Python Tutorial - 13. Reading/Writing Files 

Do you want to learn python from me with a lot of interactive quizzes, and exercises? Here is my project-based python learning course: codebasics.io/courses/python-for-beginner-and-intermediate-learners

8 years ago and still reliable is pretty awesome

Here is the link of exercise along with the solution, please work on it as it will make your learning solid: github.com/codebasics/py/blob/master/Basics/Exercise/13_read_write_files/read_write_file_exercise.md

The best tutorial I've ever seen

ur vids r great to watch...ty fr such great wrk

Thanks for this great video, you helped me for my assignment

Thank you so much. you are the best teacher I've even seen. Good luck.

The easiest one on youtube! Loved it..

thanks for a clear demonstration !!

Very good, thank you! The background music was a nice addition too :)

Thanks from Brasil!

thank you ...finally i got it

Good job

Then that has a special meaning and it will not work 👌👌👌👌 What an explanation

thank you from Russia !

Very Nice

Thank you from India, MAHARASHTRA

You really good to explain thank you

Hi Sir, Love your content as always...great video.. I have few questions regarding the example you have taken in this video: If expand the conversation in the example taken Using text file handling and string manipulation in python 1) How can I find the number of unique speaker and list of all speaker present in file and also want separate file for each speaker. 2) I want to find the list of all unique words spoken by each unique speaker in new line and want to save these words in respective speaker's file . 3) how to remove all punctuations. If I will get the answer it will be great help. Thanks in advance....

Great explanation. Would you be able to create a tutorial on reading values in a text file using splitlines, previous_lines nested in a for loop. Basically how to take field name & respective value from a text file and output them into a pandas dataframe.

Sir can u explain why u have used Double slash in path here but only single slash for path when we were dealing with modules

Thanks a lot man for helping us, and i wish that allah help you also.

Hi sir, you're tutorial is very educating, do you know how to delete a letter in a text file?

Thank you.

Great

Thank you Sir. There is a procedural bug. The previous tutorial should have come after this one. Kindly adjust the playlist.

solution: def Countnum(num): k = open("C:\\input.txt") number = k.readlines() number = [x.strip() for x in number] count =0 for i in number: if i.__contains__(str(num)): count = count +1 print(count)

Sir I love you

Great explain txt extension sy xls m change kr skty hai??

must watch

Can you please share solution for sample exercise? Thanks.

Hi, in the exercise section solution to 1st problem linked to wrong link (when you press it open solution for problem 2)

How to read a text file which are content in 2D array and find out the some value from that array. For example. Name and phone number. I want to search certain name and it's corresponding phone number

Hi, I cannot perform this action using a macbook/apple computer. Are there additional instructions for Mac users?

for exercise 1 and 2 you put the same solution please change that one

Hello sir, logic of 2nd question is :- for x in file: word = x.split() calc = int(word[0][0])+int(word[0][2]) print("sum is", calc) and it is working and fine buts ir i want another soln for this, shall you provide that?

i have created an python GUI application where Entry widget, which takes user input to create ,>>new folders>> but images should get saved in that particular file which user have created .

do that mention paid course of code basic is having same videos. or extra lectures are been provide in that?Any one can answer

Sir.. solution of problem 1 is missing can you please check and confirm in exercise section

why you have written "str" in print(str(tokens))?

I have doubt in the solution given for stocks exercise In the last line that is line#12 of solution, how f and variables has used. Can someone give more insights on this please. any link or reference would be helpful --> out.write(f"{stock},{pe},{pb} ")

hi , great video. But I have one doubt. I didn't see any ' ' in the last solution. you just shuffled the code which will display the word count first followed by the line. what if we want to display the line first followed by word count.

first: f.open, then f_out.open but while closing f.close and f_out.close - shouldnt it be "f_out.close then f.close" ?

what mean for line "in" I didn't understand why we use "in"?

solution 2: f=open("C:\\Users\\salina\\Desktop\\mypy\\input.txt","r") f_out=open("C:\\Users\\salina\\Desktop\\mypy\\input_1.txt","w") for line in f: cl=line.split(",") # changes the file contents(string) to list ,as two numbers are separated with comma so we are using comma total="The sum is : "+str(int(cl[0])+int(cl[1]))+" | "+line+" " f_out.write(total)

Hi, Pls help, How to read a file and get desired output . eg : File have some content "abc;xyz|,:1;tug,jd;98d;dea;wes;de5;2018;df" want result like :- "; separated 4th field"

tanks you from iraq

in the problem. "w" method is used why the text is not over written? pls explain

Can you give the solution for both the questions. I tried but I didn't got the logic def countnum(f, x): count = 0 for line in f: if line == x: count = count + 1 else: print("Number not found") return count x = int(input("Enter no.")) f = open("C:\\Users\\Win10\\Desktop\\funny.txt", "r") countnum(f, x,)

i am unable to understand why i am not getting the lines in the console although the file has lines

I’m a new student and need help to do this project: I have a port scanner script it works properly, it works in Pycharm using python3.9. I have to make a file and I did make call (Example.txt) On this file, I have to do this: 3. If the Ports is open, it should create a file and add an entry for port number 4. In case of any exception for instance “host is not available”, “host name could not be resolved” or due to any other error, you need to write that exception into the same file. I’m not asking for you to do the project for me, I'm only asking ware I need to work or used in my script to accomplish this because it is my first time doing this and working with python too, and I have been struggling with this part one very bad. I can even send you the code, so you can look and only tell me what I’m doing bad, is not working.

Solution 2: # Read values from the file with open('c:\\xampp\\exersize_wp.txt', 'r') as file: lines = file.readlines() print(lines) # Process each line output = [] for line in lines: # Extract the numbers from the line numbers = line.strip().split(',') num1 = int(numbers[0]) print(num1) num2 = int(numbers[1]) print(num2) # Calculate the sum total = num1 + num2 # Create the output string output.append(f'sum: {total} | {num1},{num2}') print(output) # Write the output to a file with open('c:\\xampp\\output_wp.txt', 'w') as file: file.write(' '.join(output))

Sir, I have one python app but your said program not execute in python app

Can you please give me the code of first question of the exercise.

Why the lines aren't overwritten in the file when we have used in for write mode-'w'...

For line in f: In above is line a keyword? If not how python knows by mentioning line that it has to go line by line Please anyone explain this

try 1.5x

you have to change this video at 15th rank and working with json after this,

thanks , got a new excuse, there are many schools in the path 🤣🤣

will everything will be same on macbook too?

जाय जाय

solution 1: f=open("C:\\Users\\salina\\Desktop\\mypy\\input.txt","r") occur=f.read() def countNum(n): c=0 for num in occur: if n in num: c=c+1 return c user=input("Enter a number: ") res=countNum(user) print(res) f.close()

No files are seen in c drive

The new line character at end of every line is property of file..... We need to remove that be rsplit()..... I think you should have told this method instead of appending wordcount at beginning.

OSError: [Errno 9] Bad file descriptor what's that?

griat toturiel, my techer tel me my werk is veri griat

Hello Sir, when I run this tutorial exercise 13 of stock.csv the error shows- price = float(tokens[1]) IndexError: list index out of range Pls giude

Sir 2nd practice question question is giving error as per your pdf solution.

What is the program you use for python programming?

Sir. which python book did you recommend for us

What background music is this?

can you please clear assignment Qn s

but, if i wants write from the keyboard into a file?

🤣😂 that "special thing" was awefull bye!

Solution 1: with open("C:\\codefile\\ownfile.txt", "r") as f: count=0 s=f.read() for line in s: if '9' in line: count= count+1 print(count)

sir, I have a doubt . plz tell how i contect with you

how far this is suitable for data analyst?

what to do if I havea mac

how to do it on Android

sir Yo have to Interchange 15 And 14 Video

+codebasics , very important advice for you, your content is good enough , but please don't include background music, that's kind a ruining your video, please take this advice seriously

Can you please make a tutorial on reading data stored in Unformatted Fortran Binary in Python and ploting them? Such files are often created in many Physics simulations like the extremely famous Gadget 2 Galaxy Evolution Simulation program.

I got permission denied error😥

with open ("question2 file path") as file1: with open("c:\\data\\funny3.txt","w") as file2: for lines in file1: lines.split() total = 0 for number in lines: if number.isalnum(): total += int(number) file2.write(str(total) + " | " + lines)

Hello. Please remove the background music and keep this video like the rest videos. Thanks indeed.

please its not working on my python27. please help

You love JavaScript, C++, PHP, but not python? XD

Request you to remove background music from video.

Sorry very poor sound

Background music is irritating

only one question, did u really thought the teacher frank joke was funny?

the music is annoying