I need to search for a name in a file and in the line starting with that name, I need to replace the fourth item in the list that is separated my commas. I have began trying to program this with the following code, but I have not got it to work.
with open("SampleFile.txt", "r") as f:
newline=[]
for word in f.line():
newline.append(word.replace(str(String1), str(String2)))
with open("SampleFile.txt", "w") as f:
for line in newline :
f.writelines(line)
#this piece of code replaced every occurence of String1 with String 2
f = open("SampleFile.txt", "r")
for line in f:
if line.startswith(Name):
if line.contains(String1):
newline = line.replace(str(String1), str(String2))
#this came up with a syntax error
You could give some dummy data which would help people to answer your question. I suppose you to backup your data: You can save the edited data to a new file or you can backup the old file to a backup folder before working on the data (think about using "from shutil import copyfile" and then "copyfile(src, dst)"). Otherwise by making a mistake you could easily ruin your data without being able to easily restore them.
You can't replace the string with "newline = line.replace(str(String1), str(String2))"! Think about "strong" as your search term and a line like "Armstrong,Paul,strong,44" - if you replace "strong" with "weak" you would get "Armweak,Paul,weak,44".
I hope the following code helps you:
filename = "SampleFile.txt"
filename_new = filename.replace(".", "_new.")
search_term = "Smith"
with open(filename) as src, open(filename_new, 'w') as dst:
for line in src:
if line.startswith(search_term):
items = line.split(",")
items[4-1] = items[4-1].replace("old", "new")
line = ",".join(items)
dst.write(line)
If you work with a csv-file you should have a look at the csv module.
PS My files contain the following data (the filenames are not in the files!!!):
SampleFile.txt SampleFile_new.txt
Adams,George,m,old,34 Adams,George,m,old,34
Adams,Tracy,f,old,32 Adams,Tracy,f,old,32
Smith,John,m,old,53 Smith,John,m,new,53
Man,Emily,w,old,44 Man,Emily,w,old,44
Related
I am a little bit confused in how to read all lines in many files where the file names have format from "datalog.txt.98" to "datalog.txt.120".
This is my code:
import json
file = "datalog.txt."
i = 97
for line in file:
i+=1
f = open (line + str (i),'r')
for row in f:
print (row)
Here, you will find an example of one line in one of those files:
I need really to your help
I suggest using a loop for opening multiple files with different formats.
To better understand this project I would recommend researching the following topics
for loops,
String manipulation,
Opening a file and reading its content,
List manipulation,
String parsing.
This is one of my favourite beginner guides.
To set the parameters of the integers at the end of the file name I would look into python for loops.
I think this is what you are trying to do
# create a list to store all your file content
files_content = []
# the prefix is of type string
filename_prefix = "datalog.txt."
# loop from 0 to 13
for i in range(0,14):
# make the filename variable with the prefix and
# the integer i which you need to convert to a string type
filename = filename_prefix + str(i)
# open the file read all the lines to a variable
with open(filename) as f:
content = f.readlines()
# append the file content to the files_content list
files_content.append(content)
To get rid of white space from file parsing add the missing line
content = [x.strip() for x in content]
files_content.append(content)
Here's an example of printing out files_content
for file in files_content:
print(file)
sample input
in parsing a text file .txt = ["'blah.txt'", "'blah1.txt'", "'blah2.txt'" ]
the expected output in another text file out_path.txt
blah.txt
blah1.txt
blah2.txt
Code that I tried, this just appends "[]" to the input file. While I also tried perl one liner replacing double and single quotes.
read_out_fh = open('out_path.txt',"r")
for line in read_out_fh:
for word in line.split():
curr_line = re.findall(r'"(\[^"]*)"', '\n')
print(curr_line)
this happens because while you reading a file it will be taken as string and not as a list even if u kept the formatting of a list. thats why you getting [] while doing re.for line in read_in_fh: here you are taking each letters in the string thats why you are not getting the desired output. so iwrote something first to transform the string into a list. while doing that i also eliminated "" and '' as you mensioned. then wrote it in to a new file example.txt.
Note: change the file name according to your files
read_out_fh = open('file.txt',"r")
for line in read_out_fh:
line=line.strip("[]").replace('"','').replace("'",'').split(", ")
with open("example.txt", "w") as output:
for word in line:
#print(word)
output.write(word+'\n')
example.txt(outputfile)
blah.txt
blah1.txt
blah2.txt
The code below works out for your example you gave in the question:
# Content of textfile.txt:
asdasdasd=["'blah.txt'", "'blah1.txt'", "'blah2.txt'"]asdasdasd
# Code:
import re
read_in_fh = open('textfile.txt',"r")
write_out_fh = open('out_path.txt', "w")
for line in read_in_fh:
find_list = re.findall(r'\[(".*?"*)\]', line)
for element in find_list[0].split(","):
element_formatted = element.replace('"','').replace("'","").strip()
write_out_fh.write(element_formatted + "\n")
write_out_fh.close()
I have a text file say storyfile.txt
Content in storyfile.txt is as
'Twas brillig, and the slithy toves
Did gyre and gimble in the wabe;
All mimsy were the borogoves,
And the mome raths outgrabe
I have another file- hashfile.txt that contains some words separated by comma(,)
Content of hashfile.txt is:
All,mimsy,were,the,borogoves,raths,outgrabe
My objective
My objective is to
1. Read hashfile.txt
2. Insert Hashtag on each of the comma separated word
3. Read storyfile.txt . Search for same words as in hashtag.txt and add hashtag on these words.
4. Update storyfile.txt with words that are hash-tagged
My Python code so far
import in_place
hashfile = open('hashfile.txt', 'w+')
n1 = hashfile.read().rstrip('\n')
print(n1)
checkWords = n1.split(',')
print(checkWords)
repWords = ["#"+i for i in checkWords]
print(repWords)
hashfile.close()
with in_place.InPlace('storyfile.txt') as file:
for line in file:
for check, rep in zip(checkWords, repWords):
line = line.replace(check, rep)
file.write(line)
The output
can be seen here
https://dpaste.de/Yp35
Why is this kind of output is coming?
Why the last sentence has no newlines in it?
Where I am wrong?
The output
attached image
The current working code for single text
import in_place
with in_place.InPlace('somefile.txt') as file:
for line in file:
line = line.replace('mome', 'testZ')
file.write(line)
Look if this helps. This fulfills the objective that you mentioned, though I have not used the in_place module.
hash_list = []
with open("hashfile.txt", 'r') as f:
for i in f.readlines():
for j in i.split(","):
hash_list.append(j.strip())
with open("storyfile.txt", "r") as f:
for i in f.readlines():
for j in hash_list:
i = i.replace(j, "#"+j)
print(i)
Let me know if you require further clarification on the same.
I've read every thing I can find and tried about 20 examples from SO and google, and nothing seems to work.
This should be very simple, but I cannot get it to work. I just want to point to a folder, and replace every double quote in every file in the folder. That is it. (And I don't know Python well at all, hence my issues.) I have no doubt that some of the scripts I've tried to retask must work, but my lack of Python skill is getting in the way. This is as close as I've gotten, and I get errors. If I don't get errors it seems to do nothing. Thanks.
import glob
import csv
mypath = glob.glob('\\C:\\csv\\*.csv')
for fname in mypath:
with open(mypath, "r") as infile, open("output.csv", "w") as outfile:
reader = csv.reader(infile)
writer = csv.writer(outfile)
for row in reader:
writer.writerow(item.replace("""", "") for item in row)
You don't need to use csv-specific file opening and writing, I think that makes it more complex. How about this instead:
import os
mypath = r'\path\to\folder'
for file in os.listdir(mypath): # This will loop through every file in the folder
if '.csv' in file: # Check if it's a csv file
fpath = os.path.join(mypath, file)
fpath_out = fpath + '_output' # Create an output file with a similar name to the input file
with open(fpath) as infile
lines = infile.readlines() # Read all lines
with open(fpath_out, 'w') as outfile:
for line in lines: # One line at a time
outfile.write(line.replace('"', '')) # Remove each " and write the line
Let me know if this works, and respond with any error messages you may have.
I found the solution to this based on the original answer provided by u/Jeff. It was actually smart quotes (u'\u201d') to be exact, not straight quotes. That is why I could get nothing to work. That is a great way to spend like two days, now if you'll excuse me I have to go jump off the roof. But for posterity, here is what I used that worked. (And note - there is the left curving smart quote as well - that is u'\u201c'.
mypath = 'C:\\csv\\'
myoutputpath = 'C:\\csv\\output\\'
for file in os.listdir(mypath): # This will loop through every file in the folder
if '.csv' in file: # Check if it's a csv file
fpath = os.path.join(mypath, file)
fpath_out = os.path.join(myoutputpath, file) #+ '_output' # Create an output file with a similar name to the input file
with open(fpath) as infile:
lines = infile.readlines() # Read all lines
with open(fpath_out, 'w') as outfile:
for line in lines: # One line at a time
outfile.write(line.replace(u'\u201d', ''))# Remove each " and write the line
infile.close()
outfile.close()
I am writing this code to separate information which will be uploaded to a database using the resulting CSV file from the code I wrote. I have it so that if I receive a spreadsheet with First, Middle, and Last name all in the same column they can be split into three separated columns. However my output file has some extra line breaks or returns or something which I just went through in the CSV and deleted manually to get the data uploaded for now. How can I remove these within my code? I have some ideas but none seem to work. I tried using line.replace but I do not fully understand how that is supposed to work so it failed.
My code:
import csv
with open('c:\\users\\cmobley\\desktop\\split for crm check.csv', "r") as readfile:
name_split = []
for line in readfile:
whitespace_split = line.split(" ")
remove_returns = (line.replace('/n', "") for line in whitespace_split)
name_split.append(remove_returns)
print (name_split)
with open ('c:\\users\cmobley\\desktop\\testblank.csv', 'w', newline = '\n') as csvfile:
writer = csv.writer(csvfile, delimiter = ',',
quotechar = '"', quoting = csv.QUOTE_MINIMAL)
writer.writerows(name_split)
Thanks for any help that can be provided! I am still trying to learn Python.
You have a forward-slash rather than a backward-slash needed for escape sequences.
Change to:
remove_returns = (line.replace('\n', "") for line in whitespace_split)