Python: Attempting to append to file but nothing is being written - python

This section of code should write an input and another variable (Score) to a text file. The program asks for the input (so the if statement is definitely working) and runs without errors, but the text file is empty. Oddly, copying this code to an empty python file and running it works without errors. What is happening here?
if Score > int(HighScores[1]):
print("You beat the record with " + str(Score) + " points!")
Name = input("What is your name?")
BestOf = open("High Scores.txt", "w").close()
BestOf = open("High Scores.txt", "a")
BestOf.write(Name + "\n")
BestOf.write(str(Score))

I didn't close the file after appending.
BestOf.close()
fixed it

Try opening the file in 'w+' mode. This will create the file if it doesn't exist.
You can also check if the file exits using the 'os' module.
import os;
if Score > int(HighScores[1]):
print("You beat the record with " + str(Score) + " points!")
name = input("What is your name?")
if os.path.isfile("Scores.txt"):
fh = open("Scores.txt", "a")
else:
fh = open("Scores.txt", "w+")
fh.write(name + "\n")
fh.write(str(Score))
fh.close()

Related

Is there a way to not delete the user input in a text file after running it again?

Whenever I run this program it will ask for a username and a password, store them as the first values in the two lists, open up a text file, and then write password: and username: then whatever username_Database[0] and password_Database[0] are. The problem is when I run the program again, it deletes the previous values. Is there anyway to save the user input and not have it deleted when I run the program again?
import time
username_Database = []
password_Database = []
username = input("Enter a username\n")
username_Database.append(username)
password = input("Enter a password\n")
password_Database.append(password)
print('You are now registered and your user name is \n' + username_Database[0] + "\n and your password is \n" + password_Database[0] + "\n")
print("Saving...")
filename = open("data.txt", "w")
filename.add("Password: " + str(password_Database[0] + "\n"))
filename.add("Username: " + str(username_Database[0] + "\n"))
time.sleep(2)
exit()
You are using write mode when opening the file, it will overwrite everything inside the file. Change it to append mode.
# Using append mode
filename = open("data.txt", "a")
# It should be write instead of add
filename.write ("Password: " + str(password_Database[0] + "\n"))
filename.write ("Username: " + str(username_Database[0] + "\n"))

Python Use Dictionary List? What Do I Use

I am making a type of quiz, and want to know how to compare the results to a text file. After answering the questions with prompted input, the function will return a four digit code. I want that four digit code to be compared to "truecode" in a text file I've written out with additional information like this:
villagername,personality,birthday,zodiac,truecode,species
Ankha,snooty,September 22nd,Virgo,A420,Cat
Bangle,peppy,August 27th,Virgo,A330,Tiger
Bianca,peppy,December 13th,Sagittarius,A320,Tiger
Bob,lazy,January 1st,Capricorn,A210,Cat
Bud,jock,August 8th,Leo,A310,Lion
I want this other information to be printed out.
print("Your villager is " + villagername)
print("They are a " + personality + " type villagers and of the " + species + " species.")
print("Their birthday is " + birthday + " and they are a " + zodiac)
print("I hope you enjoyed this quiz!")
I cannot figure out how to extract this information and compare it to what I have. Should I use a list or a dictionary? I'm getting frustrated trying to Google my question and wondering if I went around it all wrong.
How do I compare the four digit code (that will be returned from another function) to "true code" and get everything spit out like above?
import csv
def compare_codes(true_code):
with open(''file.txt) as csvfile:
details_dict = csv.reader(csvfile)
for i in details_dict:
if i['truecode'] == tru_code:
print("Your villager is:",i['villagername'])
print("They are a " + i['personality'] + " type villagers and of the " + i['species'] + " species.")
print("Their birthday is " + i['birthday'] + " and they are a " + i['zodiac'])
print("I hope you enjoyed this quiz!")
break
compare_codes('A420')
Above code reads the text file and compares the input with truecode value in your file and displays the info.
import csv
def get_data(filename):
with open(filename) as f:
reader = csv.DictReader(f, delimiter=',')
data = {row['truecode']: row for row in reader}
return data
def main():
filename = 'results.txt'
data = get_data(filename)
code = input('Enter code: ')
try:
info = data[code]
print("Your villager is " + info['villagername'])
print("They are a " + info['personality'] +
" type villagers and of the " + info['species'] + " species.")
print("Their birthday is " +
info['birthday'] + " and they are a " + info['zodiac'])
print("I hope you enjoyed this quiz!")
except KeyError:
print('Invalid code')
if __name__ == "__main__":
main()
The type of file that you have is actually called a CSV file. If you wanted to, you could open your text file with any spreadsheet program, and your data would show up in the appropriate cells. Use the csv module to read your data.
import csv
def get_quiz_results(truecode):
with open('your-text-file.txt') as csvfile:
csvreader = csv.reader(csvfile)
for row in csvreader:
# row is a dictionary of all of the items in that row of your text file.
if row['truecode'] == truecode:
return row
And then to print out the info from your text file
truecode = 'A330'
info = get_quiz_results(truecode)
print("Your villager is " + info["villagername"])
print("They are a " + info["personality"] + " type villagers and of the " + info["species"] + " species.")
print("Their birthday is " + info["birthday"] + " and they are a " + info["zodiac"])
print("I hope you enjoyed this quiz!")
When looping over the file, the csv module will turn each line of the file into a dictionary using the commas as separators. The first line is special, and is used to create the dictionary keys.

Appending to a file error - PYTHON

Please bear with my as I am new to python and am learning by creating simple programs. Recently I started making my own program that generates a file and allows the user to choose things and store them in each file. In this example I was going for a song playlist generator. Although it was difficult I soldiered through until I came across this error that I couldn't fix. It was with the opening of a file.
This is the Code
cont = "0"
log = 0
data = open("songs.txt", "r")
songs = data.readlines()
songs.sort()
while log < 20:
cont = input("Do you want to make a playlist? [Yes or No]")
while cont == "yes":
print ("1. ", songs[0],"2. ", songs[1],"3. ", songs[2],"4. ", songs[3],"5. ", songs[4],"6. ", songs[5],"7. ", songs[6],"8. ", songs[7],"9. ", songs[8],"10. ", songs[9],"11. ", songs[10],"12. ", songs[11],"13. ", songs[12],"14. ", songs[13],"15. ", songs[14],"16. ", songs[15],"17. ", songs[16],"18. ", songs[17],"19. ", songs[18],"20. ", songs[19])
new = "playlist" + str(log) + ".txt"
print(new)
log = log + 1
cont = "no"
choice = int(input("Please enter the first choice of song you would like in your playlist [Type the allocated number please]"))
choice1 = choice - 1
"playlist" + str(log) + ".txt".append(songs[choice1])
However, my code is supposed to allow the user to choose songs from my print function and then add them to the playlist generatored and then repeat this for as many playlists they want. Now my code is giving me an error message.
File "playlists.py", line 18, in <module>
"playlist" + str(log) + ".txt".append(songs[choice1])
AttributeError: 'str' object has no attribute 'append'
What is this Error stating and also how can I overcome it.
Thanks in advance and anticipation!
The issue is that this line:
"playlist" + str(log) + ".txt".append(songs[choice1])
is just super wrong/sort of like pseudocode. To append to a text file requires you open it for appending and then write to it. Do this like so:
with open("playlist" + str(log) + ".txt", "a") as myfile:
myfile.write(str(songs[choice1]))

Python File errors

File = input("Please enter the name for your txt. file: ")
fileName = (File + ".txt")
WRITE = "w"
APPEND = "a"
file = []
name = " "
while name != "DONE" :
name = input("Please enter the guest name (Enter DONE if there is no more names) : ").upper()
fileName.append(name)
fileName.remove("DONE")
print("The guests list in alphabetical order, and it will save in " + fileName + " :")
file.sort()
for U in file :
print(U)
file = open(fileName, mode = WRITE)
file.write(name)
file.close()
print("file written successfully.")
I am just practicing to write the file in Python, but something bad happened.
Here are still some errors about this:
fileName.remove("DONE")
Still showing 'str' error.
filename=filename+name
Use the above code
Python strings are immutable. Therefore you can't use append() on them. Use += instead:
fileName += name
which is shorthand for
fileName = fileName + name
Note how nothing is appended to the string, instead a new one is created and then assigned to fileName.
Try this.
I thought you have some mistaken in variable name.
aFile = input("Please enter the name for your txt. file: ")
fileName = (aFile + ".txt")
WRITE = "w"
APPEND = "a"
file = []
name = " "
while name != "DONE" :
name = input("Please enter the guest name (Enter DONE if there is no more names) : ").upper()
file.append(name)
file.remove("DONE")
print("The guests list in alphabetical order, and it will save in " + fileName + " :")
file.sort()
for U in file :
print(U)
outputfile = open(fileName, mode = WRITE)
outputfile.write(name)
outputfile.close()
print("file written successfully.")
Just right out the bat, you can not append to a toople.
fileName.append(name) #how can you append or remove anything into or from this when it contains toople?
Another thing, I don't know what version of python you are using but, I never seen expression like this
file = open(fileName, mode = WRITE) #this should be something like (file=open(fileName,"w"))
Just overall check your code. Like I said you can not add or remove stuff from a toople; only in lists and dictionaries.
append is the list's method where as fileName declared in your code is treated as string. If your intention is to append the string to file, open the file in "append" mode and write to it:
with open(aFile + ".txt", "a") as f:
f.write("appended text")

trying to open a .txt file but keep getting error message

This is my code to opening the file; I would like it to contain a name and a figure:
file_n = "Class_" + str(num_class) + ".txt"
file = open(file_n,"r")
string = file.read()
file.close()
and this is the error message I keep getting and I can't work out how to fix it:
file = open(file_n,"r")
IOError: [Errno 2] No such file or directory: 'Class_2.txt'
Could someone please tell me why this happening and the solution to it?
im still very confused
this is my whole code:
import random
import json
score = 0
turn = 1
turn = turn + 1
name = raw_input("what is your name?")
num_class = input("What class are you in? (1,2,3)")
print ("hello "+name+" have fun and good luck!")
for turn in range(10):
randnum_1 = random.randint(1,10)
randnum_2 = random.randint(1,10)
operators = ["+", "-", "*"]
operator_picked = operators[random.randint(0,2)]
human_answer = raw_input("What is " + str(randnum_1) +" "+ operator_picked +" " + str(randnum_2) + "?")
correct_answer = str((eval(str(randnum_1) + operator_picked + str(randnum_2))))
if correct_answer == human_answer :
score = score+1
print ("Correct!")
else:
print ("Incorrect!" +"The correct answer is " + str(correct_answer))
print("\nYour score was " + str(score)+ "/10")
file_name = ("Class_" + str(num_class) + ".txt")
file = open(file_n,"r")
string = file.read()
file.close()
dict = {}
Like Kevin and Flavian mentioned the directory of Class_2.txt is most likely not the directory where your script is located.
file_n = "/ActualDirectory/ofFile/Class_" + str(num_class) + ".txt"
Make sure that your Python code lies in the same directory with your txt file.
So it should be like this:
Of course the two files can be in different directories, but then you should provide the relevant, or absolute, path of the txt file to your code.
As 1001010 stated, you could check your current directory by doing:
import os
print(os.getcwd())

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