So, I'm trying to answer a coding question. It's supposed to create a random knock knock joke from an external text file, but I can't figure out how to get the joke randomized. It just prints the first joke.
The below is my code:
# Saving filepath to a variable
# makes a smoother transition to the Sandbox
filepath = "KnockKnock.txt"
# When finished copy all code after this line into the Sandbox
# Open the file as read-only
inFile = open(filepath, "r")
# Get the first line and do something with it
line = inFile.readline()
# Write your program below
print("Knock-Knock")
print("Who's there?")
print (line)
print(line + "who?")
line = inFile.readline()
print(line)
line = inFile.readline()
inFile.close()
Any idea how to get a random joke instead of it just doing the first one in the file?
Assuming your file KnockKnock.txt has the jokes in pairs, every other line, then we can read all of the jokes into a list of 2-tuples, containing the setup and punchline.
import random
...
# read in file and make a list of jokes
with open('KnockKnock.txt', 'r') as infile:
# make a list of lines from file
in_lines = infile.readlines()
# pair every line with every other line - setup and punchline
jokes = list(zip(in_lines[0::2], in_lines[1::2]))
# choose a random joke
setup, punchline = random.choice(jokes)
# print the joke
print("Knock-Knock")
print("Who's there?")
print(setup)
print(setup + " who?")
print(punchline)
Related
I currently coding a discord bot which reads a local log file which keeps getting updated. Every time a new line is added and matches a certain pattern the bot (should) post a messages with that content. I tried the following or my current stand is the following code. The current problem with my code is that the file is opened all the time. Is there a way to just read the file if its gets updated since the last reading? or in other words is there a way to realize my solution with a solution which does not need to have the file opened at all times/beeing busy with reading the file consitantly?
while not BOT.is_closed():
for log in logs:
file_path = config["path_to_log"]
logfiles= []
for filename in glob.glob(os.path.join(file_path,f'_{log}*')):
logfiles.append(filename)
latest_file = max(logfiles, key=os.path.getmtime)
""" #second try doenst work if to much content gets added at the same time
with open(latest_file,"rb") as f:
if(len(messagelist)>1000):
messagelist = []
f.seek(-2, os.SEEK_END)
while f.read(1) != b'\n':
f.seek(-2, os.SEEK_CUR)
last_line = f.readline().decode()
for word in words:
if word in last_line and last_line not in messagelist:
messagelist.append(last_line)
print(last_line)
await channel.send(last_line)
else:
time.sleep(1)
"""
# first try it works but i dont think its the best solution
try:
fp = open(latest_file, 'r')
except:
end_program("Error while reading the log file")
for line in (fp.readlines() [-10:]):
new = line
for word in words:
if word in new and new not in messagelist:
messagelist.append(new)
print(new)
await channel.send(new)
else:
time.sleep(1)
###
fp.close()
You could use a generator.
import time, os
def follow(filename):
with open(filename) as f:
f.seek(0, os.SEEK_END)
while True:
line = f.readline()
if not line:
time.sleep(1)
continue
if line.startswith('a'):
yield line
The generator above will yield the lines with a newline character left at the end. You may want to slightly modify yield line to exclude the newline character, say, yield line[:-1]. line.startswith('a') is just an example to show how to yield lines that match a pattern. You will need to update this with your pattern.
In your code, you could use the generator as:
for line in follow('/path/to/file'):
# do something with line
I am trying to edit a specific line of a notepad file using Python 3. I can read from any part of the file and write to the end of it, however whenever I have tried editing a specific line, I am given the error message 'TypeError: 'int' object is not subscriptable'. Does anybody know how I could fix this?
#(This was my first attempt)
f = open('NotepadTester.txt', 'w')
Edit = input('Enter corrected data')
Line = int(input('Which line do you want to edit?'))
f.write(Edit)[Line-1]
f.close()
main()
#(This was my second attempt)
f = open('NotepadTester.txt', 'w')
Line = int(input('Which line do you want to edit?'))
Edit = input('Enter corrected data')
f[Line-1] = (Edit)
main()
you can't directly 'edit' a line in a text file as far as I know. what you could do is read the source file src to a variable data line-by-line, edit the respective line and write the edited variable to another file (or overwrite the input file) dst.
EX:
# load information
with open(src, 'r') as fobj:
data = fobj.readlines() # list with one element for each text file line
# replace line with some new info at index ix
data[ix] = 'some new info\n'
# write updated information
with open(dst, 'w') as fobj:
fobj.writelines(data)
...or nice and short (thanks to Aivar Paalberg for the suggestion), overwriting the input file (using open with r+):
with open(src, 'r+') as fobj:
data = fobj.readlines()
data[ix] = 'some new info\n'
fobj.seek(0) # reset file pointer...
fobj.writelines(data)
You should probably load all the lines into memory first, modify it from there, and then write the whole thing to a file.
f = open('NotepadTester.txt', 'r')
lines = f.readlines()
f.close()
Which_Line = int(input('Which line do you want to edit? '))
Edit = input('Enter corrected data: ')
f = open("NotepadTester.txt",'w')
for i,line in enumerate(lines):
if i == Which_Line:
f.writelines(str(Edit)+"\n")
else:
f.writelines(line)
f.close()
i have a specific function that manipulates text files via input of directory and file name.
The defined function is as below
def nav2xy(target_directory, target_file):
after_rows = f'MOD {target_file}_alines.txt'
after_columns = f'MOD {target_file}_acolumns.txt'
# this segment is used to remove top lines(8 in this case) for work with only the actual data
infile = open(f'{target_directory}/{target_file}', 'r').readlines()
with open(after_rows, 'w') as outfile:
for index, line in enumerate(infile):
if index >= 8:
outfile.write(line)
# this segment removes the necessary columns, in this case leaving only coordinates for gmt use
with open(after_rows) as In, open(after_columns, "w") as Out:
for line in In:
values = line.split()
Out.write(f"{values[4]} {values[5]}\n")
i am searching for a way to run this code once on all files in the chosen directory(could be targeted by name or just do all of them),
should i change the function to use only the file name?
tried running the function this way, to no avail
for i in os.listdir('Geoseas_related_files'):
nav2xy('target_directory', i)
this way works perfectly, although somehow i still get this error with it.
(base) ms-iMac:python gan$ python3 coordinates_fromtxt.py
Traceback (most recent call last):
File "coordinates_fromtxt.py", line 7, in <module>
nav2xy('Geoseas_related_files', str(i))
File "/Users/gadraifman/research/python/GAD_MSC/Nav.py", line 19, in nav2xy
Out.write(f"{values[4]} {values[5]}\n")
IndexError: list index out of range
any help or advice would be a great help,
From what I gather from Iterating through directories with Python, the best way to loop directories is using glob.
I made some extensive other modifications to your code to simplify it and remove the middle step of saving lines to a file just to read them again. If this step is mandatory, then feel free to add it back.
import os, glob
def nav2xy(target_file):
# New file name, just appending stuff.
# "target_file" will contain the path as defined by root_dir + current filename
after_columns = f'{target_file}_acolumns.txt'
with open(target_file, 'r') as infile, open(after_columns, "w") as outfile:
content = infile.readlines()
#
# --- Skip 8 lines here
# |
# v
for line in content[8:]:
# No need to write the lines to a file, just to read them again.
# Process directly
values = line.split()
outfile.write(f"{values[4]} {values[5]}\n")
# I guess this is the dir you want to loop through.
# Maybe an absolute path c:\path\to\files is better.
root_dir = 'Geoseas_related_files/*'
for file_or_dir in glob.iglob(os.path.join(root_dir,"*")):
# Skip directories, if there are any.
if os.path.isfile(file_or_dir):
nav2xy(file_or_dir)
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()
First year Comp Sci student here.
I have an assignment that is asking us to make a simple game using Python, which takes an input file to create the game-world (2D grid). You're then supposed to give movement commands via user input afterwards. My program reads the input file one line at a time to create the world using:
def getFile():
try:
line = input()
except EOFError:
line = EOF
return line
...after which it creates a list to represent the line, with each member being a character in the line, and then creates a list containing each of these lists (amounting to a grid with row and column coordinates).
The thing is, I later need to take input in order to move the character, and I can't do this because it still wants to read the file input, and the last line from the file is an EOF character, causing an error. Specifically the "EOF when reading a line" error.
How can I get around this?
Sounds like you are reading the file directly from stdin -- something like:
python3 my_game.py < game_world.txt
Instead, you need to pass the file name as an argument to your program, that way stdin will still be connected to the console:
python3 my_game.py game_world.txt
and then get_file looks more like:
def getFile(file_name):
with open(file_name) as fh:
for line in fh:
return line
File interaction is python3 goes like this:
# the open keyword opens a file in read-only mode by default
f = open("path/to/file.txt")
# read all the lines in the file and return them in a list
lines = f.readlines()
#or iterate them at the same time
for line in f:
#now get each character from each line
for char_in_line in line:
#do something
#close file
f.close()
line terminator for the file is by default \n
If you want something else you pass it as a parameter to the open method (the newline parameter. Default=None='\n'):
open(file, mode='r', buffering=-1, encoding=None, errors=None, newline=None, closefd=True, opener=None)