Python: how to omit lines in a .txt file - python

I need to omit all the information before '* START' and after '* END' in the txt file we open in Python(so the .txt is only the body)
We were given a string parameter and have written. it continues to write out the original .txt instead of just the body
def copy_file_2(s:str):
"that if its parameter is 'Gutenberg trim' it will copy only the body of a Project Gutenberg file, omitting the "housekeeping" material at the front and end. "
infile_name = input("Please enter the name of the file to copy: ")
infile = open(infile_name, 'r', errors = 'ignore')
outfile_name = input("Please enter the name of the new copy: ")
outfile = open(outfile_name, 'w')
if s == 'Gutenberg trim':
infile_data = infile.readlines()
for i in range(len(infile_data)):
t = '{:5d}: {}'.format(i+1,infile_data[i])
if "*** START" in t:
outfile.write(t)
else:
for line in infile:
outfile.write(line)
infile.close()
outfile.close()


print re.search("START(.*)END",open("some_file").read(),re.DOTALL).groups()[0]
Im pretty sure should work fine for you ...

Related

How to add numbers to a file

I'm a beginner at Python and I just learned about opening files, reading files, writing files, and appending files.
I would I like to implement this to a little project that I'm making that asks for the user's name and appends it to a txt file named "HallOfFame.txt"
try:
infile = open('HallOfFame.txt', 'r')
file_contents = infile.read()
print(file_contents)
infile.close()
except:
FileNotFoundError
print("No Human Has Ever Beat Me... mwah-ha-ha-ha!")
name_file = open("HallOfFame.txt", 'a')
name_record = input("Please enter your name: ")
name_file.write(str(name_record) + '\n')
name_file.close()
Everytime someone adds their name, I'd like it to become something like this:
Vix
Mike
Valerie
Something similar like that (above) where they have to run the program again to see the Hall of Fame.
Thank you!

I can understand your question. you can try using the JSON module and do something like this.
import json
list = [1, "Vix"]
with open ('HallOfFame.txt', 'w') as filehandle:
json.dump(list, filehandle)
here you can update the list every time you get input. and write it to the text file. but the appearance will look like this.
[1, "Vix"]
[2, "Mike"]
[3, "Valerie"]

count = 0
try:
infile = open('HallOfFame.txt', 'r')
file_contents = infile.readlines()
if len(file_contents) != 0:
print("\nHall of Fame")
for line in file_contents:
count += 1
print("{}. {}".format(count, line.strip()))
print()
infile.close()
except:
FileNotFoundError
print("No Human Has Ever Beat Me... mwah-ha-ha-ha!")
name_file = open("HallOfFame.txt", 'a')
name_record = input("Please enter your name: ")
name_file.write(str(name_record) + "\n")
name_file.close()

Error being written to file when trying to write output

In this spellchecking program i created i seem to be getting a error when trying to write to the output file.The file is created but instead of the output being written an error " <_io.TextIOWrapper name='f.txt' mode='w' encoding='cp1252'>name " is.
I've tried looking for solutions.
print('Spell checking program for Exam 3 lab')
inputFile = input('Enter the name of the file to input from: ')
outputFile = input('Enter the name of the file to output to: ')
f = open("linuxwords.txt", "r")
sent = open(inputFile+ '.txt', "r")
butt = open(outputFile+'.txt', 'w')
word = sent.readline()
print ("mispelled words are:")
while word:
word = word.lower()
success = False
x = word.split()
y=len(x)
for i in x:
success = False
f = open("linuxwords.txt", "r")
line = f.readline()
while line:
if i == line.strip():
success = True
break
line = f.readline()
f.close()
if success == False:
print (i)
word = sent.readline()
with open(outputFile+'.txt', 'w') as f:
f.write(str(butt))
f.write(i)
try:
'''''''
I'm sure my mistake is here, idk
'''''''
f = open(outputFile, "w")
f.write(i)
except:
print('The file',outputFile, 'did not open.')
sent.close()
''''''
Result below
''''''''
Spell checking program for Exam 3 lab
Enter the name of the file to input from: spw
Enter the name of the file to output to: f
misspelled words are:
deks
chris
delatorre
huis
lst

f = open(outputFile)
f.write(i)
You're opening the file for reading, and then trying to write to it.

Code not Working : prompting for file in Coursera Assignment

I'm trying to create a code that will get the filename from the user input and print the contents in uppercase format. Below is my code:
filename = raw_input("Enter file name: ")
fh = open(filename)
for fx in fh:
fy = rstrip()
print(fy.upper)

The upper() and rstrip() functions do not change the string "in place", they return the modified string.
filename = raw_input("Enter file name: ")
fh = open(filename)
for line in fh:
line = line.rstrip()
line = line.upper()
print(line)
fh.close()
Of course all these can be strung together into a big unreadable line:
for line in fh:
print( line.rstrip().upper() )

How to loop through a list of strings in Python

I'm a bit new to Python and I am trying to simplify my existing code.
Right now, I have the code repeated 5 times with different strings. I'd like to have the code one time and have it run through a list of strings.
Currently what I have:
def wiScanFormat():
File = open("/home/pi/gpsMaster/WiScan.txt", "r")
data = File.read()
File.close()
MAC = data.replace("Address:", "\nAddress, ")
File = open("/home/pi/gpsMaster/WiScan.txt", "w")
File.write(MAC)
File.close()
File = open("/home/pi/gpsMaster/WiScan.txt", "r")
data = File.read()
File.close()
SSID = data.replace("ESSID:", "\nESSID, ")
File = open("/home/pi/gpsMaster/WiScan.txt", "w")
File.write(SSID)
File.close()
File = open("/home/pi/gpsMaster/WiScan.txt", "r")
data = File.read()
File.close()
FREQ = data.replace("Frequency:", "\nFrequency, ")
File = open("/home/pi/gpsMaster/WiScan.txt", "w")
File.write(FREQ)
File.close()
File = open("/home/pi/gpsMaster/WiScan.txt", "r")
data = File.read()
File.close()
QUAL = data.replace("Quality", "\nQuality, ")
File = open("/home/pi/gpsMaster/WiScan.txt", "w")
File.write(QUAL)
File.close()
File = open("/home/pi/gpsMaster/WiScan.txt", "r")
data = File.read()
File.close()
SIG = data.replace("Signal level", "\nSignal Level, ")
File = open("/home/pi/gpsMaster/WiScan.txt", "w")
File.write(SIG)
File.close()
What I'd like to have:
ORG = ['Address:', 'ESSID:'...etc]
NEW = ['\nAddress, ' , '\nESSID, ' , ... etc]
and run that through:
File = open("/home/pi/gpsMaster/WiScan.txt", "r")
data = File.read()
File.close()
ID = data.replace("ORG", "NEW")
File = open("/home/pi/gpsMaster/WiScan.txt", "w")
File.write(ID)
File.close()
I've tried running exactly what I put up, but it does not seem to format it the way I need to.
The output from above looks like:
Cell 46 - Address: xx:xx:xx:xx:xx:xx ESSID:"MySSID" Frequency:2.412 GHz (Channel 1) Quality=47/100 Signal level=48/100 Quality=47/100 Signal level=48/100
But it is supposed to look like this (And it does when I run that same block over the strings separately):
xx:xx:xx:xx:xx:xx MySSID 5.18 GHz (Channel 36) 0.81 0.99
How should I go about looping this block of code through my list of strings?
There two strings that I would need for the find and replace, old and new, so they would have to work together. These lists will be the same size, obviously, and I need them to be in the correct order. Address with address, ESSID with ESSID, etc.
Thanks in advance!

Try something like this:
ORG = ['Address:', 'ESSID:'...etc]
NEW = ['\nAddress, ' , '\nESSID, ' , ... etc]
File = open("/home/pi/gpsMaster/WiScan.txt", "r")
data = File.read()
File.close()
for org, new in zip(ORG, NEW):
data = data.replace(org, new)
File = open("/home/pi/gpsMaster/WiScan.txt", "w")
File.write(data)
File.close()
(Note the way zip works: https://docs.python.org/2/library/functions.html#zip)

If I am reading your question right, you are opening the same file, making a small alteration, saving it, and then closing it again, five times. You could just open it once, make all the alterations, and then save it. For instance, like this:
filename = "/home/pi/gpsMaster/WiScan.txt"
with open(filename, 'r') as fin:
data = fin.read()
data = data.replace("Address:", "\nAddress, ")
data = data.replace("ESSID:", "\nESSID, ")
data = data.replace("Frequency:", "\nFrequency, ")
data = data.replace("Quality", "\nQuality, ")
data = data.replace("Signal level", "\nSignal Level, ")
with open(filename, 'w') as fout:
fout.write(data)
If you want to use lists (ORG and NEW) for your replacements, you could do this:
with open(filename, 'r') as fin:
data = fin.read()
for o,n in zip(ORG, NEW):
data = data.replace(o,n)
with open(filename, 'w') as fout:
fout.write(data)

Given your ORG and NEW, the simplest way to do this would be something like:
# Open once for both read and write; use with statement for guaranteed close at end of block
with open("/home/pi/gpsMaster/WiScan.txt", "r+") as f:
data = f.read() # Slurp file
f.seek(0) # Seek back to beginning of file
# Perform all replacements
for orig, repl in zip(ORG, NEW):
data = data.replace(orig, repl)
f.write(data) # Write new data over old
f.truncate() # If replacement shrunk file, truncate extra

You could just do this:
def wiScanFormat(path = "/home/pi/gpsMaster/WiScan.txt"):
# List of tuples with strings to find and strings to replace with
replacestr = [
("Address:", "\nAddress, "),
("ESSID:", "\nESSID, "),
("Frequency:", "\nFrequency, "),
("Quality", "\nQuality, "),
("Signal level", "\nSignal Level, ")
]
with open(path, "r") as file: # Open a file
data = file.read()
formated = data
for i in replacestr: # Loop over each element (tuple) in the list
formated = formated.replace(i[0], i[1]) # Replace the data
with open(path, "w") as file:
written = file.write(formated) # Write the data
return written

Weird characters and deficiency of the attribute. Python

I've created a function and got stuck on it.
Meaning of the function:
User types in a file, number and own name.
Program writes the name at the end of the file 'number' times.
And just prints out contents of the file.
What's the problem?
There are strange characters and a big space under it when program reads the file.
Like this: ਍圀漀爀氀搀眀椀搀攀㬀 ㈀　　㐀 ⴀ 瀀爀攀猀攀渀琀ഀഀ (and then there is a huge space for 10-15 lines in Powershell)
Error: 'str' object has no attribute 'close'.
def filemania():
print "Great! This way is called \"Filemania\""
file_name = raw_input("Type in any text file> ")
enter_1 = int(raw_input("Enter an integer> "))
enter_2 = raw_input("Enter your name> ")
print "Now your name will apear in the file %d times at the end" % enter_1
open_file = open(file_name, 'a+')
listok = []
while len(listok) < enter_1:
open_file.write(enter_2 + " ")
listok.append(enter_2)
print "Contains of the file:"
read_file = open_file.read()
print read_file
file_name.close()
filemania()
I think the problem is somewhere here:
open_file = open(file_name, 'a+')
Does somebody know how to solve these problems?

Firstly you set file_name = raw_input("Type in any text file> ") so you are trying to close a string with file_name.close():
When you write to open_file you move the pointer to the end of the file because you are appending so read_file = open_file.read() is not going to do what you think.
You will need to seek to the start of the file again to print the content, open_file.seek(0).
def filemania():
print "Great! This way is called \"Filemania\""
file_name = raw_input("Type in any text file> ")
enter_1 = int(raw_input("Enter an integer> "))
enter_2 = raw_input("Enter your name> ")
print "Now your name will apear in the file %d times at the end" % enter_1
# with automatically closes your files
with open(file_name, 'a+') as open_file:
listok = []
# use range
for _ in range(enter_1):
open_file.write(enter_2 + " ")
listok.append(enter_2)
print "Contains of the file:"
# move pointer to start of the file again
open_file.seek(0)
read_file = open_file.read()
print read_file
filemania()

For your second error, you are trying to close file_name, which is the raw input string. You mean to close open_file
Try that and report back.

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