We Keep Coding

taking input from user and search it in a text file and return the position of that point in the textfile

I am trying to search a string (which is input by the user) in a text file and if the string exist in the text file then it will return it's position (position in the file)
I am using seek and tell methods of text file in python
def search(self,identity):
with open("dbase.txt", 'r') as dbase:
find = dbase.readline()
while str.casefold(find) == str.casefold(identity):
pos = dbase.tell()
find = dbase.readline()
return pos
complete code :
class app:
''' class that takes the data and save it
into a text file name dbase.txt'''
def get_data(self):
self.name = input("Name : ")
self.add = input("Address : ")
self.mob = input("Mobile : ")
def write_data(self):
dbase = open("dbase.txt",'a')
dbase.write(self.name+"\n")
dbase.write(self.add+"\n")
dbase.write(self.mob+"\n")
dbase.close()
def read_data(self,pos):
dbase = open("dbase.txt",'r')
dbase.seek(pos)
self.name = dbase.readline()
self.add = dbase.readline()
self.mob = dbase.readline()
print(self.name)
print(self.add)
print(self.mob)
def search(self,identity):
data = open("dbase.txt", 'r').read()
desired_string = identity
if desired_string in data:
pos = data.find(desired_string)
return pos
else:
print("The desired string does not exist in the file")
call = app()
f = input("Enter :")
pos = call.search(f)
call.read_data(pos)
identity stands for the user input which I passed in this function as a parameter and I want to match this identity in the file and i am extracting file data in a variable find so if find is equals to identity then I want to return it's current position in file but it's not working, I had tried to print something in the while loop such as print("x") or something else to check weather the While Loop condition goes true or not because if it goes true then it will print that "x" but it does not print anything from which I concluded that the while loop condition goes false therefore I am thinking that the fault is in the line.
while str.casefold(find) == str.casefold(identity):
but I am not getting why is it so because the string which I input is actually existing in the file.

data = open("filename.ext", 'r').read().replace("\n", "\n\n")
desired_string = "apples"
if desired_string in data:
index = data.find(desired_string)
else:
print("The desired string does not exist in the file")
The above code will search for the desired string in the file, and if it exists the index of its first occurrence will be stored in the variable index. Otherwise The desired string does not exist in the file will be printed.

Python function not running, interpreter not giving any errors

I'm very new to Python and having a problem with a program I'm doing for a class. main() and create_file work, but when it gets to read_file, the interpreter just sits there. The program is running but nothing is happening.
The answer is probably something very simple, but I just can't see it. Thanks in advance for any help.
I'm using IDLE (Python and IDLE v. 3.5.2)
Here's the code:
import random
FILENAME = "randomNumbers.txt"
def create_file(userNum):
#Create and open the randomNumbers.txt file
randomOutput = open(FILENAME, 'w')
#Generate random numbers and write them to the file
for num in range(userNum):
num = random.randint(1, 500)
randomOutput.write(str(num) + '\n')
#Confirm data written
print("Data written to file.")
#Close the file
randomOutput.close()
def read_file():
#Open the random number file
randomInput = open(FILENAME, 'r')
#Declare variables
entry = randomInput.readline()
count = 0
total = 0
#Check for eof, read in data, and add it
while entry != '':
num = int(entry)
total += num
count += 1
#Print the total and the number of random numbers
print("The total is:", total)
print("The number of random numbers generated and added is:", count)
#Close the file
randomInput.close()
def main():
#Get user data
numGenerate = int(input("Enter the number of random numbers to generate: "))
#Call create_file function
create_file(numGenerate)
#Call read_file function
read_file()
main()

You have an infinite while loop in the function, since entry never changes during the loop.
The Pythonic way to process all the lines in a file is like this:
for entry in randomInput:
num = int(entry)
total += num
count += 1

Issue with creating new file

I'm trying to make a new file at the end of a program to append info into, however the file isn't being created for some reason (the place in my code to look at is the #curve area). My best guess is that the variable "filename" established at the beginning of the program, isn't carrying all the way down to where I establish the new file name. My code is as follows:
import statistics
# input
filename = input("Enter a class to grade: ")
try:
# open file name
open(filename+".txt", "r")
print("Succesfully opened", filename,".txt", sep='')
print("**** ANALYZING ****")
with open(filename+".txt", 'r') as f:
counter1 = 0
counter2 = 0
right = 0
answerkey = "B,A,D,D,C,B,D,A,C,C,D,B,A,B,A,C,B,D,A,C,A,A,B,D,D"
a = []
# validating files
for line in f:
if len(line.split(',')) !=26:
print("Invalid line of data: does not contain exactly 26 values:")
print(line)
counter2 += 1
counter1 -= 1
if line.split(",")[0][1:9].isdigit() != True:
print("Invalid line of data: wrong N#:")
print(line)
counter2 += 1
counter1 -= 1
if len(line.split(",")[0]) != 9:
print("Invalid line of data: wrong N#:")
print(line)
counter2 += 1
counter1 -= 1
counter1 += 1
#grading students
score = len(([x for x in zip(answerkey.split(","), line.split(",")[1:]) if x[0] != x[1]]))
score1 = 26 - score
score2 = score1 / 26
score3 = score2 * 100
a.append(score3)
sscore3 = str(score3)
# results file
results = open(filename+"_grades.txt", "a")
results.write(line.split(",")[0])
results.write(",")
results.write(sscore3[:2])
results.write("\n")
results.close()
# in case of no errors
if counter2 == 0:
print("No errors found!")
# calculating
number = len(a)
sum1 = sum(a)
max1 = max(a)
min1 = min(a)
range1 = max1 - min1
av = sum1/number
# turn to int
av1 = int(av)
max2 = int(max1)
min2 = int(min1)
range2 = int(range1)
# median
sort1 = sorted(a)
number2 = number / 2
number2i = int(number2)
median = a[number2i]
median1 = int(median)
# mode
from statistics import mode
mode = mode(sort1)
imode = int(mode)
# printing
print ("**** REPORT ****")
print ("Total valid lines of data:", counter1)
print ("Total invalid lines of data:", counter2)
print ("Mean (average) score:", av1)
print ("Highest score:", max2)
print("Lowest score:", min2)
print("Range of scores:", range2)
print("Median Score:", median1)
print("Mode score(s):", imode)
# curve
part = input("Would you like to apply a curve to the scores? (y)es or (n)o?")
if part == "y":
newmean = input("Enter desired mean score:")
part1 = newmean - av1
part2 = sscore3 + part1
results = open(filename+"_grades_with_curve.txt", "a")
results.write(line.split(",")[0])
results.write(",")
results.write(sscore3[:2])
results.write(",")
results.write(part2)
results.write("\n")
results.close()
except:
print("File cannot be found.")
and It skips to the except block when I enter "y" at the end to try and create the new list, meaning the issue is within creating this new list.

The code is too long and requires reorganization.
It is likely, there are other problems with your code and you are trying to fix wrong one.
Few hints:
Do not open file without assigning the file object to a variable
open(filename+".txt", "r")
You open the file and have no chance to close it as you ignore the returned
file object.
Use with block to open/close your files
with open(input_fname, 'r'):
# work with the file
Learn doing so everywhere.
Do not reopen file for writing results
Your code repeatedly opens the result file (in "a" mode). You have better opening it only once.
You may even open multiple files within one context block:
with open(input_fname, 'r') as f, open(output_fname, "a") as results:
# work with the files
Reuse once calculated result
In many places you split the line: line.split(",").
You shall put the result into variable and reuse it.
rec = line.split(",")
Never ignore exceptions!!! (most serious problem)
The final block is catching all exceptions without giving you any sign, what went wrong (or even
worse, it tells you probably wrong information that the file was not found).
So instead of:
try:
# some code
except:
print("File not found.")
at least reraise the exception to learn from it:
try:
# some code
except:
print("File not found.") # this is probably to be removed as misleading message
raise
In fact, you can completely ignore complete top level try - except block and let the exception show
up telling you what went wrong.
Split your code into smaller chunks.
Having the code split to smaller functions shall simplify debugging and usage

Difficulties with an unruly program

I have been working on this code for a couple of hours now, and I am rather unsure what the problem is.
import random#imports random
import os#Imports os
print("Welcome to the maths quiz") # Welcomes user to quiz
score = (0)
def details():
plr_name = input ("Please Input Name:") # Asks user for name
plr_class = input("Input class number: ") # Asks the user for class numer
return (plr_name, plr_class)
def Q():
while qno < 10: # loops while qno is under 10
ran_num1 = random.randint(1,99) # Generates the first random number
ran_num2 = random.randint(1,99) # Generates the second random number
ran_fun = random.choice("X-+") # Picks a random function
print(ran_num1,ran_fun,ran_num2,"=") # Prints the Sum for the user
if ran_fun == "X":
sum_ans = ran_num1 * ran_num2 # Does the sum if it is a multiplication
if ran_fun == "+":
sum_ans = ran_num1 + ran_num2 # Does the sum if it is a addition
if ran_fun == "-":
sum_ans = ran_num1 - ran_num2 # Does the sum if it is a subtraction
plr_ans = int(input()) # Gets the user's answer
if plr_ans == sum_ans:
print("Correct!") # Prints correct
score = score + 1 # Adds 1 to score
else:
print("Incorrect!")
qno = qno + 1 # Adds 1 to qno
def plr_list_make(lines, listoreder):
index = 0
plr_names =[]
plr_scores =[]
for line in lines:
if listorder == 1:
column =0
rev = False
else:
column = 1
rev = True
return sorted(zip(plr_names, plr_scores),key = lambda x:(x[column]),reverse = rev)
def fileUP(plr_name, score, line ):
found = False
index = 0
for line in lines:
if line.startswith(plr_name):
line = line.strip("\n") + ","+str(score+"\n")
lines[index] = line
found = True
index = index + 1
if not found:
lines.append(plr_name+"|" +str(score)+"\n")
return lines
def save (plr_name, plr_class, score):
filename = "QuizScore_"+plr_class+".txt"
try:
fileI = open(filename)
except IOError:
fileI = open(filename, "w+")
fileI = open(filename)
lines = fileI.readlines()
fileI.close
lines = FileUP(plr_name, score, lines)
fileO = open(filename, "w")
fileO.writelines(lines)
fileO.close
def disp_list(): ## intialise_list
student_list=[]
filename = "QuizScore_"+plr_class+".txt"
try:
## open file read into list "lines"
input_file = open(filename)
lines = input_file.readlines() ## read file into list "lines"
input_file.close
student_list = create_student_list(lines, listorder) ### update "lines" with student list as requested by user
## output sorted list
for counter in range(len(student_list)):
print ("Name and Score: ", student_list[counter][0], student_list[counter][1])
except IOError:
print ("no class file!!!")
def menu():
print ("1 Test")
print ("2 Alphabetical")
print ("3 Highscore")
print ("4 Avg Score")
def Run():
selection = 0
while selection != 5:
menu()
option = int(input("Please select option: "))
if option == 1:
name, plr_class = details()
save(name, plr_class, Q())
else:
plr_class = input("input class ")
disp_list(plr_class, option-1)
Run()
Errors:
Traceback (most recent call last):
File "C:\Users\user\Documents\CharlieStockham\cgsca\ca2.py", line 117, in
Run()
File "C:\Users\user\Documents\CharlieStockham\cgsca\ca2.py", line 113, in Run
save(name, plr_class, Q())
File "C:\Users\user\Documents\CharlieStockham\cgsca\ca2.py", line 74, in save
lines = FileUP(plr_name, score, lines)
NameError: global name 'FileUP' is not defined

Line 110:
name, plr_class = details()
But the details function does not return anything - so Python tries to assign the default return value None to the tuple name, plr_class. It can't do this, because None is not an iterable (you can't assign two things to it). To fix it, add the following line to your details function:
return (plr_name, plr_class)
(I haven't tested this.)

I like your game but it's buggy as a mofo :P
score and qno aren't properly defined. Define them in the functions that need them, define them globally or pass them to the relevant functions as arguments.
details() doesn't return anything but you still attempt to use its output to define two other variables. Add return (plr_name, plr_class) to details()
Every time you cast user input to int without checking its value, your program will crash if an int can't be cast. This applies here:
option = int(input("Please select option: "))
here
plr_ans = int(input())#Gets the user's answer
and elsewhere.
Since your program is input-heavy you could make a a function to which you pass the expected datatype and an optional string to display to the user. This way you wouldn't have to write try/except 10 times and your program wouldn't crash on unexpected input.
In def fileUP(plr_name, score, line ): you have for line in lines: but lines isn't defined. Thus, the save() function that calls FileUP() also fails. Also, FileUP and fileUP are not the same thing. You call the function with a capital "f" but the defintion of the function calls it fileUP with a lower case "f".
While we're at it, the file handling in def save (plr_name, plr_class, score):looks weird. The standard way of opening files for simple reading and writing in Python is via with open().
disp_list() should take one or two arguments but it doesn't at the moment so this error is raised:
TypeError: disp_list() takes 0 positional arguments but 2 were given
These 2 positional arguments were given here:
disp_list(plr_class, option-1)

Input and Output program for python

So I have a question that requires this The features : color,size,flesh and class are separated by spaces. Write a Python program that asks the user for the names of the input file (in this case animals.txt) and the output file (any name). The program reads in the lines of the input file, ignores comment lines (lines starting with #) and blank lines and computes and prints the answers to the following questions:
Total number of animals?
Total number of dangerous animals?
Number of large animals that are safe?
Number of animals that are brown and dangerous?
Number of safe animals with red color or hard flesh?
So I finished the program and everything seems to be working but so far when I enter the code and initiate the program, everything works, no errors, nothing but no output file gets generated. I don't know what is wrong exactly but if someone could point me in the right direction it would be highly appreciated.
import os.path
endofprogram = False
try:
filename1 = input("Enter the name of input file: ")
filename2 = input("Enter the name of output file: ")
while os.path.isfile(filename2):
filename2 = input("File Exists! Enter new name for output file: ")
infile = open(filename1, 'r')
ofile = open(filename2, "w")
except IOError:
print("Error reading file! Program ends here")
endofprogram = True
if (endofprogram == False):
alist = []
blist = []
clist = []
largesafe = 0
dangerous = 0
browndangerous = 0
redhard = 0
for line in infile:
line = line.strip("\n")
if (line != " ") and (line[0] != "#"):
colour, size, flesh, clas = line.split('\t')
alist = alist.append(colour)
animals = alist.count()
while clas == "dangerous":
dangerous = dangerous + 1
while size == "large" and clas == "safe":
largesafe = largesafe + 1
while colour == "brown" and clas == "dangerous":
browndangerous = browndangerous + 1
while colour == "red" and flesh == "hard":
redhard = redhard + 1
ofile.write(print("Animals = \n", animals))
ofile.write(print("Dangerous = \n", dangerous))
ofile.write(print("Brown and dangerous = \n", browndangerous))
ofile.write(print("Large and safe = \n", largesafe))
ofile.write(print("Safe and red color or hard flesh= \n", redhard))
infile.close()
ofile.close()

Your indentation has completely messed the program up. The biggest offender is this section:
except IOError:
print("Error reading file! Program ends here")
endofprogram = True
if (endofprogram == False):
The if line will only ever be executed right after the endofprogram = True line, at which point endofprogram == False will be false, and so nothing in the if block — which include the rest of the program — will be executed. You need to dedent everything from the if onwards by one level.

Maybe you can remove the print inside ofile.write
ofile.write(print("Animals = \n", animals))
to
ofile.write("Animals = \n" + str(animals))