Is anyone able to trouble shoot and provide an explanation for the following apparent file handling errors in this code:
Full Code listing on Trinket
https://trinket.io/python/075581aa4f
Using the following test data:
Type in a number (1-7): 2
Add Name and Number
Name: misscomputing
Number: 07373747273
Type in a number (1-7): 6
Filename to save: numbers.txt
The following error results:
IOError: File not open for writing on line 74 in main.py
Furthermore, option 5 which is loading the file does not work either.
Type in a number (1-7): 2
Add Name and Number
Name: misscomputing
Number: 03030483
Type in a number (1-7): 5
Filename to load: numbers.txt
Error
ValueError: need more than 1 values to unpack on line 71 in main.py
The two relevant functions are:
def load_numbers(numbers, filename):
in_file = open(filename, "rt")
while True:
in_line = in_file.readline()
if not in_line:
break
in_line = in_line[:-1]
name, number = in_line.split(",")
numbers[name] = number
in_file.close()
def save_numbers(numbers, filename):
out_file = open(filename, "wt")
for k, v in numbers.items():
out_file.write(k + "," + v + "\n")
out_file.close()
..but as mentioned the full code listing is here: https://trinket.io/python/075581aa4f
The examples are taken from the tutorial on https://en.wikibooks.org
Related
Also is it the correct code which works to fetch a string in file & get all lines containing the string along with line numbers
am getting syntax error in line 1 for the code,
def matched_lines('sam.txt', string_to_search):
matched_lines = search_string_in_file('sam.txt','is')
"""Search for the given string in file and return lines containing that string,
along with line numbers"""
line_number = 0
list_of_results = []
# Open the file in read only mode
with open('sam.txt', 'r') as matched_lines:
print('Total Matched lines : ', len(matched_lines))
# Read all lines in the file one by one
for elem in matched_lines:
print('Line Number = ', elem[0], ' :: Line = ', elem[1])
please help me.
Is this result needed?
def matched_lines(filename, string_to_search):
list_of_results = []
with open(filename, encoding='utf8')as matched_lines:
for elem in enumerate(matched_lines.read().split('\n')):
if string_to_search in elem[1]:
list_of_results.append(elem)
return list_of_results
result = matched_lines('some.txt', 'lorem')
print('Total Matched lines :', len(result))
print(result)
i am trying to write a script that compares a bunch of files based on a search word, in this case i searched for 106, then i want the code to match the words from file 1 to the words in file 2 and print a list with the ones that dont match.
For example in file A i have this line
106_LB01_GP61_HAL;LB01;10892;DIGITAL;0;0;0;0;;;Smutsigt tilluftsfilter;;
and in file B i have
"Prefix": "106_LB01_GP61",
those lines match and then i want it to ignore that tag
when the script find lines that dont match etc when a tag in file A cant fint its buddy in file B i want it to write those tags to a file,
for example:
Total unused tags:1
106_LB01_GP61
right now i am stuc at making it read to diffrent files at the same time
#!/usr/bin/env python
#Import os module
import os
# Ask the user to enter string to search
search_path = (".")
file_type = (".wpp")
search_str = input("Enter searchword: ")
resultsFile = "results.csv"
file_name = ("results.csv")
# Append a directory separator if not already present
if not (search_path.endswith("/") or search_path.endswith("\\") ):
search_path = search_path + "/"
# If path does not exist, set search path to current directory
if not os.path.exists(search_path):
search_path ="."
0
# Repeat for each file in the directory
for fname in os.listdir(path=search_path):
# Apply file type filter
if fname.endswith(file_type):
# Open file for reading
fo = open(search_path + fname)
# Read the first line from the file
line = fo.readline()
# Initialize counter for line number
line_no = 1
# Loop until EOF
wf = open(search_path + resultsFile, 'a')
while line != '' :
# Search for string in line
index = line.find(search_str)
if ( index != -1) :
print(fname, "[", line_no, ",", index, "] ", line, sep="")
wf.write(line + " ")
# Read next line
line = fo.readline()
# Increment line counter
line_no += 1
# Close the files
fo.close()
def check_if_string_in_file(file_name, string_to_search):
""" Check if any line in the file contains given string """
# Open the file in read only mode
with open(file_name, 'r') as read_obj:
# Read all lines in the file one by one
for line in read_obj:
# For each line, check if line contains the string
if string_to_search in line:
return True
return False
def check_if_string_in_file(file_name2, string_to_search):
""" Check if any line in the file contains given string """
# Open the file in read only mode
with open(file_name2, 'r') as read_obj:
# Read all lines in the file one by one
for line in read_obj:
# For each line, check if line contains the string
if string_to_search in line:
return True
return False
def search_string_in_file(file_name, string_to_search):
"""Search for the given string in file and return lines containing that string,
along with line numbers"""
line_number = 0
list_of_results = []
# Open the file in read only mode
with open(file_name, 'r') as read_obj:
# Read all lines in the file one by one
for line in read_obj:
# For each line, check if line contains the string
line_number += 1
if string_to_search in line:
# If yes, then add the line number & line as a tuple in the list
list_of_results.append((line_number, line.rstrip()))
# Return list of tuples containing line numbers and lines where string is found
return list_of_results
def search_multiple_strings_in_file(file_name, list_of_strings):
"""Get line from the file along with line numbers, which contains any string from the list"""
line_number = 0
list_of_results = []
# Open the file in read only mode
with open(file_name, 'r') as read_obj:
# Read all lines in the file one by one
for line in read_obj:
line_number += 1
# For each line, check if line contains any string from the list of strings
for string_to_search in list_of_strings:
if string_to_search in line:
# If any string is found in line, then append that line along with line number in list
list_of_results.append((string_to_search, line_number, line.rstrip()))
# Return list of tuples containing matched string, line numbers and lines where string is found
return list_of_results
def main():
print('*** Loading *** ')
matched_lines = search_string_in_file(file_name, search_str)
for elem in matched_lines:
print('Line Number = ', elem[0], ' :: Line = ', elem[1])
# search for given strings in the file 'sample.txt'
matched_lines = search_multiple_strings_in_file(file_name, [search_str])
print('*** Checking if', [search_str], 'exists in a file *** ')
print('Total Matched lines : ', len(matched_lines))
# Check if string 'is' is found in file 'sample.txt'
if check_if_string_in_file(file_name, search_str):
print('Yes, string found in file')
else:
print('String not found in file')
if __name__ == '__main__':
main()
I want to split the file into multiple files if file size of file_write is greater than 20MB.
In Random function, I am opening big_file.txt and removing noise using remove_noise() and writing clean line to outfile.
I am not sure how to split the file based on the size in my current implementation. Please find the code below:
(Apologies for not providing proper implementation with example because it is really complicated)
I have gone through the example at this link: Split large text file(around 50GB) into multiple files
import os
def parses(lines, my_date_list):
for line in reversed(list(lines)):
line = line.strip()
if not line:
continue
date_string = "2019-11-01" # assumption
yield date_string, line
def remove_noise(line):
""" dummy function"""
return line
def random_function(path, output, cutoff="2019-10-31"):
my_date_list = []
if os.path.exists(path):
with open(path) as f:
lines = parses(f, my_date_list)
for date, line in lines:
if cutoff <= date:
results = remove_noise(line)
output.write(results + '\n')
continue
else:
break
While writing lines to output, I need to check size. If size reached 20MB and I want to write it to second {may be output_2} and so on.
if __name__ == '__main__':
path = "./big_file.txt"
file_write = "./write_file.txt"
with open(file_write) as outfile:
random_function(path=path, output=outfile)
I have to write a program that prompts the user to enter six test names and their scores and writes them to a text file named tests.txt. You must use a loop. Each input should be written to its own line in the file. The program should generate a confirmation message when done. When I run my program it works but then I get an error at the end saying:
Traceback (most recent call last):
File "C:/Users/brittmoe09/Desktop/program6_1.py", line 34, in <module>
main()
File "C:/Users/brittmoe09/Desktop/program6_1.py", line 18, in main
test_scores.write(name + '\n')
ValueError: I/O operation on closed file.
I am not sure what I am doing wrong, any help would be appreciated.
Here is my code:
def main():
test_scores = open('tests.txt', 'w')
print('Entering six tests and scores')
for count in range(6):
name = input('Enter a test name')
score = int(input('Enter % score on this test'))
while name != '':
test_scores.write(name + '\n')
test_scores.write(str(score) + '\n')
test_scores.close()
print('File was created successfully')
main()
Here's what I did. Get rid of that 2nd while loop, and move the close file out of the for loop because you are closing the file in the loop which is giving you the error: (some of my variable names are different than yours so look out for that)
test_scores = open('tests.txt','w')#open txt file
print('Entering six tests and scores')
for count in range(6):#for loop to ask the user 6 times
name = input('Enter a test name: ')
testscore = int(input('Enter % score on this test: '))
for count2 in range(1):
test_scores.write(str(name) + '\n')
test_scores.write(str(testscore) + '\n')
test_scores.close()#close the txt file
print('File was created successfully!')
the block while:
while name != '':
...
This is an infinity loop if your "name" != '', so in first loop the file closed and second loop you get an error
Having trouble on my code.
I am getting this AttributeError and i don't know why.
Someone provide a little insight please and thanks!!!
This is written in python 3,
i am attempting to make a chart.
import sys
data = {}
def main():
filename = sys.argv[1]
parseFile(filename)
function()
def parseFile(fn):
print("Parsing", fn)
infile = open(fn, "r")
for line in infile:
line = line[:-1]
tokens = line.split()
print(tokens)
if line[0]=="#":
line.readline() #<-- this is my problem line
rsid = (tokens[0])
genotype = (tokens[3])
data[rsid] = genotype
infile.close()
main()
# This data file generated by 23andMe at: Wed Jan 26 05:37:08 2011
#
# Below is a text version of your data. Fields are TAB-separated
# Each line corresponds to a single SNP. For each SNP, we provide its identifier
# (an rsid or an internal id), its location on the reference human genome, and the
# genotype call oriented with respect to the plus strand on the human reference
# sequence. We are using reference human assembly build 36. Note that it is possible
# that data downloaded at different times may be different due to ongoing improvements
# in our ability to call genotypes. More information about these changes can be found at:
# https://www.23andme.com/you/download/revisions/
#
# More information on reference human assembly build 36:
# http://www.ncbi.nlm.nih.gov/projects/mapview/map_search.cgi?taxid=9606&build=36
#
# rsid chromosome position genotype
rs4477212 1 72017 AA
rs3094315 1 742429 AA
rs1799883 1 742429 AA
rs3131972 1 742584 GG
rs12124819 1 766409 AA
rs11240777 1 788822 GG
rs6681049 1 789870 CC
rs4970383 1 828418 CC
rs4475691 1 836671 CC
rs7537756 1 844113 AA
the attribute error means that readline is not a string method.
in this snippet:
for line in infile:
line = line[:-1]
tokens = line.split()
I am guessing (correctly?) that line[:-1] is to strip off a line feed. If that is the case, try this instead:
for line in infile:
line = line.strip()
tokens = line.split()
strip will strip off new-line and carriage returns. and since you've just altered line to be just the text without the line-feed, you can delete your line with line.readline().
Update:
to skip lines beginning with #
for line in infile:
line = line.strip()
if line[0]=="#":
continue
tokens = line.split()
by "skip", I take it to mean that you want to ignore them.
also, for good form, you should have in your parseFile function the line:
def parseFile(fn):
global data
...