,190 the Print Statement, you can see I am calling this function Get Values and I'm passing the First Argument, 57 00:05:33,220 --> 00:05:35,970 which is received while running this program. 58 00:05:35,980 --> 00:05:40,360 So I'm assuming, when we are running this program. We are also going to pass ID. 59 00:05:41,470 --> 00:05:41,710 OK. 60 00:05:41,740 --> 00:05:44,100 So now let's run this program and see this in action. 61 00:05:46,950 --> 00:06:06,790 So the name of the program is load student info.py 62 00:06:06,840 --> 00:06:13,100 So to run this program. I'm going to type, Python space followed by the name of the python program. 63 00:06:13,270 --> 00:06:19,540 And also we need to pass the key number, against which we want to see the value. So let's say if I pass 64 00:06:19,550 --> 00:06:24,580 3. Our expected value should be whatever is stored here. 65 00:06:24,910 --> 00:06:25,230 Okay. 66 00:06:25,250 --> 00:06:26,960 which is stored against key number 3 67 00:06:29,960 --> 00:06:32,620 So let's hit enter and see what is the result we get. 68 00:06:33,600 --> 00:06:36,440 Okay right now I'm getting error that sys is not defined. 69 00:06:36,450 --> 00:06:45,940 So in the beginning I had removed sys, we also need to put sys. Okay because I'm here I'm using sys. 70 00:06:46,130 --> 00:06:53,610 So that's the reason we also need to import this library. So if I run now it should be OK. 71 00:06:53,650 --> 00:06:53,960 All right. 72 00:06:53,990 --> 00:06:57,370 So this time we do not get any error and program is running successfully. 73 00:06:57,380 --> 00:07:03,230 So we have provided Input Value of 3 and it has returned the value which was stored in Redis against 74 00:07:03,230 --> 00:07:03,770 this key. 75 00:07:07,170 --> 00:07:10,720 So if i change the key to 1 76 00:07:10,910 --> 00:07:13,280 So you see, the Return Value has also changed. 77 00:07:16,870 --> 00:07:17,180 okay. 78 00:07:17,220 --> 00:07:20,430 So if I passed 1, this is output which I have received. 79 00:07:24,270 --> 00:07:24,770 OK. 80 00:07:24,800 --> 00:07:30,740 Again this is, this was a very simple program. Just to basically demonstrate you, that there are libraries 81 00:07:30,740 --> 00:07:36,560 available. Which you can make use of in order to connect to Redis using Python program.