def deleteEmployee(self,code,name):
with open("employee.data","r+") as file:
# data=file.readlines()
for num, i in enumerate(file,1):
print(i)
a=i[:len(i)-1]
if str(a)==str(code):
print("found at",num)
file.seek(num)
file.write("\n")
file.close()
I just want to write a file handling code. Here I define delete function where I want to delete particular code if exists inside the file but it's not working.
This code should achieve what you want:
def deleteEmployee(self,code,name):
with open("employee.data","r+") as file:
new_content = ""
for num, line in enumerate(file,1):
print(line)
a=line[:-1]
if str(a)==str(code):
print("found at ",num)
new_content += "\n" #Adds newline instead of 'bad' lines
else:
new_content += line #Adds line for 'good' lines
file.seek(0) #Returns to start of file
file.write(new_content) #Writes cleaned content
file.truncate() #Deletes 'old' content from rest of file
file.close()
Related
So,I have this problem,the code below will delete the 3rd line in a text file.
with open("sample.txt","r") as f:
lines = f.readlines()
del lines[2]
with open("sample.txt", "w+") as f2:
for line in lines:
f2.write(line)
How to delete all lines from a text file?
Why use loop if you want to have an empty file anyways?
f = open("sample.txt", "r+")
f.seek(0)
f.truncate()
This will empty the content without deleting the file!
I think you to need something like this
import os
def delete_line(original_file, line_number):
""" Delete a line from a file at the given line number """
is_skipped = False
current_index = 1
dummy_file = original_file + '.bak'
# Open original file in read only mode and dummy file in write mode
with open(original_file, 'r') as read_obj, open(dummy_file, 'w') as write_obj:
# Line by line copy data from original file to dummy file
for line in read_obj:
# If current line number matches the given line number then skip copying
if current_index != line_number:
write_obj.write(line)
else:
is_skipped = True
current_index += 1
# If any line is skipped then rename dummy file as original file
if is_skipped:
os.remove(original_file)
os.rename(dummy_file, original_file)
else:
os.remove(dummy_file)
I am working on NLP project and have extracted the text from pdf using PyPDF2. Further, I removed the blank lines. Now, my output is being shown on the console but I want to populate the text file with the same data which is stored in my variable (file).
Below is the code which is removing the blank lines from a text file.
for line in open('resume1.txt'):
line = line.rstrip()
if line != '':
file=line
print(file)
Output on Console:
Eclipse,
Visual Studio 2012,
Arduino IDE,
Java
,
HTML,
CSS
2013
Excel
.
Now, I want the same data in my (resume1.txt) text file. I have used three methods but all these methods print a single dot in my resume1.txt file. If I see at the end of the text file then there is a dot which is being printed.
Method 1:
with open("resume1.txt", "w") as out_file:
out_file.write(file)
Method 2:
print(file, file=open("resume1.txt", 'w'))
Method 3:
pathlib.Path('resume1.txt').write_text(file)
Could you please be kind to assist me in populating the text file. Thank you for your cooperation.
First of all, note that you are writing to the same file losing the old data, I don't know if you want to do that. Other than that, every time you write using those methods, you are overwriting the data you previously wrote to the output file. So, if you want to use these methods, you must write just 1 time (write all the data).
SOLUTIONS
Using method 1:
to_file = []
for line in open('resume1.txt'):
line = line.rstrip()
if line != '':
file = line
print(file)
to_file.append(file)
to_save = '\n'.join(to_file)
with open("resume1.txt", "w") as out_file:
out_file.write(to_save)
Using method 2:
to_file = []
for line in open('resume1.txt'):
line = line.rstrip()
if line != '':
file = line
print(file)
to_file.append(file)
to_save = '\n'.join(to_file)
print(to_save, file=open("resume1.txt", 'w'))
Using method 3:
import pathlib
to_file = []
for line in open('resume1.txt'):
line = line.rstrip()
if line != '':
file = line
print(file)
to_file.append(file)
to_save = '\n'.join(to_file)
pathlib.Path('resume1.txt').write_text(to_save)
In these 3 methods, I have used to_save = '\n'.join(to_file) because I'm assuming you want to separate each line of other with an EOL, but if I'm wrong, you can just use ''.join(to_file) if you want not space, or ' '.join(to_file) if you want all the lines in a single one.
Other method
You can do this by using other file, let's say 'output.txt'.
out_file = open('output.txt', 'w')
for line in open('resume1.txt'):
line = line.rstrip()
if line != '':
file = line
print(file)
out_file.write(file)
out_file.write('\n') # EOL
out_file.close()
Also, you can do this (I prefer this):
with open('output.txt', 'w') as out_file:
for line in open('resume1.txt'):
line = line.rstrip()
if line != '':
file = line
print(file)
out_file.write(file)
out_file.write('\n') # EOL
First post on stack, so excuse the format
new_line = ""
for line in open('resume1.txt', "r"):
for char in line:
if char != " ":
new_line += char
print(new_line)
with open('resume1.txt', "w") as f:
f.write(new_line)
I have a text file which contains the following paragraph:
The above with statement will automatically close the file after the nested block of code. The above with statement will automatically close the file after the nested block of code. The above with statement will automatically close the file after the nested block of code.
The above with statement will automatically close the file after the nested block of code without.
Now, I would like to modify the file by separating the individual lines for the paragraph, and save it in the same text file as the following:
The above with statement will automatically close the file after the nested block of code.
The above with statement will automatically close the file after the nested block of code.
The above with statement will automatically close the file after the nested block of code.
The above with statement will automatically close the file after the nested block of code without.
I was able to do it, but it was bit complicated. My code is as follows:
try-1
file = open("file_path")
content = file.read()
file.close()
file = open("file_path", 'w')
a = content.replace('. ', '.\n')
file.write(a)
file.close()
try-2
file = open("file_path")
contents = file.readlines()
file.close()
b = []
for line in contents:
if not line.strip():
continue
else:
b.append(line)
b = "".join(b)
file = open("file_path", 'w')
file.write(b)
file.close()
I opened the file twice to read and twice to write, is there any better way to separate the line from a paragraph from a text file, and writing it to the same text file?
You can do:
with open('filepath', 'r') as contents, open('filepath', 'w') as file:
contents = contents.read()
lines = contents.split('. ')
for index, line in enumerate(lines):
if index != len(lines) - 1:
file.write(line + '.\n')
else:
file.write(line + '.')
You can use seek method of files to jump in current file:
f.seek(offset, from_what)
And if you want to use file for write and read use option r+:
file = open("file_path", 'r+')
You also can skip step with readlines and use file iteration. Code should be:
file = open("file_path", "r+")
content = file.read()
a = content.replace('. ', '.\n')
file.seek(0)
file.write(a)
file.seek(0)
b = []
for line in file:
if not line.strip():
continue
else:
b.append(line)
b = "".join(b)
file.seek(0)
file.write(b)
file.close()
i have this piece of code:
asm = open(infile)
asmw = open(outfile, "w")
shutil.copyfile(infile, outfile)
for x in range(0, 8):
xorreg.append("xor " + reg[x] + ", " + reg[x])
for line in asm:
if any(s in line for s in xorreg):
found += line.count(xorreg[x])
print line
i want to write some text lines in the file right before "line" (the one printed)
how can i do that?
Thanks
This script appends to every lien containing the string Gandalf a new string The greatest wizard of all times was:
# show what's in the file
with open("some_file.txt", 'r') as f:
print f.read()
new_content = []
with open("some_file.txt", "r") as asmr:
for line in asmr.readlines():
if "Gandalf" in line:
# we have a match,we want something but we before that...
new_content += "The greatest wizard of all times was:"
new_content += line
# write the file with the new content
with open("some_file.txt", "w") as asmw:
asmw.writelines(new_content)
# show what's in the file now
with open("some_file.txt", 'r') as f:
print f.read()
I'm trying to add specific lines to a specific area in my file.
I am using this:
new_file = open("file.txt", "r+")
for line in new_file:
if line == "; Include below":
line = line + "\nIncluded text"
new_file.write(line)
else:
new_file.write(line)
But for some reason the content of my file.txt is duplicating.
Edit: If my file looks like:
blablablablablablabal
balablablabalablablbla
include below
blablablablablabalablab
ablablablabalbalablaba
I want make it look like:
blablablablablablabal
balablablabalablablbla
include below
included text
blablablablablabalablab
ablablablabalbalablaba
You cannot safely write to a file while reading, it is better to read the file into memory, update it, and rewrite it to file.
with open("file.txt", "r") as in_file:
buf = in_file.readlines()
with open("file.txt", "w") as out_file:
for line in buf:
if line == "; Include this text\n":
line = line + "Include below\n"
out_file.write(line)
This is what I did.
def find_append_to_file(filename, find, insert):
"""Find and append text in a file."""
with open(filename, 'r+') as file:
lines = file.read()
index = repr(lines).find(find) - 1
if index < 0:
raise ValueError("The text was not found in the file!")
len_found = len(find) - 1
old_lines = lines[index + len_found:]
file.seek(index)
file.write(insert)
file.write(old_lines)
# end find_append_to_file
Use sed:
$ sed '/^include below/aincluded text' < file.txt
Explanation:
/^include below/: matches every line that starts (^) with include below
a: appends a newline and the following text
includeed text: the text that a appends
Edit: Using Python:
for line in open("file.txt").readlines():
print(line, end="")
if line.startswith("include below"):
print("included text")