As the title says : is there an easy way of merging every two lines of a text file in python? For example my text file looks like this:
fname=xxx
uname=yyy
fname=zzz
uname=ppp
What I want as an output is :
fname=xxx uname=yyy
fname=zzz uname=ppp
and so on. Any help is appreciated!
Instead of printing, you can append these to a text file or a list:
with open("test.txt") as f:
content = f.readlines()
str = ""
for i in xrange(1,len(content)+1):
str += content[i-1].strip()
if i % 2 == 0:
print str
str = ""
or
with open("test.txt") as f:
content = f.readlines()
for i in xrange(1, len(content)+1):
if i % 2 == 0: print content[i-2].strip() + content[i-1].strip()
Here is another solution with sliding window, two lines at a time
with open("test.txt") as f:
data = [x for x in f.read().split("\n") if x.strip() != ""]
for line1, line2 in list(zip(data, data[1:]))[::2]:
print(" ".join([line1, line2]))
This will only work for files with even number of lines
I hope it helps:
import itertools
a =["fname=xxx", "uname=yyy", "fname=zzz", "uname=ppp"]
res = ''
for i in itertools.islice(a, 0, len(a), 2), itertools.islice(a, 1, len(a), 2):
res += ' '.join(i)
res += '\n'
print(res)
output:
fname=xxx fname=zzz
uname=yyy uname=ppp
Related
I am new with python. I am trying to rstrip space, split and append the list into words and than sort by alphabetical order. I don’t what I am doing wrong.
fname = input("Enter file name: ")
fh = open(fname)
lst = list(fh)
for line in lst:
line = line.rstrip()
y = line.split()
i = lst.append()
k = y.sort()
print y
I have been able to fix my code and the expected result output.
This is what I was hoping to code:
name = input('Enter file: ')
handle = open(name, 'r')
wordlist = list()
for line in handle:
words = line.split()
for word in words:
if word in wordlist: continue
wordlist.append(word)
wordlist.sort()
print(wordlist)
If you are using python 2.7, I believe you need to use raw_input() in Python 3.X is correct to use input(). Also, you are not using correctly append(), Append is a method used for lists.
fname = raw_input("Enter filename: ") # Stores the filename given by the user input
fh = open(fname,"r") # Here we are adding 'r' as the file is opened as read mode
lines = fh.readlines() # This will create a list of the lines from the file
# Sort the lines alphabetically
lines.sort()
# Rstrip each line of the lines liss
y = [l.rstrip() for l in lines]
# Print out the result
print y
I want to convert text file contains for example this:
Alex
Gheith
40
John
Stewart
33
into:
[('Alex','Gheith','40'),('John','Stewart','33')]
Current code:
records =[]
f10 = open("PlayerRecords.txt","r")
for line in f10:
line = line.strip()
records.append(line)
t = ()
f10.close()
t = [(x,) for x in records]
print t
Current output:
[('Alex','Gheith',40),('John','Stewart',33)]
Try something like given below. i have taken str1 as multi-line string.
list1 = [line.strip() for line in str1.splitlines()]
l_iter = iter(list1)
mapped = zip(l_iter,l_iter,l_iter)
mapped = set(mapped)
print (mapped)
I have the following code in python 3. I'm trying to read a text file and output a list of numerical values. These values will then be used when searching through a number of pdf invoices.
Here is what I have for the text file portion:
txt_numbers = []
for file in os.listdir(my_path):
if file[-3:] == "txt":
with open(my_path + file, 'r') as txt_file:
txt = txt_file.readlines()
for line in txt:
# get number between quotes
num = re.findall(r'(?<=").*?(?=")', line)
txt_numbers.append(num)
for c, value in enumerate(txt_numbers, 1):
print(c, value)
Here is what is the output:
[[], ['51,500.00'], ['6,000.00'], ['77,000.00'], ['37,000.00']]
Question: How do I remove the "[" from within the list. I would like to have just ['51,500.00', '6,000.00', etc...]
I tried doing new_text_numbers = (", ".join(txt_numbers)) and then print(new_text_numbers)
Problem: I was appending a list with a list, which is allowed in python just not what I wanted.
Added lines:
new_num = (", ".join(num))
txt_numbers.append(new_num)
Solution:
txt_numbers = []
for file in os.listdir(my_path):
if file[-3:] == "txt":
with open(my_path + file, 'r') as txt_file:
txt = txt_file.readlines()
for line in txt:
# get number between quotes
num = re.findall(r'(?<=").*?(?=")', line)
new_num = (", ".join(num))
txt_numbers.append(new_num)
for c, value in enumerate(txt_numbers, 1):
print(c, value)
I am stuck on an exercise from a Coursera Python course, this is the question:
"Open the file mbox-short.txt and read it line by line. When you find a line that starts with 'From ' like the following line:
From stephen.marquard#uct.ac.za Sat Jan 5 09:14:16 2008
You will parse the From line using split() and print out the second word in the line (i.e. the entire address of the person who sent the message). Then print out a count at the end.
Hint: make sure not to include the lines that start with 'From:'.
You can download the sample data at http://www.pythonlearn.com/code/mbox-short.txt"
Here is my code:
fname = raw_input("Enter file name: ")
if len(fname) < 1 : fname = "mbox-short.txt"
fh = open(fname)
count = 0
for line in fh:
words = line.split()
if len(words) > 2 and words[0] == 'From':
print words[1]
count = count + 1
else:
continue
print "There were", count, "lines in the file with From as the first word"`
The output should be a list of emails and the sum of them, but it doesn't work and I don't know why: actually the output is "There were 0 lines in the file with From as the first word"
I used your code and downloaded the file from the link. And I am getting this output:
There were 27 lines in the file with From as the first word
Have you checked if you are downloading the file in the same location as the code file.
fname = input("Enter file name: ")
counter = 0
fh = open(fname)
for line in fh :
line = line.rstrip()
if not line.startswith('From '): continue
words = line.split()
print (words[1])
counter +=1
print ("There were", counter, "lines in the file with From as the first word")
fname = input("Enter file name: ")
fh = open(fname)
count = 0
for line in fh :
if line.startswith('From '): # consider the lines which start from the word "From "
y=line.split() # we split the line into words and store it in a list
print(y[1]) # print the word present at index 1
count=count+1 # increment the count variable
print("There were", count, "lines in the file with From as the first word")
I have written all the comments if anyone faces any difficulty, in case you need help feel free to contact me. This is the easiest code available on internet. Hope you benefit from my answer
fname = input('Enter the file name:')
fh = open(fname)
count = 0
for line in fh:
if line.startswith('From'):
linesplit =line.split()
print(linesplit[1])
count = count +1
fname = input("Enter file name: ")
if len(fname) < 1 : fname = "mbox-short.txt"
fh = open(fname)
count = 0
for i in fh:
i=i.rstrip()
if not i.startswith('From '): continue
word=i.split()
count=count+1
print(word[1])
print("There were", count, "lines in the file with From as the first word")
fname = input("Enter file name: ")
if len(fname) < 1 : fname = "mbox-short.txt"
fh = open(fname)
count = 0
for line in fh:
if line.startswith('From'):
line=line.rstrip()
lt=line.split()
if len(lt)==2:
print(lt[1])
count=count+1
print("There were", count, "lines in the file with From as the first word")
My code looks like this and works as a charm:
fname = input("Enter file name: ")
if len(fname) < 1:
fname = "mbox-short.txt"
fh = open(fname)
count = 0 #initialize the counter to 0 for the start
for line in fh: #iterate the document line by line
words = line.split() #split the lines in words
if not len(words) < 2 and words[0] == "From": #check for lines starting with "From" and if the line is longer than 2 positions
print(words[1]) #print the words on position 1 from the list
count += 1 # count
else:
continue
print("There were", count, "lines in the file with From as the first word")
It is a nice exercise from the course of Dr. Chuck
There is also another way. You can store the found words in a separate empty list and then print out the lenght of the list. It will deliver the same result.
My tested code as follows:
fname = input("Enter file name: ")
if len(fname) < 1:
fname = "mbox-short.txt"
fh = open(fname)
newl = list()
for line in fh:
words = line.split()
if not len(words) < 2 and words[0] == 'From':
newl.append(words[1])
else:
continue
print(*newl, sep = "\n")
print("There were", len(newl), "lines in the file with From as the first word")
I did pass the exercise with it as well. Enjoy and keep the good work. Python is so much fun to me even though i always hated programming.
I have been using multiple code snippets to create a solution that will allow me to write a list of players in a football team to a csv file.
import csv
data = []
string = input("Team Name: ")
fName = string.replace(' ', '') + ".csv"
print("When you have entered all the players, press enter.")
# while loop that will continue allowing entering of players
done = False
while not done:
a = input("Name of player: ")
if a == "":
done = True
else:
string += a + ','
string += input("Age: ") + ','
string += input("Position: ")
print (string)
file = open(fName, 'w')
output = csv.writer(file)
for row in string:
tempRow = row
output.writerow(tempRow)
file.close()
print("Team written to file.")
I would like the exported csv file to look like this:
player1,25,striker
player2,27,midfielder
and so on. However, when I check the exported csv file it looks more like this:
p
l
a
y
e
r
,
2
5
and so on.
Does anyone have an idea of where i'm going wrong?
Many thanks
Karl
Your string is a single string. It is not a list of strings. You are expecting it to be a list of strings when you are doing this:
for row in string:
When you iterate over a string, you are iterating over its characters. Which is why you are seeing a character per line.
Declare a list of strings. And append every string to it like this:
done = False
strings_list = []
while not done:
string = ""
a = input("Name of player: ")
if a == "":
done = True
else:
string += a + ','
string += input("Age: ") + ','
string += input("Position: ") + '\n'
strings_list.append(string)
Now iterate over this strings_list and print to the output file. Since you are putting the delimiter (comma) yourself in the string, you do not need a csv writer.
a_file = open(fName, 'w')
for row in strings_list:
print(row)
a_file.write(row)
a_file.close()
Note:
string is a name of a standard module in Python. It is wise not to use this as a name of any variable in your program. Same goes for your variable file