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[no audio]

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Friends here, we are going to see how to copy a file into another file

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using Python, or simply copy the content of a file to another

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file. Let us assume that you have a file with some content

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in one location, in any location in your host,

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and whatever the data you have in that file that data

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I want to copy to some another file which is there in maybe

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same location or in different location.

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So this entire data I want to copy into this file. Assume

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that this is a source file and this is a destination file.

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So what you are doing guys? Simply the content which is there

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in your source file, that content you're going to write it

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into destination file.

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[no audio]

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Now first step what you have to do? Read the content of your

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source file, then whatever the data you read from your source

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file that data just write it into destination file.

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You know, if you want to read a data from any file in your

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Python you have to open that file in 'read' mode.

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And if you want to write any content to a file, then you

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have to open that file in 'write' mode.

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[no audio]

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'read' mode, you can able to read. 'write' mode, the content which

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you have in your hand that content you can write it into

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your file. That's it.

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So, let me open my editor just to write your Python Script.

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So what I am doing is simply I am going to save

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a Python Script name as

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[no audio]

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'source_to_destination.py'.

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So let me take

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first of all source file.

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You can take any file. As of now

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let me take my file as,

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let's say

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[no audio]

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Yeah, I have somewhere

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file. Let me take that.

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Suppose if you observe here

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I have a file called 'random'. In that

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I have some three lines.

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Let me take this file name first.

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[no audio]

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'random.txt', and I want

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to copy this content to some destination file.

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Let's say destination file name equals to 'newrandom.txt'.

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So first of all source file content you have to read,

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then whatever the data you are reading from source file

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that data we need to write into destination file.

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So what I am doing is, let me read the content

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from your source file first.

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So 'sfo=', open that source file in

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[no audio]

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'r' mode, then let me close your opened file.

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'sfo.close'. Let me save it and run it.

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[no audio]

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You're not getting anything. You opened your file in 'r' mode,

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but where is your data?

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See if you want to see the data,

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if you want to read the data from your source file, you know

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any variable, or let me say 'content=', your

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'sfo.read', read entire data as a string.

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You know you have different operations 'read', 'readline',

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'readlines'. So 'read' is a string, 'readline' is a string,

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'readlines' is a list.

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So I am going to read entire data as a string.

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Yes, you can read it.

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Now, let me print the data from your source file,

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whatever the data you are reading.

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[no audio]

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Yes, that's it. But this data I want to write it into

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my destination file.

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Nothing is there. It's very simple. If you want to write any

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data into a file what you have to do?

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Just open that file.

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Let me take this 'dfo= open(, and then

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destination file. Guys,

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our file name is already there in this variable. Then 'w'

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mode, then close that file.

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[no audio]

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But before going to close you have to write the content in

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your destination file.

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That's why, your 'dfo.write', already you have in

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your hand the content of your source file, that is with

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the variable called 'content'. Save it.

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Done. Let me run it. Done.

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Let me see that there is a 'newrandom' file in our location.

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[no audio]

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Let me search with 'n'.

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[no audio]

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Yeah, 'newrandom' is there. That's it.

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Right, and one more thing guys.

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Suppose this 'random.txt'

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I am copying into Desktop location.

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[no audio]

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Right. Fine.

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Now, if you observe your Python Script, this Python Script is there

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in suppose some different location. 'PythonScripts' directory

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you have your Python Script. And I'm running. See that. What

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you are getting? You're getting an error like, while opening

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your source file, you are getting an error like

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'No such file or directory'.

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The reason is your Python Script

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is there somewhere in 'PythonScripts' directory. Under Desktop

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you have a directory called 'PythonScripts', under that you

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have your Python Script. But your 'random.txt' is not

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there in the location where you have your Python Script. That

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is there in a different location called Desktop.

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So that's why whenever if you are trying to read or write,

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or whenever if you are working with any files try to provide

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complete path.

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Right. See, now

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what I am doing is, I am going to take complete path. Let's say

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[no audio]

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I need 'Desktop' path.

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[no audio]

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So guys, this is Windows,

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that's why whenever if you are giving a path, please provide

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'\\' in your path.

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[no audio]

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That's it.

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Now destination file location simply you are giving file name,

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but where you want to store exactly?

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If you don't provide any complete path, then the destination

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file will create in the location of where your Python Script

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is there. From which location you are running your Python

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Script, in that location only it will create. Now

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I want to create my Python,

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I mean my destination file in a different location called,

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suppose 'Downloads'.

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Right. So I want to create my destination file called 'Downloads'

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location. Let's say, copy that.

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[no audio]

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Provide the complete path, 'Downloads'.

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So be clear, whenever if you are working with files path,

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you have to provide '\\' in your file path in your

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Windows. Now, let me save it and before going to run

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observe that in Desktop

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you don't have any file called 'newrandom.txt'. Now,

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I am going to save it and run it.

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[no audio]

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Python Script has completed. Observe that

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There is a file created 'newrandom'.

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That's it.

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And as of now whatever the Python Script you have in your

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hand that is always going to work with fixed file, 'random',

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and then this is going to create a destination file called

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'newrandom.txt'. But I don't want to do in this way. Whenever

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if I run my Python Script it has to ask, "Enter your source

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file", "Enter the destination file", then that's good.

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So that's why what I am doing is, simply I am going to comment

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these two lines. Now instead of these two lines

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what I am writing is 'sfile=', I want to read

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the source file location while running your script. "Enter

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your source file location or source file".

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Now this script is like a dynamic script.

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It will work on any required files, right. "Enter your destination.

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file". That's it. Save it.

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Go to command line. Guys, in Sublime Text you can't provide input,

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that's why I'm going to run my Python Script from,

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[no audio]

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let's say we have our Python Script somewhere here.

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Our Python Script is source to destination, 's_d.py'.

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Now, I am going to run this.

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[no audio]

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So what I am doing is I want to copy our Python Script itself.

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Just assume that. I want to copy our Python Script itself

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[no audio]

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into some different location.

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[no audio]

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Let me copy complete path then.

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So in this location we have our Python Script, and

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let me provide '\\

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[no audio]

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PythonScripts\\s_d.py'. This file

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I need to copy, this file content

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I need to copy into some different location with same name

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or different name, that is your wish.

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Let's say I want to move this into suppose for 'Desktop' location.

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I want to copy this file into 'Desktop' location. In the 'Desktop'

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I want to provide same python script name,

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yes you can, or with some different name

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also you can provide. Just let's say I am taking same file

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name. Okay. 'Enter'. Done.

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Go to your 'Desktop', now search for 's_d'.

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Yes, it has been created. Open that file and see the content.

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[no audio]

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You got it. Right. So simply this is a Python Script just

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to copy source file content into destination file.

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Right. And guys you may get doubt, suppose if you go with Unix

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or Windows there are some commands like 'cp source

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[no audio]

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destination'. Single line code is enough,

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right. But why we are writing this many number of lines

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to copy your source content to destination file?

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[no audio]

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Right. So as of now, there is no much usage,

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but while going forward this concept is very, very helpful,

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very, very useful.

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So that's why just I have given introduction to copy one

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file content into another file content, right, here. And one

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more thing, last point.

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So by default guys, by default, if you don't open your file

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in read mode, I mean if you don't provide any mode while

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opening your file, by default that is the read mode. If you

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want to verify, let's say 'print()',

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your 'sfo.,

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what is the mode for that. Right.

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Now, what I am doing is, I am going to just run here itself.

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So I'm going to provide fixed filenames, observe the output.

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You're getting 'r'. 'r', that means if you open your file without

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mentioning any mode, by default that is the 'read' mode. That's it.

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[no audio]

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Right. Okay.

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Okay guys, thank you for watching this video. While going

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forward we will use this concept to work with some real time

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scenarios. Okay.

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[no audio]