frank quail
anyone got any clue on how to change text in a text file like add the on the start of every line that starts with /
my guess is just read the file add the on the line that starts with / save the string in a variable then do a fresh write?
with open("file.txt", "w") as f:
f.write(modified_string)
thoughts?
faint wrenBOT
anyone got any clue on how to change text in a text file like add `the` on the s...
@frank quail
Python help channel opened
limber crown
anyone got any clue on how to change text in a text file like add `the` on the s...
Pretty much, yeah
frank quail
oh really..
frank quail
Pretty much, yeah
thought there would be a more efficient solution that creating a sting that big?
frank quail
its only 600 lines so it doesn't matter that much
limber crown
how big is the file?
frank quail
ig
limber crown
its only 600 lines so it doesn't matter that much
I do this to files hundreds of thousands of lines long
it will be lightning fast
frank quail
but it would check each line which is inefficient?
frank quail
but yeah i couldn't think of anything else other than iterating each line 😄
limber crown
iteration in python is very fast
frank quail
can i read and write both at the same time tho?
ooo maybe i could just zip through two open() objects?
limber crown
can i read and write both at the same time tho?
I would load the lines into a list then write the list out
frank quail
one for read and one for write
limber crown
with open('file.txt') as f:
lines = f.read().splitlines()
new_lines = []
for line in lines:
if line.startswith('/'):
line = 'the ' + line
new_lines.append(line)
with open('file.txt', 'w') as f:
f.write('\n'.join(new_lines))
that's the entire thing
I wrote it in 30 seconds and it will take python 0.1 seconds to run
frank quail
yeah.. thats pretty much what i was gonna do too..
oo didn't know startswith
`line[0] == "/"
frank quail
```py
with open('file.txt') as f:
lines = f.read().splitlines()
new_lines =...
whats the char for write on top tho?
like append the write
limber crown
do you want to overwrite the file?
frank quail
not a fresh rewrite
frank quail
do you want to overwrite the file?
just asking
limber crown
so you basically want to double the file?
you can use "a" instead of "w"
it will append to the existing file instead of overwriting
frank quail
```py
with open('file.txt') as f:
lines = f.read().splitlines()
new_lines =...
btw if i do this it doesn't show a newline character
lines = []
with open("output1.txt", "r") as f:
for line in f.readlines():
print(line + "line ends")
if line[0] == "/":
lines.append(f"{main_url}{line}")
else:
lines.append(line)
print("end results:")
for line in lines:
print(line)
but if i do this it does show a newline character in list why?
print(lines)
!e
text = 'hello\nworld'
print(text)
print([text])
:white_check_mark: Your 3.13 eval job has completed with return code 0.
001 | hello
002 | world
003 | ['hello\nworld']
are you asking why you see the \n in the list but not when it's out of the list/
frank quail
its like x = ["item\n", "kekwww\n"] but
for i in x:
. prints item without the \n
look at my example. Strings display differently inside a list than outside
it would be chaos if newlines were parsed when strings were in a list
frank quail
its like x = ["item\n", "kekwww\n"] but
```py
for i in x:
. prints item withou...
so it would be fine if i write it like this i wont get any newline characters in my file
limber crown
this is because of something called __repr__ though
limber crown
so it would be fine if i write it like this i wont get any newline characters in...
newline characters won't show up in the file. They'll be interpreted as actual newlines
if you ever want to see the "raw" interpretation of a string, you can use repr()
!e
text = 'hello\nworld'
print(repr(text))
:white_check_mark: Your 3.13 eval job has completed with return code 0.
'hello\nworld'
this is the python string literal though, that doesn't mean it's how it will be written to file
in file it will be
hello
world
nice
frank quail
this is the python string literal though, that doesn't mean it's how it will be ...
so if i do file.write("hello\nworld") the file would look like
hello
world
but what if i actually wanna write "look at this \n <- its called a newline character" then what
limber crown
you have to escape it
an easy way is to create a raw string. It's a bit trickier if you already have the string created though
frank quail
lines = []
with open("output1.txt", "r") as f:
for line in f.readlines():
print(line + "line ends")
if line[0] == "/":
lines.append(f"{main_url}{line}")
else:
lines.append(line)
with open("output2.txt", "w") as f:
f.write("".join(lines))
this works
limber crown
!e
text = r'hello\nworld'
print(repr(text))
:white_check_mark: Your 3.13 eval job has completed with return code 0.
'hello\\nworld'
yeah, you don't really have to handle the newlines if you use readlines()
frank quail
it doesn't include n..
limber crown
I did read().splitlines() which gets rid of the \n
that's why I did '\n'.join when I wrote it back to file
frank quail
yeah, you don't really have to handle the newlines if you use readlines()
btw this is offtopic do you know how can i search something?
like any text
open firefox automatically and paste in url
one way could be to just use selenium?
but i want something like a keyboard shortcut
select any text + keybinding => and boom search it
limber crown
I haven't really done web scraping, I'm not sure
faint wrenBOT
Python help channel closed for inactivity