String in python use of split method

USE OF SPLIT() FUNCTION IN STRING
COMPUTER SCIENCE 083

What is split() function?
The split() method breaks up a string at the specified separator.
The syntax of split() is:
String_name_variable. ([separator [, maxsplit]])
Both separator and maxsplit are optional

What is separator?
It is a delimiter. The string splits at the
specified separator.
If the separator is not specified, any
whitespace (space, newline etc.)in a string is
a separator.

What is maxsplit?
It defines the maximum number of splits.
The default value of maxsplit is -1,
meaning, no limit on the number of splits.

How split() works in Python?
take one example:
If We Store a sentence given below in a string variable:
“Welcome to the python”

If we go through the string given below:
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
W e l c o m e t o t h e p y t h o n
value starts from 0 for first character
But we need to break the words from the s

Use of split() without any separator or
maxsplit:
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If We use only: split()
Example: nm=“Welcome to the python”
print(nm.split())
------output---------
[‘Welcome’,’to’,’the’,’python’]
If the separator is not specified space work as separator

Use of split() with any separator:
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
W e l c o m e ; t o ; t h e ; p y t h o n
If We use only: split(“;”)
Example: nm=“Welcome;to;the;python”
print(nm.split(“;”))
------output---------
If the separator is specified its break according to those separator mentioned

Use of split() with any separator and
maxsplit:
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
W e l c o m e ; t o ; t h e ; p y t h o n
If We use only: split(“;”,2)
Example: nm=“Welcome;to;the;python”
print(nm.split(“;”,2))
------output---------
[‘Welcome’,’to’,’the;python’]
If the separator is specified and maxsplit given then its break according to maxsplit

Let Us learn more about split() use:
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
How We use split() and store output in another variable.
Then What happens????
Let us understand with the help of example:

First thing that we need to know:
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
That when we declare a variable and store string.
nm=“Welcome to the python”
String character when we want to read
Its read according to index value character by
character.

But what happens when we use method
split():
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
print(nm.split())
It’s break the words according to the separator,
by default separator is spaces.

But what happens when we use method
split():
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
break the words from the string and display output as given below:IT
Now How we access these words that break using
split()

Lets first store the result using split() into
another variable.
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Now let’s store the string using split() into another variable.
wstr=nm.split()
Now when we use print() to display wstr
print(wstr)

Now if you want to display words of
your choice.
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
If we want to display “the”
Welcome
Example: If we want to display
On the basis of our choice
How we display it.
Word one by oneto the python

First thing is to know what happens to a
string, after we use split() function.
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Welcome
Before we use split() string looks like as shown below:
After we use split() its break and store as it shown below:
How it is store in memory, if we go through the output.
to the python[ ], , ,wstr=

On the basis of output, it store words
after split() in memory as shown below.
Welcome to the python[ ], , ,
0 1 2 3
Welcome Store at 0 index values
to Store at 1 index values
the Store at 2 index values
python Store at 3 index values
wstr=

If we want to display “c” from the word
“Welcome”.
Welcome
It means the 4th character from the word.
to the python[ ], , ,
0 1 2 3
So Before we move forward let Us understand
Understand how the words store in memory after using
split() logically.
wstr=

How these words store logically.
Welcome
0,1,2,3 are the index values as shown below:
So how we display the character from each word
0 1 2 3
Now let us understand with an easy method.
wstr=

So first thing we need to understand
that when we split() the string
Welcome
It is store in a variable as shown below:
To make it more easy to understand
0 1 2 3
wstr=

0 1 2 3
To make it more easy to understand
columns
rows 0 1 2 3 4 5 6
0 W e l c o m e
1 t o
2 t h e
3 p y t h o n
So 0 is for first row
So 1 is for Second row
So 2 is for third row
So 3 is for fourth row
wstr=

0 1 2 3
Example: If we want to display “Welcome”
columns
rows 0 1 2 3 4 5 6
0 W e l c o m e
1 t o
2 t h e
3 p y t h o n
wstr=
Welcome

0 1 2 3
Example: If we want to display “c” from a “Welcome”
columns
rows 0 1 2 3 4 5 6
0 W e l c o m e
1 t o
2 t h e
3 p y t h o n
wstr=

0 1 2 3
columnsrows
0 1 2 3 4 5 6
0 W e l c o m e
1 t o
2 t h e
3 p y t h o n
wstr=
So how we display “c” from a “Welcome”
print(wstr[ ]0 )
Welcome
So this part is for
row number.

So if we want to display “c” from the
word “Welcome”
print(wstr[ ]0 )
columns
rows
0 1 2 3 4 5 6
0 W e l c o m e
1 t o
2 t h e
3 p y t h o n
We need row number with column number also.
[ ]3
So the syntax is:
variablename[RowNo][ColNo]
So we add one more [ ] brackets with wstr

So lets take some more examples:
print(wstr[ ][ ])
columns
rows
0 1 2 3 4 5 6
0 W e l c o m e
1 t o
2 t h e
3 p y t h o n
Display “python” first character “p”
Display “the” 3rd character “e”
print(wstr[ ][ ])
3 0
2 2
Ans: p
Ans: e

So you must know that if string is :
“Hello now you know how to use it in python program”
Variable nm store the string given below:
If you use split() wstr=nm.split()
And use print: print(wstr)
----OUTPUT-----
[‘Hello’,’now’,’you’,’know’,’how’,’to’,’use’,’it’,’in’,’python’,’program’]

[‘Hello’,’now’,’you’,’know’,’how’,’to’,’use’,’it’,’in’,’python’,’program’]
So if we want to display ‘use’ from the string then:
print(wstr[6])
use
So if we want to display “k” from the word ‘know’
print(wstr[3][0])

String in python use of split method

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String in python use of split method