Trupti: Created page with ''''Title of script''': Manipulating strings '''Author: '''Snehalatha and Trupti '''Keywords: Python, DNA sequences as strings, Protein sequences as strings, ''' '''Outline:- '…'

2014-08-07T05:15:02Z

Created page with ''''Title of script''': Manipulating strings '''Author: '''Snehalatha and Trupti '''Keywords: Python, DNA sequences as strings, Protein sequences as strings, ''' '''Outline:- '…'

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'''Title of script''': Manipulating strings

'''Author: '''Snehalatha and Trupti

'''Keywords: Python, DNA sequences as strings, Protein sequences as strings, '''

'''Outline:- '''

*
**
***
**** Concatanation. (Adding two strings )
**** Replacing a character in a string.
**** Find the position of character in a string.
**** Extracting part of a string.

{| style="border-spacing:0;"
! <center>Visual Cue</center>
! <center>Narration</center>

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Slide 1'''

'''Title Slide'''
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Hello everyone.

Welcome to this tutorial on '''Manipulating Strings''' in '''Python for biologists''' series.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Slide 2'''

'''Learning Objectives'''
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| In this tutorial, we will learn more Python functions to manipulate strings.

* Concatenation. (Adding two strings )
* Replacing a character in a string.
* Find the position of character in a string.
* Extracting part of a string.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Slide 3 '''

'''System Requirements'''

| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| To record this tutorial, I am using

* '''Ubuntu OS version 12.04'''
* '''Python 3.2.3'''
* '''IPython 0.12.1'''

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Slide 4'''

'''Prerequisite'''
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| To practice this tutorial you should be familiar with,

* Basic biochemistry

You can also refer to '''Spoken Tutorials''' on '''Python''' for better understanding of this tutorial.

These are available at '''www.spoken-tutorial.org'''

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Slide 5'''

Python Functions and Methods
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| We have already learnt a few functions and methods like:

* '''len() ''': to find the length of the string
* '''count()''': to count occurrences in a string
* '''lower()''' and '''upper()''' to change the case etc.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Open the terminal by pressing''' Ctrl, Alt and T'''
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Lets switch to the terminal and learn a few more functions and methods.

Press '''Ctrl, Alt '''and '''T''' keys simultaneously

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Cursor on the terminal.

| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| At the prompt type''' ipython 3''' and press enter.

'''IPython''' opens with a prompt.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Cursor on the terminal.
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Lets begin with concatenation:

It means joining two different strings using plus ('''+''')symbol.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Type

'''my_DNA = “ATGC” + “GCAT”'''

Press '''Enter'''

| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| At the prompt:

Type the variable name as,

'''my_DNA '''equal to , in double quotes '''ATGC''' plus again in double quotes '''GCAT'''

press '''Enter'''

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Type '''print(my_DNA)'''
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Now let us print the output.

Type '''print(my_DNA)'''

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Highlight '''ATGCGCAT '''
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Note that the output shows a combination of two strings.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Type,

'''dna1 = “ATGC”'''

'''dna2 = “GCAT”'''

| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| We can also concatenate two different strings stored in different variables.

'''dna1 = “ATGC”''' press '''Enter'''

'''dna2 = “GCAT”''' press '''Enter'''

Concatenate the two strings using plus symbol.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Type,

'''dna3 = “dna1” + “dna2”'''

| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Lets store the new string in variable called '''dna3.'''

Type

'''dna3 = “dna1” + “dna2”''' press '''Enter'''

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Highlight

'''"ATGCGCAT"'''
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| We get an output '''"ATGCGCAT"'''

Note that the two strings are combined to form a new string.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"|
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Another very useful method often used is,

Replace a character in a string with another.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Type '''my_DNA = "ATGCGCAT"'''
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| For example lets store a DNA sequence in a variable

Type,

'''my_DNA = "ATGCGCAT"'''

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"|
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| To replace all the '''Thiamine''' in the string with U'''raci'''l i.e, to convert the DNA to RNA sequence.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Type

'''my_DNA.replace(“T” , “U”)'''

Press''' Enter'''
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Type

The variable name ,

'''my_DNA'''

Dot

replace

With in brackets in quotes '''T''' space comma space within quotes''' U'''

Press '''Enter'''

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Highlight '''AUGCGCAU'''
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The output shows the string with all the '''Thiamine''' replaced with '''Uracil'''.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"|
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| We can also replace more than one character in a string.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Press up arrow to get variable '''my_DNA = “ATGCGCAT”'''
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Lets demonstrate this:

Press up arrow to get variable '''my_DNA = “ATGCGCAT”'''

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"|
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| We will replace a part of the string with a new set of characters.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Type

'''my_DNA.replace('GCGC' , 'CATG')'''

Press '''Enter'''
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Type

'''my_DNA'''

dot

'''replace'''

within brackets in quotes '''GCGC''' space comma space within quotes '''CATG'''

Press '''Enter'''

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Highlight output

'''ATCATGAT'''
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The output shows the part of the string is replaced by a new one.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"|
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| We will now learn how to find the position of a character in a string.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"|
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Lets make use of a protein sequence as an example

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Type,

'''my_protein = <tt>"alspadkanl”'''</tt>
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| At the prompt type

'''my_protein = <tt>"alspadkanl”'''</tt>

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"|
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| To find the position of '''Proline''', which is represented as alphabet p:

We will make use of method '''find.'''

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Type

'''my_protein.find(“p”)'''

Press''' Enter'''
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Type the name of the variable i.e,

'''my_protein''' followed by dot find in brackets in single quotes''' p'''.

Press '''Enter'''

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Highlight 3
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Output shows number '''3'''.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"|
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| In Python,

We count the characters in the string starting from 0 instead of 1.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Highlight '''a'''
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Position zero is first character in the string I.e, A'''lanine'''.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Highlight p
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Position three is therefore '''Proline'''.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Type

'''my_protein.find(“d”)'''

'''Press Enter'''
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Lets practice with a couple of more examples.

Type

'''my_protein.find(“d”)''' for '''Aspartic''' '''acid'''.

Press '''Enter'''

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Highlight '''5'''
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Output shows number 5, which is the 6th position in the string.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Type

'''my_protein.find(“a”)''' for '''Alanine'''.

Press '''Enter'''
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| To find alanine , type

'''my_protein.find(“a”)''' for '''Alanine'''.

Press '''Enter'''

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Highlight '''0'''
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Output shows 0, which is the first position on the string,

This is also the position which it occurs first on the string.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Assignment

slide 6
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| What will be the output if we try to find an '''Amino acid '''that is not found on the string.

Make note of your observations.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Press up arrow key
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Back to the terminal again.

Press up arrow key to get the command

'''my_protein = <tt>"alspadkanl”'''</tt>

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"|
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Often we may need only a part of the string to work with.

This process is called '''extracting''' a substring.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Highlight''' spad'''
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| As an example we will try to extract '''spad''' from the above sequence.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Type

'''<nowiki>my_protein[ 2:6] </nowiki>'''

Press '''Enter'''

| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| To extract a part of the string stored in a variable:

Type '''<nowiki>my_protein[2:6]</nowiki>'''

Enclosed in these brackets are start and stop positions separated by a colon.

The positions are '''inclusive''' at the start,

but '''exclusive''' at the stop .

Type

'''<nowiki>my_protein[2:6] </nowiki>'''

Press '''Enter'''

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Highlight '''s '''and '''d'''
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Output shows '''spad''', which means:

The expression '''<nowiki>my_protein[ 2:6]</nowiki>''' extracts the portion of the string:

starting at third character I.e, 's' and ends before 7th I.e, 'd' which is 6th character.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Type

'''<nowiki>my_protein[0:3]</nowiki>'''

'''Press Enter'''

'''<nowiki>my_protein[5:7]</nowiki>'''

'''Press Enter'''
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| We will demonstrate with a few more examples.

Type

<nowiki>my_protein[0:3]</nowiki>

Press Enter

<nowiki>my_protein[5:7]</nowiki>

Press Enter

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"|
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Observe the output.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Slide 7'''

Summary
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Let's summarize what we have learnt in this tutorial

* Concatenation (Adding two strings )
* Replacing a character in a string.
* Find the position of character in a string.
* Extracting part of a string.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Assignment'''

'''slide 8'''
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| As an assignment

Find the position of '''ash''' in the given protein sequence.

'''aksdhashdaks'''

Extract a fragment '''hashd''' from the sequence.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Slide 9'''

'''About Spoken Tutorial Project '''

| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The video available at the following link summarizes the Spoken Tutorial project. Pls watch it.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Slide 10'''

'''About Spoken Tutorial workshops'''
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team conducts workshops and gives certificates to those who pass an online test.

For more details, please write to us.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Slide 11'''

'''Acknowledgement'''
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Spoken Tutorial ProjecThese 3 slides remain as before, on LaTeX. Only the narration will now be as given here.t is supported by the NMEICT, MHRD, Government of India.

More information on this Mission is available at this link.

|-
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"|
| style="background-color:#ffffff;border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The script is contributed by Snehlatha and Trupti Kini.

And this is Trupti Kini from IIT Bombay signing off. Thank you for joining.

|}

← Older revision		Revision as of 05:16, 7 August 2014
Line 4:		Line 4:

	'''Keywords: Python, DNA sequences as strings, Protein sequences as strings, '''		'''Keywords: Python, DNA sequences as strings, Protein sequences as strings, '''
−
−	~~'''Outline:- '''~~
−
−	*
−	**
−	~~***~~
−	**** Concatanation. (Adding two strings )
−	**** Replacing a character in a string.
−	**** Find the position of character in a string.
−	**** Extracting part of a string.

Python for Biologists/C2/Manipulating-Strings/English - Revision history

Trupti at 05:21, 7 August 2014

Trupti at 05:16, 7 August 2014

Trupti: Created page with ''''Title of script''': Manipulating strings '''Author: '''Snehalatha and Trupti '''Keywords: Python, DNA sequences as strings, Protein sequences as strings, ''' '''Outline:- '…'

@@ Line 4: / Line 4: @@
 '''Keywords: Python, DNA sequences as strings, Protein sequences as strings, '''
 {| style="border-spacing:0;"
-! <center>Visual Cue</center>
+| style="background-color:#ffffff;border:0.75pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| '''Visual Cue'''
-! <center>Narration</center>
+| style="background-color:#ffffff;border:0.75pt solid #000001;padding-top:0cm;padding-bottom:0cm;padding-left:0.191cm;padding-right:0.191cm;"| '''Narration'''
 |-