CODEWITHSUNDEEP
python
Monchi Yui
Monchi Yui

Reputation: 11

How to modify specific text in a specific line in a text file

I'm trying to modify specific words in a specific line so that the user can input which line they want to modify and which text they want to search and replace.

Here's my code:

def mod_apartment():
    a = []
    b = []
    with open("Apartment_Details.txt", "r") as file:
        for line in file:
            a = line.split(",")
            print(a)
    with open("Apartment_Details.txt", "r") as file:
        print("Enter line: ", end="")
        lno = int(input())
        lines = line[lno]

Output:

['0001', '  Trifolis', '  900SQFT', '  A-A-A Impiana', '  Taman Garden', '  Kajang', '  Selangor', '  Furnished', '  Ready', '  Apartment', '  RM1700', '  Freehold', '  7 August 2022', '  6 August 2022', '\n']
['0002', '  Sky Suites ', '  1000SQFT', '  Taman MingMing', '  Persinsin 2', '  Selangor', '  Kuala Lumpur ', '  Not Furnished ', '  Not Ready', '  Apartment', '  RM1000', '  Freehold ', '  10 November 2022', '  19 August 2022', '']
Enter line: 2

How do you append so that the user can modify line [0], and replace 0001 to 0003 for example.

Upvotes: 0

Views: 86

Answers (2)

cherrywoods
cherrywoods

Reputation: 1361

You can use the following code to implement the desired functionality:

# read all lines
with open("Apartment_Details.txt", "r") as file:
    lines = file.readlines()

line_i = int(input("Enter line: "))
# only splitting the line here, because we don't need to split the others
words = lines[line_i].split(",")
print(words)

word_i = int(input("Enter word position: "))
new_word = input("Enter replacement: "))
# replace the entry in words => that does not reflect to lines
words[word_i] = new_word
# therefore, also update lines (recombining the splitted words)
lines[line_i] = ",".join(words)

# write back to the file
with open("Apartment_Details.txt", "w") as file:
    file.writelines(lines)

Notes on your code

  • no need to set a = [] when overwriting it directly afterwards.
  • only the last value (the last line) you store on a will be available after the for block
  • you don't need the second with, you're not using the file. You need it of course when writing back to the file
  • The line variable in the second with block is the last line in the file. It's "left over" from the for loop.

Upvotes: 0

Live Forever
Live Forever

Reputation: 178

Is this ok for you?

def mod_apartment():
    a = []
    with open("Apartment_Details.txt", "r") as file:
        for line in file:
            b = line.split(",")
            print(b)
            a.append(b)
            
    lno = int(input("\nEnter line index: "))
    wdo = int(input("Enter word index: "))
    word = input("Replace with: ")
    a[lno][wdo] = word

    print("\nNew lines:")
    with open("Apartment_Details.txt", "w") as file:
        for line in a:
            print(line)
            file.write(','.join(line))

Here the user has to write the row and word indices, but if you want to change it to the numbers of these objects, just replace this line:

a[lno - 1][wdo - 1] = word

Upvotes: 1

Related Questions