My current code is as follows but I cannot figure out how to access a text file (e.g "john.txt")
def read_script():
while True:
try:
filename = input('Please Enter Text Name: ')
F = open (filename, 'r')
script - F.read()
F.close()
slist = script.split()
return slist
except OSError:
print ('Oops! That file does not exist! Try spelling it correctly: ')
def pig_english():
letterlist = [i + i[0] for i in read_script()]
ayList = [i + 'ay' for i in letterlist]
delaylist = [i[1:] for i in aylist]
print (delaylist)
read_script()
pig_english()
you want raw_input() and not input(). input() interprets the user input as an object and not a string.
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 am trying to replace text value as below. I have 2 text file
1 - input.txt
abc = 123
xyz = 456
pqr = 789
2 - content.txt
AAA = abc
XXX = xyz
PPP = pqr
now I need to read the input.txt file and replace value on content.txt file with input.txt values and get the below output file.
3 - new.txt
AAA = 123
XXX = 456
PPP = 789
How can I do this ?
First read the contents of the file into 2 arrays in the following way
file1handle = open('filename1', 'r')
file1 = file1handle.readlines()
file2handle = open('filename2', 'r')
file2 = file2handle.readlines()
file2handle.close()
file2handle.close()
Then iterate over the contents and try finding the match with variable names and assignments and put the values into third array in following way
for item in file1:
name, value = item.split(' = ')
for item2 in file2:
name2, assignment = item2.split(' = ')
#Here we are trying to check which name is to be assigned which value
if assignment == name:
val = name2+'='+value
file3.append(val)
Then write the contents into file in following way
filehandle3 = open('filename3', 'w')
for line in file3:
filehandle3.write(line)
filehandle3.close()
This may help you,
_input = {}
with open('input.txt', 'r') as f:
s = f.read()
_input = dict((a.split(' = ')[0], int(a.split(' = ')[1])) for a in s.split('\n'))
_content = {}
with open('content.txt', 'r') as f:
s = f.read()
_content = dict((a.split(' = ')[0], a.split(' = ')[1]) for a in s.split('\n'))
for key in _content:
_content[key] = _input[_content[key]]
Result:
In [18]: _content
Out[19]: {'AAA': 123, 'PPP': 789, 'XXX': 456}
How about using pandas: It's shorter, easier to read and faster when using large files.
import pandas as pd
import numpy as np
input=pd.read_csv("input.txt",sep="=",header=None,usecols=[1])
content=pd.read_csv("content.txt",sep="=",header=None,usecols=[0])
foo=np.hstack(([content.values,input.values]))
new=pd.DataFrame(foo)
new.to_csv("new.txt",index=False,sep="=",header=None)
import re
class Defs:
def __init__(self, defs_file):
self._defs = {}
with open(defs_file) as df:
line_num = 0
for l in df:
line_num += 1
m = re.match(r'\s*(\w+)\s*=\s*(\S+)\s*', l)
assert m, \
"invalid assignment syntax with \"{}\" at line {}".format(
l.rstrip(), line_num)
self._defs[m.group(1)] = m.group(2)
def __getitem__(self, var):
return self._defs[var]
#property
def dict(self):
return self._defs
class Replacer:
def __init__(self, defs):
self._defs = defs
def replace_with_defs(self, context_file, output_file):
with open(context_file) as context, open(output_file, 'w') as output:
for line in context:
string_repl = re.sub(r'\b(\w+)\b',
lambda m: self._defs.dict.get(m.group(1)) or m.group(1), line)
output.write(string_repl)
def main():
defs = Defs('input.txt')
repl = Replacer(defs)
repl.replace_with_defs('context.txt', 'output.txt')
if __name__ == '__main__':
main()
To describe what's going on above, the Defs class takes a defs_file which is the input.txt assignments and stores them in a dict binding each variable name to the associated value. The Replacer class handles takes a Defs object and uses those to iterate over each line in the context_file i.e. context.txt and replaces any token (assuming the token is a variable name) with the value associated with it, specified within the Defs object, and writes this out to a file output_file i.e. output.txt. If the token doesn't exist in the Defs object as a valid variable name, it defaults to the write the token as is.
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.
Say I have a textfile containing the following:
1:Programming:Adam:0
2:Math:Max:0
3:Engineering:James:0
I am trying to read this textfile as a list, then have a user specify which 0 of a line they want to change to 1, then rewrite the changes made back into textfile.
So for example if a user specifies line 2, I want the 0 in line 2 to be changed to 1 and then save the changes made back onto the textfile.
So far I have the following and I just can't get it to over write it:
class Book_list:
def __init__(self,book_ID,book_title,book_author,availability):
self.book_ID = book_ID
self.book_title = book_title
self.book_author = book_author
self.availability = availability
def __str__(self):
return ('ID: ' + self.book_ID + '\nBook_Title: ' + self.book_title +
'\nBook_author: ' + self.book_author +
'\navailability: ' + self.availability + '\n')
def __getitem__(self,book_ID):
return self.book_ID
def __getitem__(self,availability):
return self.availability
x=str(raw_input('enter line number.'))
with open('database.txt','r') as f:
lines = f.readlines()
library = []
for line in lines:
line = line.strip()
data = line.split(':')
b = Book_list(data[0],data[1],data[2],str(data[3]))
library.append(b)
for i in range (0,len(library)):
if (library[i])[0]==x and (library[i])[3]==0:
(library[i])[3]== '1'
with open('database.txt', 'w') as f:
f.writelines( library )
you can read file and store it in a string. then using split make a list from file:
str='a:b:c'
lst=str.split(':') #lst=['a','b','c']
edit as you like and then join them with .join:
str2=':'.join(lst) #str2='a:b:c'
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