Sandhya.np14 at 16:49, 13 June 2019

2019-06-13T16:49:36Z

PoojaMoolya at 06:14, 13 June 2019

2019-06-13T06:14:56Z

PoojaMoolya: Created page with "{| border=1 | '''Time''' | '''Narration''' |- | 00:01 | Hello friends and welcome to the Spoken Tutorial on''' Additional Features of IPytho..."

2019-05-30T06:14:33Z

Created page with "{| border=1 | <center>'''Time'''</center> | <center>'''Narration'''</center> |- | 00:01 | Hello friends and welcome to the Spoken Tutorial on''' Additional Features of IPytho..."

New page

{| border=1
| <center>'''Time'''</center>
| <center>'''Narration'''</center>

|-
| 00:01
| Hello friends and welcome to the Spoken Tutorial on''' Additional Features of IPython'''.

|-
| 00:07
| At the end of this tutorial, you will be able to, Retrieve your''' IPython''' '''history'''.

|-
| 00:14
| View a part of the '''history'''.

|-
| 00:17
| Save a part of a '''history''' to a file.

|-
| 00:21
| Run a script from within''' IPython'''.

|-
| 00:25
| To record this tutorial, I am using '''Ubuntu Linux 14.04''' operating system

|-
| 00:32
| '''Python 3.4.3'''

'''IPython 5.1.0'''

|-
| 00:38
| To practice this tutorial, you should know how to

use Plots interactively and embellish a plot

|-
| 00:48
| If not, see the pre-requisite Python tutorials on this website.

|-
|00:54
| Let us now open the '''Terminal '''by pressing '''Ctrl+Alt+T '''keys simultaneously.

|-
| 01:01
| Now, type '''ipython3''' and press '''Enter'''.

|-
| 01:07
| Let us initialise the '''pylab package'''. Type '''percentage pylab '''and press''' Enter'''

|-
| 01:14
| To start plotting, type '''x is equal to linspace''' inside the '''brackets minus 2pi comma 2pi comma 100 ''' and press''' Enter.'''

|-
| 01:31
| Next type '''plot''' inside the '''brackets x comma xsin(x) '''and press''' Enter'''

|-
| 01:42
| We got an error saying "'''xsin''' is not defined".

This is because '''xsin(x) '''is actually '''x '''multiplied by '''sin(x)'''

|-
| 01:54
| Here, multiplication sign is missing. So let us now type

'''plot''' inside the '''brackets x comma x multiplied by sin(x)''' and press Enter'''.'''

|-
|02:13
| Next let us add '''title''' and the '''labels''' for both '''x''' and '''y axes'''.

|-
| 02:19
| Type '''xlabel''' inside the '''brackets''' inside '''inverted commas''' inside '''dollar sign x ''' and press '''Enter.'''

|-
| 02:31
| '''ylabel''' inside the '''brackets''' inside '''inverted commas''' inside '''dollar sign f(x) '''

|-
| 02:43
| '''Title''' inside the '''brackets''' inside ''''inverted commas''' inside '''dollar sign x and xsin(x) '''

|-
| 02:57
| We can now see the labelled '''plot'''.

|-
|03:01
| The '''history''' of typed '''commands''' can be retrieved by the ''' percentage history command'''.

|-
| 03:07
| Type '''percentage history''' and press''' Enter'''.

|-
| 03:13
| '''percentage history '''itself is a '''command''' and is displayed as the most recent '''command'''.

|-
| 03:20
| Whatever we executed in the '''terminal''' is stored as history.

|-
| 03:25
| If we want to see what was the fifth '''command''', pass 5 as an '''argument''' to''' percentage history command'''.

|-
| 03:33
| Type '''percentage history space 5 '''and press''' Enter'''.

This displays the fifth '''command''' which we typed.

|-
| 03:43
| Now pause the video here, and try out the following exercise and resume the video.

|-
| 03:49
| Find out how to list the recent '''commands''' between 5 and 10.

|-
| 03:55
| Switch back to '''terminal'''.

|-
| 03:58
| Let us look at the solution.

|-
| 04:00
| Type '''clf()''' and Press Enter.

Type '''percentage history question mark '''

|-
| 04:08
| Read through the information of''' percentage history command'''.

|-
| 04:13
| We can see, '''percentage history hyphen n 4 hyphen 6''' displays the '''commands''' from 4 to 6.

|-
| 04:24
| Here '''hyphen n '''is an optional '''argument''' which prints the line numbers.

Type '''q '''to quit the documentation

|-
| 04:37
| Now type '''percentage history space 5 hyphen 10''' and press''' Enter.'''

|-
| 04:46
| To save the '''history''', we use the '''percentage save command'''.

|-
| 04:51
| Before we do that, let us first look at the '''history''' and identify which lines of code we require.

|-
| 04:58
| Type''' percentage history''' and press''' Enter'''.

|-
| 05:03
| The second '''command''' is '''linspace'''.

But the third '''command''' is a '''command''' that gave us an error.

|-
| 05:10
| Hence we do not need it.

|-
| 05:13
| The '''commands''' from fourth to seventh are required.

|-
| 05:16
| So we need the second '''command''' and then the fourth to seventh '''commands''' for our program.

|-
| 05:22
| Let us save it in the present working directory. Hence the syntax will be

'''percentage save space plot underscore script.py space 2 space 4 hyphen 7''' and press''' Enter'''

|-
| 05:47
| The first '''argument''' in '''percentage save command''' is the name of the file in which the commands are saved.

|-
| 05:56
| The second '''argument''' gives the numbers of the commands that are being saved separated by spaces.

|-
| 06:04
| Let us now open the file '''plot underscore script.py''' and see the contents.

|-
| 06:13
| Let us learn how to run the file as a '''python script.'''

We use the '''command percentage run''' to do this.

|-
| 06:22
| Type '''percentage run space hyphen i space plot underscore script.py''' and press''' Enter.'''

|-
| 06:38
|
Here, '''hyphen i''' parameter runs the code written in a text editor.

The code is run within the current '''ipython''' session.

|-
| 06:50
| It uses the '''variables''' defined interactively in the '''ipython''' session.

|-
| 06:56
| The script runs but we do not see the '''plot'''.

|-
| 07:01
| This is because when we are running a script, we are not in the interactive mode.

|-
| 07:07
| To view the '''plot''', type''' show()''' on your '''terminal''' and press '''Enter.'''

|-
| 07:15
| Pause the video here, and try out the following exercise and resume.

|-
| 07:21
| Use '''percentage history''' and''' percentage save''' to create a script that has the function '''show()''' in it.

|-
| 07:30
| Run the '''script''' to produce the '''plot''' and display the same.

|-
| 07:35
| Let us look at the solution.

We first look at the '''history''' using''' the percentage history hyphen n''' command.

|-
| 07:44
| Type '''percentage history space hyphen n''' and press''' Enter.'''

|-
| 07:54
| Let us clear the plot window

Type '''clf()''' and press '''Enter'''

|-
| 08:01
| Now let us save the '''script''' using the '''command''' '''percentage save'''

|-
| 08:07
| We need lines 2, then 4 to 7 and 16

|-
| 08:20
| Type '''percentage save space show underscore included.py space 2 space 4 hyphen 7 space 16''' and press''' Enter'''

|-
| 08:41
| To run the script type

'''percentage run space hyphen i space show underscore included.py'''

And press''' Enter'''

|-
| 08:57
| We get the desired plot.

|-
| 09:01
| Go to the previous '''command'''.
'Modify it by removing ‘'''hyphen i’''' in the '''command''' to, '''percentage run space show included.py''' and Press '''Enter'''

|-
| 09:16
| We see that it raises a '''NameError''' saying that the name '''linspace''' is not defined.

This happens because we did not run the script interactively.

|-
| 09:30
| This brings us to the end of this tutorial. In this tutorial,we have learnt to,

Retrieve the '''history''' using '''percentage history command.'''

|-
| 09:41
| View only a part of '''history''' by passing argument to''' percentage history command.'''

|-
| 09:48
| Save the required lines of code in required order using '''percentage save command.'''

|-
| 09:55
| Use ''''percentage run space hyphen i'''' command to run a saved script.

|-
| 10:04
| Here are some self assessment questions

|-
| 10:08
| How do you save the command lines 2 3 4 5 7 9 10 and 11?

|-
| 10:17
| '''percentage save filename 2-5 7 9 hyphen 11'''

|-
| 10:25
| '''percentage save filename 2 hyphen 11'''

|-
| 10:30
| '''percentage save filename'''

'''percentage save 2 hyphen 5 7 9 hyphen 11'''

|-
| 10:40
| Which is the command to run the script?

'''Percentage execute the script name'''

|-
| 10:46
| '''percentage run hyphen i script name '''

'''percentage run script name '''

|-
| 10:53
| '''percentage execute hyphen i script name'''

|-
| 10:58
| And the solutions are,

To save the commands 2 3 4 5 7 9 10 11, we issue the '''command percentage save filename 2 hyphen 5 space 7 space 9 hyphen 11'''

|-
| 11:18
| To run the script we use '''percentage run space hyphen i space scriptname'''

|-
| 11:27
| Please post your timed queries in this forum.

|-
| 11:32
| Please post your general queries on Python in this forum.

|-
| 11:37
| The FOSSEE team coordinates the TBC project.

|-
| 11:41
| Spoken Tutorial Project is funded by NMEICT, MHRD, Govt. of India.

For more details, visit this website.

|-
|11:52
| This is Usha from IIT Bombay (or FOSSEE, if you wish) signing off.

|}

@@ Line 344: / Line 344: @@
 | '''percentage save filename'''
-'''percentage save 2 hyphen 5 7 9 hyphen 11'''
+'''percentage save 2 hyphen 5 7 9 10 and 11'''
 |-

Python-3.4.3/C2/Additional-features-of-IPython/English-timed - Revision history

Sandhya.np14 at 16:49, 13 June 2019

PoojaMoolya at 06:14, 13 June 2019

PoojaMoolya: Created page with "{| border=1 | '''Time''' | '''Narration''' |- | 00:01 | Hello friends and welcome to the Spoken Tutorial on''' Additional Features of IPytho..."