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

PoojaMoolya at 12:27, 20 February 2017

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Gaurav at 09:56, 3 September 2014

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Gaurav at 07:00, 10 July 2014

2014-07-10T07:00:06Z

Gaurav at 06:59, 10 July 2014

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Krupali at 06:41, 30 October 2013

2013-10-30T06:41:32Z

Krupali at 05:22, 30 October 2013

2013-10-30T05:22:16Z

Kavita salve at 05:16, 28 October 2013

2013-10-28T05:16:56Z

Sneha at 07:00, 8 March 2013

2013-03-08T07:00:41Z

Minal: Created page with '{| border=1 !Timing !Narration |- | 0:00 | Hello friends and welcome to the tutorial on "Additional Features of IPython". |- | 0:06 | At the end of this tutorial, you will be ab…'

2013-01-02T10:50:52Z

Created page with '{| border=1 !Timing !Narration |- | 0:00 | Hello friends and welcome to the tutorial on "Additional Features of IPython". |- | 0:06 | At the end of this tutorial, you will be ab…'

New page

{| border=1
!Timing
!Narration
|-
| 0:00
| Hello friends and welcome to the tutorial on "Additional Features of IPython".

|-
| 0:06
| At the end of this tutorial, you will be able to,

# Retrieve your ipython history.
# View a part of the history.
# Save a part of your history to a file.
# Run a script from within ipython.

|-
| 0:19
| Before beginning this tutorial,we would suggest you to complete the tutorial on "Embellishing a plot".

|-
|0:24
|Let us start ipython with pylab loaded, by typing ipython hyphen pylab on the terminal.

|-
| 0:33
| We shall first make a plot and then view the history and save it, for that we can type x = linspace within brackets minus 2 into pi comma 2 into pi comma 100

plot within bracket x comma xsinx within bracket x and hit enter

|-
|1:00
| We got an error saying "xsinx is not defined".

|-
|1:04
|This is because xsin(x) is actually x star sin(x), for that we have type in the terminal
plot within bracket x comma x star sin(x)

plot within bracket x, sin(x)
xlabel within bracket in double quotes x
ylabel within bracket in double quotes dollar sign f(x) dollar sign
title within bracket in double quotes x and xsin(x)
title within bracket in double quotes dollar sign x and xsin(x) dollar sign

|-
| 2:15
| We now have the plot.

|-
|2:18
|Let us look at the commands that we have typed in.

|-
|2:21
| The history can be retrieved by using =modulo hist= command.

|-
|2:28
| Type modulo that is percentage sign hist in your terminal and hit enter

|-
| 2:37
| As you can see, it displays a list of recent commands that we typed.

|-
|2:41
| Every command has a number in front, to specify in which order and when it was typed.

|-
|2:48
|Please note that there is a percentage sign before the hist command.

|-
|2:52
| This implies that percentage hist is a command that is specific to IPython only and not to any other version of python.

|-
|3:00
| These type of commands are called as magic commands.

|-
|3:04
|Also note that, the =%hist= itself is a command and is displayed as the most recent command.

|-
|3:15
| We should note that anything we type in is stored as history, irrespective of whether it is command or an error or IPython magic command.

|-
| 3:27
| If we want only the recent 5 commands to be displayed, we pass the number as an argument to =percentage hist= command.

|-
|3:35
| Hence percentage hist 5 displays the recent 5 commands, inclusive of the =percentage hist= command.

|-
|3:46
|The default number is 40.

|-
|3:48
|So to try this we can type in the terminal percentage hist space 5 and hit enter.

|-
| 3:58
| Pause the video here, try out the following exercise and resume the video.

|-
|4:02
|Read through the documentation of %hist and find out how to list all the commands between 5 and 10.

|-
| 4:11
| As we can see from =percentage hist= documentation,percentage hist 5 10 displays the commands from 5 to 10

|-
|4:22
|Now that we have the history, we will try it on the command prompt so type percentage hist 5 space 10 and hit enter.

|-
|4:35
| we would like to save the required line of code from history.

|-
|4:39
| This is possible by using the =percentage save= command.

|-
|4:47
| Before we do that, let us first look at history and identify what lines of code we require. So type percentage hist and hit enter.

|-
| 4:58
| The first command is linspace.

|-
| 5:00
| But second command is a command that gave us an error.

|-
|5:06
| Hence we do not need second command.

|-
|5:09
| The commands from third to sixth are required.

|-
|5:12
|The seventh command although is correct, we do not need it since we are setting the title correctly in the eighth command.

|-
| 5:20
| So we need first third to sixth and the eighth command for our program.

|-
|5:26
| Hence you can type in the syntax of percentage save slash home slash fossee slash plot underscore script dot py space 1 space 3 hyphen 6 space 8

|-
| 5:46
| The command saves the first line of code and then third to sixth followed by the eighth lines of code into the specified file.

|-
|5:55
|The first argument to percentage save is the path of file to save the commands and the arguments there after are the commands to be saved in the given order.

|-
| 6:08
| Pause the video here, try out the following exercise and resume the video.

|-
|6:11
|Change the label on y-axis to "y" and save the lines of code accordingly.

|-
| 6:17
| we use the command =ylabel= on interpreter

|-
|6:21
|ylabel within brackets in double quotes y and hit enter

|-
| 6:29
| and then you can do percentage save command

|-
|6:36
| That is you can type percentage save slash home slash fossee slash example underscore plot dot py space 1 space 3 hyphen 6 space 10

|-
|6:51
| Now that we have the required lines of code in a file, let us learn how to run the file as a python script.

|-
|6:58
|We use the IPython magic command =percentage run= to do this.

|-
|7:03
|Type percentage run spce hyphen i space slash home slash fossee slash plot underscore script dot py

|-
|7:18
| The script runs but we do not see the plot. This happens because when we are running a script, we are not in the interactive mode anymore.

|-
|7:27
|Hence to view the plot type <tt>show then brackets</tt> on your terminal

|-
| 7:38
| Pause the video here, try out the following exercise and resume the video.

|-
|7:41
|Use percentage hist and percentage save and create a script that has the function show() in it.

|-
|7:49
| Run the script to produce the plot and display the same.

|-
|7:56
|So you can type percentage hist space 20 on the terminal

|-
|8:06
|We first look at the history using this command

|-
| 8:09
| Then save the script using the command percentage save space slash home slash fossee slash show underscore included dot py space 1 space 3 hyphen 6 space 8 space 14 space 17

|-
|8:37
| then on the next line you can type
percentage run hyphen i slash home slash fossee slash show underscore included dot py, then type show function to gt the plot.

|-
| 9:03
| We get the desired plot now.

|-
|9:07
|The reason for including a hyphen i after run is to tell the interpreter that if any name is not found in script, search for it in the interpreter.

|-
|9:17
|Hence all these sin, plot, pi and show which are not available in script, are taken from the interpreter and used to run the script.

|-
| 9:32
| Pause the video here, try out the following exercise and resume the video.

|-
|9:36
|Run the script without using the hyphen i option.

|-
|9:42
|Do you find any difference?

|-
|9:47
|So you can type percentage run slash home slash fossee slash show underscore included dot py

|-
| 10:04
| We see that it raises NameError saying that the name linspace is not found.

|-
|10:12
| This brings us to the end of this tutorial.

|-
|10:14
|In this tutorial,we have learnt to, Retrieve the history using =percentage hist= command.

|-
|10:21
|then View only a part of history by passing an argument to 'percentage hist' command.

|-
|10:25
|then Save the required lines of code in required order using 'percentage save' command.

|-
|10:30
|then Use 'percentage run hyphen i' command to run the saved script.

|-
| 10;39
| Here are some self assessment questions for you to solve

|-
|10:43
|5. How do you retrieve the recent 5 commands

|-
|10:46
| And there are four options <tt>percentage hist</tt>, <tt>percentage hist minus 5</tt>, <tt>percentage hist 5</tt>, <tt>percentage hist 5 to 10</tt>

|-
|10:57
|How do you save the lines 2 3 4 5 7 9 10 11 and the options are <tt>percentage save filepath 2 hyphen 5 7 9 hyphen 11</tt>, <tt>percentage save filepath 2 hyphen 11</tt>, <tt>percentage save filepath</tt>
<tt>percentage save 2 hyphen 5 7 9 10 11</tt>

|-
|11:24
|And the final question is What will the command <tt>percentage hist 5 10</tt> display.

|-
|11:30
| The recently typed commands from 5 to 10 inclusive of the history command

|-
|11:34
|The recently typed commands from 5 to 10 excluding the history command

|-
| 11:38
| So now the answers,

|-
|11:41
| In order to retrieve the recently typed 5 commands,we say <tt>percentage hist 5</tt>.

|-
|11:49
|So second question answer is <tt>percentage save filepath 2 hyphen 5 space 7 space 9 hyphen 11</tt> is the correct option to the specified lines of codes.

|-
|12:02
| Then third answer is<tt>percentage hist 5 space 10</tt> will display the recently typed commands from 5 to 10 inclusive of the history command.

|-
| 12:14
| This brings us to the end of this tutorial

|-
| 12:17
|So we Hope you have enjoyed and found it useful.Thank you.

@@ Line 9: / Line 9: @@
 | 00:06
 | At the end of this tutorial, you will be able to,
 Retrieve your ipython history.
-# Retrieve your ipython history.
+View a part of the history.
-# View a part of the history.
+Save a part of your history to a file.
-# Save a part of your history to a file.
+Run a script from within ipython.
-# Run a script from within ipython.
 |-
@@ Line 26: / Line 25: @@
 |00:33
 | We shall first make a plot and then view the history and save it, for that we can type x = linspace within brackets minus 2 into pi comma 2 into pi comma 100
 plot within bracket x comma  xsinx cosx  and hit enter
 |-
@@ Line 38: / Line 35: @@
 |This is because xsin(x) is actually x star sin(x), for that we have to type on the terminal
 plot within bracket x comma x star sin(x)
 plot x, sin(x)
 xlabel within bracket in double quotes x then
@@ Line 44: / Line 40: @@
 title within bracket in double quotes x and xsin(x) then again
 title within bracket in double quotes dollar sign x and xsin(x) and again a dollar sign
 |-
@@ Line 240: / Line 235: @@
 |-
 |08:37
-| then on the next line you can type
+| then on the next line you can type percentage run hyphen i slash home slash fossee slash show underscore included dot py, then type show, show function to get the plot.
 percentage run hyphen i slash home slash fossee slash show underscore included dot py, then type show, show function to get the plot.
 |-

← Older revision		Revision as of 05:16, 28 October 2013
Line 29:		Line 29:
	\| We shall first make a plot and then view the history and save it, for that we can type x = linspace within brackets minus 2 into pi comma 2 into pi comma 100		\| We shall first make a plot and then view the history and save it, for that we can type x = linspace within brackets minus 2 into pi comma 2 into pi comma 100

−	plot within bracket x comma ~~xsin~~ cosx and hit enter	+	plot within bracket x comma xsinx cosx and hit enter

@@ Line 296: / Line 296: @@
 |-
-| 10;39
+| 10:39
 | Here are some self assessment questions for you to solve

@@ Line 294: / Line 294: @@
 |10:30
 |then Use 'percentage run hyphen i' command to run the saved script.
 |-

@@ Line 86: / Line 86: @@
 |-
 |3:04
-|Also note that, the =%hist= itself is a command and is displayed as the most recent command.
+|Also note that, the %hist itself is a command and is displayed as the most recent command.
 |-
@@ Line 94: / Line 94: @@
 |-
 | 3:27
-| If we want only the recent 5 commands to be displayed, we pass the number as an argument to =percentage hist= command.
+| If we want only the recent 5 commands to be displayed, we pass the number as an argument to percentage hist command.
 |-
 |3:35
-| Hence percentage hist 5 displays the recent 5 commands, inclusive of the =percentage hist= command.
+| Hence percentage hist 5 displays the recent 5 commands, inclusive of the percentage hist command that we gave.
 |-
@@ Line 118: / Line 118: @@
 |-
 | 4:11
-| As we can see from =percentage hist= documentation,percentage hist 5 10 displays the commands from 5 to 10
+| As we can see from percentage hist documentation,percentage hist 5 space 10 displays the commands from 5 to 10
 |-
 |4:22
-|Now that we have the history, we will try it on the command prompt so type percentage hist 5 space 10 and hit enter.
+|Now that we have the history, we will try it on the command prompt, so you can type percentage hist 5 space 10 and hit enter.
 |-
@@ Line 130: / Line 130: @@
 |-
 |4:39
-| This is possible by using the =percentage save= command.
+| So, This is possible by using the percentage save command.
 |-
 |4:47
-| Before we do that, let us first look at history and identify what lines of code we require. So type percentage hist and hit enter.
+| So, Before we do that, let us first look at history and identify what lines of code we require. So type percentage hist on the terminal and hit enter.
 |-
@@ Line 166: / Line 166: @@
 |-
 |  5:46
-| The command saves the first line of code and then third to sixth followed by the eighth lines of code into the specified file.
+| This command saves the first line of code and then third to sixth followed by the eighth lines of code into the specified file.
 |-
 |5:55
-|The first argument to percentage save is the path of file to save the commands and the arguments there after are the commands to be saved in the given order.
+|The first argument to percentage save is the path of file and save the commands and the arguments there after are the commands to be saved in the given order.
 |-
@@ Line 182: / Line 182: @@
 |-
 | 6:17
-| we use the command =ylabel= on interpreter
+| we use the command ylabel on interpreter
 |-
 |6:21
-|ylabel within brackets in double quotes y and hit enter
+|So you can type, ylabel within brackets in double quotes y and hit enter
 |-
@@ Line 194: / Line 194: @@
 |-
 |6:36
-| That is you can type percentage save slash home slash fossee slash example underscore plot dot py space 1 space 3 hyphen 6 space 10
+| That is you can type percentage save then slash home slash fossee slash example underscore plot dot py then 1 space 3 hyphen 6 space 10
 |-
@@ Line 202: / Line 202: @@
 |-
 |6:58
-|We use the IPython magic command =percentage run= to do this.
+|We use the IPython magic command percentage run to do this.
 |-
 |7:03
-|Type percentage run space hyphen i space slash home slash fossee slash plot underscore script dot py
+|So Type percentage run space hyphen i space slash home slash fossee slash plot underscore script dot py
 |-
@@ Line 214: / Line 214: @@
 |-
 |7:27
-|Hence to view the plot type show then brackets on your terminal
+|Hence to view the plot, you have to type, show and then brackets on your terminal
 |-
 | 7:38
-|  So now Pause the video here, try out the following exercise and resume the video.
+|  So now Pause the video here, try out the following exercise
 |-
@@ Line 238: / Line 238: @@
 |-
 | 8:09
-| Then save the script using the command percentage save space  slash home slash fossee slash show underscore included dot py space  1  space 3 hyphen 6  space 8 , 14  and 17
+| Then save the script using the command percentage save  slash home slash fossee slash show underscore included dot py space  1  space 3 hyphen 6  then space 8 then 14  and 17
 |-
 |8:37
 | then on the next line you can type
-percentage run hyphen i slash home slash fossee slash show underscore included dot py, then type show function to get the plot.
+percentage run hyphen i slash home slash fossee slash show underscore included dot py, then type show, show function to get the plot.
 |-
@@ Line 259: / Line 259: @@
 |-
 | 9:32
-| Pause the video here, try out the following exercise and resume the video.
+| So now, Pause the video here, try out the following exercise and resume the video.
 |-
@@ Line 267: / Line 267: @@
 |-
 |9:42
-|Do you find any difference?
+|So Do you find any difference?
 |-
@@ Line 283: / Line 283: @@
 |-
 |10:14
-|In this tutorial,we have learnt to, Retrieve the history using =percentage hist= command.
+|In this tutorial,we have learnt to, Retrieve the history using percentage hist command.
 |-
@@ Line 312: / Line 312: @@
 |-
 |10:57
-|How do you save the lines 2 3 4 5 7 9 10 11 and the options are percentage save filepath 2 hyphen 5 7 9 hyphen 11,percentage save filepath 2 hyphen 11,percentage save filepath  percentage save 2 hyphen 5 7 9 10 11
+|And in second, How do you save the lines 2 3 4 5 7 9 10 11 and the options are percentage save filepath 2 hyphen 5 7 9 hyphen 11,then percentage save filepath 2 hyphen 11,then percentage save filepath  then after that percentage save 2 hyphen 5 7 9 10 11
 |-
 |11:24
-|And the final question is What will the command percentage hist 5 10 display.
+|And the final question is What will the command percentage hist 5 space 10 display.
 |-
@@ Line 332: / Line 332: @@
 |-
 |11:41
-| In order to retrieve the recently typed 5 commands,we say percentage hist 5 for the first question.
+| In order to retrieve the recently typed 5 commands,we have to say percentage hist 5 for the first question.
 |-
@@ Line 340: / Line 340: @@
 |-
 |12:02
-| Then third answer is percentage hist 5 space 10 will display the recently typed commands from 5 to 10 inclusive of the history command.
+|And Then third answer is percentage hist 5 space 10 will display the recently typed commands from 5 to 10 inclusive of the history command.
 |-

@@ Line 23: / Line 23: @@
 |-
 |0:24
-|Let us start ipython with pylab loaded, by typing ipython  hyphen pylab on the terminal.
+|Let us start ipython with pylab loaded, by typing ipython space hyphen pylab on the terminal.
 |-
@@ Line 38: / Line 38: @@
 |-
 |1:04
-|This is because xsin(x) is actually x star sin(x), for that we have type in the terminal
+|This is because xsin(x) is actually x star sin(x), for that we have to type on the terminal
 plot within bracket x comma x star sin(x)
 plot x, sin(x)
-xlabel within bracket in double quotes x
+xlabel within bracket in double quotes x then
-ylabel within bracket in double quotes  dollar sign f(x) dollar sign
+ylabel within bracket in double quotes  dollar sign f(x) again a dollar sign then
-title within bracket in double quotes x and xsin(x)
+title within bracket in double quotes x and xsin(x) then again
-title within bracket in double quotes dollar sign x and xsin(x) dollar sign
+title within bracket in double quotes dollar sign x and xsin(x) and again a dollar sign
@@ Line 58: / Line 58: @@
 |-
 |2:21
-| The history can be retrieved by using =modulo hist= command.
+| The history can be retrieved by using modulo hist command.
 |-
 |2:28
-| Type  modulo that is percentage sign hist in your terminal and hit enter
+| Type  modulo that is percentage sign then hist and hit enter
 |-
@@ Line 74: / Line 74: @@
 |-
 |2:48
-|Please note that there is a percentage sign before the hist command.
+|So, Please note that there is a percentage sign before the hist command.
 |-

@@ Line 29: / Line 29: @@
 | We shall first make a plot and then view the history and save it, for that we can type x = linspace within brackets minus 2 into pi comma 2 into pi comma 100
-plot within bracket x comma  xsinx within bracket x and hit enter
+plot within bracket x comma  xsin cosx  and hit enter
@@ Line 41: / Line 41: @@
 plot within bracket x comma x star sin(x)
-plot within bracket x, sin(x)
+plot x, sin(x)
 xlabel within bracket in double quotes x
 ylabel within bracket in double quotes  dollar sign f(x) dollar sign
@@ Line 82: / Line 82: @@
 |-
 |3:00
-| These type of commands are called as magic commands.
+| These other type of commands are called as magic commands.
 |-
@@ Line 206: / Line 206: @@
 |-
 |7:03
-|Type percentage run spce hyphen i space slash home slash fossee slash plot underscore script dot py
+|Type percentage run space hyphen i space slash home slash fossee slash plot underscore script dot py
 |-
@@ Line 214: / Line 214: @@
 |-
 |7:27
-|Hence to view the plot type <tt>show then brackets</tt> on your terminal
+|Hence to view the plot type show then brackets on your terminal
 |-
 | 7:38
-| Pause the video here, try out the following exercise and resume the video.
+|  So now Pause the video here, try out the following exercise and resume the video.
 |-
@@ Line 226: / Line 226: @@
 |-
 |7:49
-| Run the script to produce the plot and display the same.
+| Run the script to produce the plot and display the name.
 |-
@@ Line 234: / Line 234: @@
 |-
 |8:06
-|We first look at the history using this command
+|We first look at the history using this command only,
 |-
 | 8:09
-| Then save the script using the command percentage save space  slash home slash fossee slash show underscore included dot py space  1  space 3 hyphen 6  space 8  space 14 space 17
+| Then save the script using the command percentage save space  slash home slash fossee slash show underscore included dot py space  1  space 3 hyphen 6  space 8 , 14  and 17
 |-
 |8:37
 | then on the next line you can type
-percentage run hyphen i slash home slash fossee slash show underscore included dot py, then type show function to gt the plot.
+percentage run hyphen i slash home slash fossee slash show underscore included dot py, then type show function to get the plot.
 |-
@@ Line 271: / Line 271: @@
 |-
 |9:47
-|So you can type percentage run slash home slash fossee slash show underscore included dot py
+|So you can type percentage run slash home slash fossee slash included hypen  included dot py
 |-
 |  10:04
-| We see that it raises NameError saying that the name linspace is not found.
+| We see that it raises Name Error saying that the name linspace is not found.
 |-
@@ Line 309: / Line 309: @@
 |-
 |10:46
-| And there are four options <tt>percentage hist</tt>,  <tt>percentage hist  minus 5</tt>, <tt>percentage hist 5</tt>,  <tt>percentage hist 5 to 10</tt>
+| And there are four options percentage hist,percentage hist  minus 5,percentage hist 5,percentage hist 5 to 10
-−
 |-
 |10:57
-|How do you save the lines 2 3 4 5 7 9 10 11 and the options are <tt>percentage save filepath 2 hyphen 5 7 9 hyphen 11</tt>,  <tt>percentage save filepath 2 hyphen 11</tt>, <tt>percentage save filepath</tt>
+|How do you save the lines 2 3 4 5 7 9 10 11 and the options are percentage save filepath 2 hyphen 5 7 9 hyphen 11,percentage save filepath 2 hyphen 11,percentage save filepath  percentage save 2 hyphen 5 7 9 10 11
-  <tt>percentage save 2 hyphen 5 7 9 10 11</tt>
 |-
 |11:24
-|And the final question is What will the command <tt>percentage hist 5 10</tt> display.
+|And the final question is What will the command percentage hist 5 10 display.
 |-
@@ Line 334: / Line 332: @@
 |-
 |11:41
-| In order to retrieve the recently typed 5 commands,we say <tt>percentage hist 5</tt>.
+| In order to retrieve the recently typed 5 commands,we say percentage hist 5 for the first question.
 |-
 |11:49
-|So second question answer is <tt>percentage save filepath 2 hyphen 5 space  7  space 9 hyphen 11</tt> is the correct option to the specified lines of codes.
+|So second question answer is percentage save file path 2 hyphen 5 space  7  space 9 hyphen 11 is the correct option to the specified lines of codes.
 |-
 |12:02
-| Then third answer is<tt>percentage hist 5 space 10</tt> will display the recently typed commands from 5 to 10 inclusive of the history command.
+| Then third answer is percentage hist 5 space 10 will display the recently typed commands from 5 to 10 inclusive of the history command.
 |-