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[no audio]

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Friends, here we are going to

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discuss some more operations on your strings,

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but the result of this operations is Boolean data.

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That means the result you will get like either true or false,

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right? Let me take the operations of your strings which

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will give the result as a Boolean data.

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So before that guys let me open my Python Shell.

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I mean first the command line, then type 'python', and you will

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enter into Python terminal, right. There define any string.

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Let's say, my_str=

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"Hello", anything.

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[no audio]

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Then simply 'print(dir(my_str))'.

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[no audio]

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You have here different

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operations, right. Already

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we know how to get these operations, and already we have seen

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some of the operations like 'upper', 'title', 'swapcase', right,

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and then 'lower', 'capitalize', something 'casefold' we have seen.

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Now, I want to go with some other operations such that

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the result should be either true or false, or whatever the

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operations we are going to discuss now that operation's results

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is like true or false, or simply Boolean data.

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Let's take very simple operation first, 'endswith', right. Guys,

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let me open my editor.

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So I am going to write a Python script name for that, right.

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So let me take Python script name as

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'boolean_result_

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[no audio]

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string_operations'. So guys these operations are very, very helpful

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in your real time.

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Let's say I am taking 'my_str=', suppose simply "Python".

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Okay. Now what I am doing is I am checking,

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'my_str'

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"."

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'startswith("p")'. Is it starting with "p"? In that case you

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will use this operation. See the output. 'False'.

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The reason is you are starting with capital "P",

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but you're checking with small "p".

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Now, is it starting with small capital "P"? Yes, 'True'.

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[no audio]

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Right. So you will take this type of operations in your conditional

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statements. So you will come to know there how to use this.

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Before that you just try to observe the output. The same way

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I can check not only with single letter guys,

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I can also check with word also, no problem.

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'my_str.startswith', let's say "Python". No problem.

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Just check it. Yes, it's 'True'.

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Right. The same way

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you can also check like 'print(my_str.endswith)',

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is it ending with "n"? You can take either single letter, or let's

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say I am taking "hon", no problem.

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I mean group of characters also you can check it.

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The only thing is if the given string is ending with "hon" then

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you will get output as 'True'.

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That's it.

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[no audio]

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So this is starting and ending, right. Then

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let me open your commands,

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I mean your terminal, and see that. Let me take something called

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let's say 'islower'.

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You have likewise, you know so many operations.

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Let me take 'islower'.

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'print(my_str.islower)'.

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I mean is it in lower case letters?

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No, because first letter is capital, remaining all are small

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that's why you'll get output as 'False'. See the output.

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[no audio]

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Then, guys 'islower',

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'isupper', this type of operations are important in your

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real-time. 'isupper'

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this is also 'False' because your letter, your string's, your string

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characters are not, all characters of your string are not in

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uppercase, only first letter,

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that's why you're getting 'isupper' as 'False'.

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Let me take 'my_str.istitle'.

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Yes, you will get 'True'. You know 'title' is nothing but if

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you have suppose some multiple words in a given string

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the first letter of your each and every word should be a

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capital. That format is there no, that's why you are getting 'True'.

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Suppose if I add something like "Python tutorials", now you'll

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get 'False' because in the second word "t" is small.

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Let me take it as a capital and check it now.

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Yes, now it's 'True'.

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Right. So 'title' is done. Likewise

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let me take some, 'isspace'.

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So is there any space in the given string?

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Is there any space in the given string? So for that you can

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use this operation,

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'isspace'. Yes, we have a space

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no, that's why you're going to get output as,

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sorry, 'isspace'

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You're having, along with your space you're having letters as well, right?

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Let me take one more example here, only space. The thing is

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'my_new_str' is only space, right. Now check on your new string

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'isspace'. Is it a space?

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Yes, 'True'.

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But if you observe on your given string, 'my_str' it is the

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combination of spaces and some alphabets.

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That's why it is giving result on this 'False', right?

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That's fine. Now, let me go with one more thing.

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'isalpha'.

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Right. 'isalpha'.

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Nothing but, is your string consists of only alphabets?

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'my_new_str', let me take 'my_str' not 'my_new_str'.

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Let me take our string.

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So what is our string? First

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let me print it. This one, right?

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Is it alpha?

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Yes, 'True' no?

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[no audio]

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Why are we getting 'False'? You have space. Space is not the

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alphabet, right?

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Let me remove that space.

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Now, see the output. You're getting 'True'.

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Right. So space is not alphabet,

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that's why 'isalpha' giving 'False'.

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If you remove that space it will give a 'True'.

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That's fine.

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Now, let me go with the one more thing called 'isnumeric' for

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your numbers, right?

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'isprintable', right, you can print. 'istitle', isupper'.

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Let me take one more thing called 'is', yeah, I will take this

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one, 'isnumeric'.

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[no audio]

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See that I am checking,

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'print(my_str.isnumeric)'.

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What is the output? You are getting output as

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'my_new_str', sorry. That is commented

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no. Let me take 'my_str'.

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See the error is, "my_new_str" is not defined, because we

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commented that. That's why Python is unable to identify that

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variable. Anyway, it's fine. Now see the output. What you

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are getting? 'False'. 'isnumeric',

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see our string is not numeric

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no, our string consists of alphabets.

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Let's redefine your string.

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equals to something which consists of only numbers, a string

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which consists of numbers. Now see the output. You are getting

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'True' because your string consists of only numbers. 'isnumeric'.

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Right. So guys this type of operations are very, very important.

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Right.

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So you have some operations, like you can check by going through

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document. This 'isalnum', 'isalpha',

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'isascii', 'isdecimal', right,

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'isdigit', 'isidentifier', 'islower', 'isnumeric',

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'isprintable', 'isspace'.

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Nothing is there. Simply 'help(str)' you will get all the operations,

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its meaning, right?

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You just go down, by entering 'capitalize'

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there is a meaning, right. 'casefold', right.

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So likewise you have all operations here. Just go with only

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'is' something, like that, which gives the result as Boolean

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data, 'True' or 'False'.

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So this guys, this type of operations are very, very important

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in your real-time.

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You just try to practice with your remaining operations

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which are there like this, right, 'isalpha', 'is' you know,

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'isascii', 'isdecimal', something like that, right. In next video

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we'll see some more operations on your strings, okay?

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Okay guys, thank you for watching this video.

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[no audio]