Python split and find specific string from a text file - python

I have a raw data in a .txt file format and would like to convert it to .csv file format.
This is a sample data from the txt fle:
(L2-CR666 Reception Counter) L2-CR666 Reception Counter has been forced.
(L7-CR126 Handicapped Toilet) L7-CR126 Handicapped Toilet has been forced.
I would like to achieve the following result:
L2-CR666 Reception Counter, forced
L7-CR126 Handicapped Toilet, forced
I have tried the following code but was unable to achieve the stated result. Where did I went wrong?
import csv
with open('Converted Detection\\Testing 01\\2019-02-21.txt') as infile, open('Converted Detection\\Converted CSV\\log.csv', 'w') as outfile:
for line in infile:
outfile.write(infile.read().replace("(", ""))
for line in infile:
outfile.write(', '.join(infile.read().split(')')))
outfile.close()

You can try this :
with open('Converted Detection\\Testing 01\\2019-02-21.txt') as infile, open('Converted Detection\\Converted CSV\\log.csv', 'w') as outfile:
for line in infile:
# Get text inside ()
text = line[line.find("(")+1:line.find(")")]
# Remove \r\n
line = line.rstrip("\r\n")
# Get last word
forcedText = line.split(" ")[len(line.split(" "))-1]
# Remove . char
forcedText = forcedText[:len(forcedText)-1]
outfile.write(text+", "+forcedText+"\n")
outfile.close()
Best

You could use .partition() to truncate everything before ) and then simply replace the parts you do not want accordingly. Also, you do not have to close the file when using the with statement as it automatically closes it for you, and you do not have to import the csv library to save a file with the .csv extension.
The following code outputs your wanted result:
infile_path = "Converted Detection\\Testing 01\\2019-02-21.txt"
outfile_path = "Converted Detection\\Converted CSV\\log.csv"
with open(infile_path, "r") as infile, open(outfile_path, "+w") as outfile:
for line in infile:
line = line.partition(")")[2].replace(" has been forced.", ", forced").strip()
outfile.write(line + "\n")

First for loop is reading infile. No need to reread infile and second loop.
Also with block will take care of closing files.
for line in infile:
line = line.replace("(", "")
outfile.write(', '.join(line.split(')')))

I would suggest using:
lineout = ', '.join(linein.replace('(','').replace(')','').split(' has been ')
where:
linein = line.strip()

Related

Trying to remove multiple space in txt file using python [duplicate]

So I have this crazy long text file made by my crawler and it for some reason added some spaces inbetween the links, like this:
https://example.com/asdf.html (note the spaces)
https://example.com/johndoe.php (again)
I want to get rid of that, but keep the new line. Keep in mind that the text file is 4.000+ lines long. I tried to do it myself but figured that I have no idea how to loop through new lines in files.
Seems like you can't directly edit a python file, so here is my suggestion:
# first get all lines from file
with open('file.txt', 'r') as f:
lines = f.readlines()
# remove spaces
lines = [line.replace(' ', '') for line in lines]
# finally, write lines in the file
with open('file.txt', 'w') as f:
f.writelines(lines)
You can open file and read line by line and remove white space -
Python 3.x:
with open('filename') as f:
for line in f:
print(line.strip())
Python 2.x:
with open('filename') as f:
for line in f:
print line.strip()
It will remove space from each line and print it.
Hope it helps!
Read text from file, remove spaces, write text to file:
with open('file.txt', 'r') as f:
txt = f.read().replace(' ', '')
with open('file.txt', 'w') as f:
f.write(txt)
In #Leonardo Chirivì's solution it's unnecessary to create a list to store file contents when a string is sufficient and more memory efficient. The .replace(' ', '') operation is only called once on the string, which is more efficient than iterating through a list performing replace for each line individually.
To avoid opening the file twice:
with open('file.txt', 'r+') as f:
txt = f.read().replace(' ', '')
f.seek(0)
f.write(txt)
f.truncate()
It would be more efficient to only open the file once. This requires moving the file pointer back to the start of the file after reading, as well as truncating any possibly remaining content left over after you write back to the file. A drawback to this solution however is that is not as easily readable.
I had something similar that I'd been dealing with.
This is what worked for me (Note: This converts from 2+ spaces into a comma, but if you read below the code block, I explain how you can get rid of ALL whitespaces):
import re
# read the file
with open('C:\\path\\to\\test_file.txt') as f:
read_file = f.read()
print(type(read_file)) # to confirm that it's a string
read_file = re.sub(r'\s{2,}', ',', read_file) # find/convert 2+ whitespace into ','
# write the file
with open('C:\\path\\to\\test_file.txt', 'w') as f:
f.writelines('read_file')
This helped me then send the updated data to a CSV, which suited my need, but it can help for you as well, so instead of converting it to a comma (','), you can convert it to an empty string (''), and then [or] use a read_file.replace(' ', '') method if you don't need any whitespaces at all.
Lets not forget about adding back the \n to go to the next row.
The complete function would be :
with open(str_path, 'r') as file :
str_lines = file.readlines()
# remove spaces
if bl_right is True:
str_lines = [line.rstrip() + '\n' for line in str_lines]
elif bl_left is True:
str_lines = [line.lstrip() + '\n' for line in str_lines]
else:
str_lines = [line.strip() + '\n' for line in str_lines]
# Write the file out again
with open(str_path, 'w') as file:
file.writelines(str_lines)

How to read quoted string from File and write it without quotes?

I am trying to write a python script to convert rows in a file to json output, where each line contains a json blob.
My code so far is:
with open( "/Users/me/tmp/events.txt" ) as f:
content = f.readlines()
# strip to remove newlines
lines = [x.strip() for x in content]
i = 1
for line in lines:
filename = "input" + str(i) + ".json"
i += 1
f = open(filename, "w")
f.write(line)
f.close()
However, I am running into an issue where if I have an entry in the file that is quoted, for example:
client:"mac"
This will be output as:
"client:""mac"""
Using a second strip on writing to file will give:
client:""mac
But I want to see:
client:"mac"
Is there any way to force Python to read text in the format ' "something" ' without appending extra quotes around it?
Instead of creating an auxiliary list to strip the newline from content, just open the input and output files at the same time. Write to the output file as you iterate through the lines of the input and stripping whatever you deem necessary. Try something like this:
with open('events.txt', 'rb') as infile, open('input1.json', 'wb') as outfile:
for line in infile:
line = line.strip('"')
outfile.write(line)

Removing all spaces in text file with Python 3.x

So I have this crazy long text file made by my crawler and it for some reason added some spaces inbetween the links, like this:
https://example.com/asdf.html (note the spaces)
https://example.com/johndoe.php (again)
I want to get rid of that, but keep the new line. Keep in mind that the text file is 4.000+ lines long. I tried to do it myself but figured that I have no idea how to loop through new lines in files.
Seems like you can't directly edit a python file, so here is my suggestion:
# first get all lines from file
with open('file.txt', 'r') as f:
lines = f.readlines()
# remove spaces
lines = [line.replace(' ', '') for line in lines]
# finally, write lines in the file
with open('file.txt', 'w') as f:
f.writelines(lines)
You can open file and read line by line and remove white space -
Python 3.x:
with open('filename') as f:
for line in f:
print(line.strip())
Python 2.x:
with open('filename') as f:
for line in f:
print line.strip()
It will remove space from each line and print it.
Hope it helps!
Read text from file, remove spaces, write text to file:
with open('file.txt', 'r') as f:
txt = f.read().replace(' ', '')
with open('file.txt', 'w') as f:
f.write(txt)
In #Leonardo Chirivì's solution it's unnecessary to create a list to store file contents when a string is sufficient and more memory efficient. The .replace(' ', '') operation is only called once on the string, which is more efficient than iterating through a list performing replace for each line individually.
To avoid opening the file twice:
with open('file.txt', 'r+') as f:
txt = f.read().replace(' ', '')
f.seek(0)
f.write(txt)
f.truncate()
It would be more efficient to only open the file once. This requires moving the file pointer back to the start of the file after reading, as well as truncating any possibly remaining content left over after you write back to the file. A drawback to this solution however is that is not as easily readable.
I had something similar that I'd been dealing with.
This is what worked for me (Note: This converts from 2+ spaces into a comma, but if you read below the code block, I explain how you can get rid of ALL whitespaces):
import re
# read the file
with open('C:\\path\\to\\test_file.txt') as f:
read_file = f.read()
print(type(read_file)) # to confirm that it's a string
read_file = re.sub(r'\s{2,}', ',', read_file) # find/convert 2+ whitespace into ','
# write the file
with open('C:\\path\\to\\test_file.txt', 'w') as f:
f.writelines('read_file')
This helped me then send the updated data to a CSV, which suited my need, but it can help for you as well, so instead of converting it to a comma (','), you can convert it to an empty string (''), and then [or] use a read_file.replace(' ', '') method if you don't need any whitespaces at all.
Lets not forget about adding back the \n to go to the next row.
The complete function would be :
with open(str_path, 'r') as file :
str_lines = file.readlines()
# remove spaces
if bl_right is True:
str_lines = [line.rstrip() + '\n' for line in str_lines]
elif bl_left is True:
str_lines = [line.lstrip() + '\n' for line in str_lines]
else:
str_lines = [line.strip() + '\n' for line in str_lines]
# Write the file out again
with open(str_path, 'w') as file:
file.writelines(str_lines)

How to save the output of the print statements to a CSV file?

I have written the following to isolate a very specific part of a file:
for line in open('120301.KAP'):
rec = line.strip()
if rec.startswith('PLY'):
print line
The output appears as such
PLY/1,48.107478621032,-69.733975000000
PLY/2,48.163516399836,-70.032838888053
PLY/3,48.270000002883,-70.032838888053
PLY/4,48.270000002883,-69.712824977522
PLY/5,48.192379262383,-69.711801581207
PLY/6,48.191666671083,-69.532840015422
PLY/7,48.033358898628,-69.532840015422
PLY/8,48.033359033880,-69.733975000000
PLY/9,48.107478621032,-69.733975000000
Ideally what I am hoping for is the output to create a CSV file with just the coordinates. The PLY/1, PLY/2, etc. does not need to stay.
Is this doable? If not, at least can the print statements result in a new text file with the same name as the KAP file?
You can use the csv module:
import csv
with open('120301.csv', 'w', newline='') as file:
writer = csv.writer(file)
for line in open('120301.KAP'):
rec = line.strip()
if rec.startswith('PLY'):
writer.writerow(rec.split(','))
In a similar way, the csv.reader can easily read records from your input file.
https://docs.python.org/3/library/csv.html?highlight=csv#module-contents
If you are using Python 2.x, you should open the file in binary mode:
import csv
with open('120301.csv', 'wb') as file:
writer = csv.writer(file)
for line in open('120301.KAP'):
rec = line.strip()
if rec.startswith('PLY'):
writer.writerow(rec.split(','))
You could open the file at the beginning of your code and then just add a write statement after the print line.
Something like this:
target = open(filename, 'w')
for line in open('120301.KAP'):
rec = line.strip()
if rec.startswith('PLY'):
print line
target.write(line)
target.write("\n") #writes a new line
This is totally doable!
Here are a couple of links to some docs for writing/reading CSV:
https://docs.python.org/2/library/csv.html
You could also just make your own CSV with the regular file reading/writing functions.
file = open('data', rw)
output = open('output.csv', w)
file.write('your infos') #add a comma to each string you output?
The simplest way is to redirect stdout to a file:
for i in range(10):
print str(i) + "," + str(i*2)
will output:
0,0
1,2
2,4
3,6
4,8
5,10
6,12
7,14
8,16
9,18
if you run it as python myprog.py > myout.txt the result go to myout.txt

Writing a new text file in python

I'm writing code that goes over a text file counting how many words are in every line and having trouble putting the result (many lines that each consist ofa number) into a new text file.
My code:
in_file = open("our_input.txt")
out_file = open("output.txt", "w")
for line in in_file:
line = (str(line)).split()
x = (len(line))
x = str(x)
out_file.write(x)
in_file.close()
out_file.close()
But the file I'm getting has all the number together in one line.
How do I seperate them in the file I'm making?
You need to add a new line after each line :
out_file.write(x + '\n')
Also as a more pythonic way for dealing with files you can use with statement to open the files which will close the files at the end of the block.
And instead of multiple assignment and converting the length to string you can use str.format() method to do all of this jobs in one line:
with open("our_input.txt") as in_file,open("output.txt", "w") as out_file:
for line in in_file:
out_file.write('{}\n'.format(len(line.split())))
Add newline in the file while writing
in_file = open("our_input.txt")
out_file =open("output.txt", "w")
for line in in_file:
line= (str(line)).split()
x=(len(line))
x=str(x)
out_file.write(x)
#Write newline
out_file.write('\n')
in_file.close()
As the previous answers have pointed out, your need to write a newline to separate the ouput.
Here is yet another way to write the code
with open("our_input.txt") as in_file, open("output.txt", "w") as out_file:
res = map(lambda line: len(line.split()), in_file)
for r in res:
out_file.write('%d\n' % r)

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