python: 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:'. Also look at the last line of the sample output to see how to print the count. You can download the sample data at http://www.py4e.com/code3/mbox-short.txt my code: fname = input("Enter file name: ") if len(fname) < 1: fname = "mbox-short.txt" fh = open(fname) count = 0 print("There were", count, "lines in the file with From as the first word")

python: 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:'. Also look at the last line of the sample output to see how to print the count. You can download the sample data at http://www.py4e.com/code3/mbox-short.txt my code: fname = input("Enter file name: ") if len(fname) < 1: fname = "mbox-short.txt" fh = open(fname) count = 0 print("There were", count, "lines in the file with From as the first word")

EBK JAVA PROGRAMMING

9th Edition

ISBN:9781337671385

Author:FARRELL

Publisher:FARRELL

Chapter13: File Input And Output

Section: Chapter Questions

Problem 6PE

See similar textbooks

Similar questions

### Exercise in Python1 ###\n", "\n", "Open the text oneArt.txt, read the text line by line and, at the end, print the number of lines of text that are in the file. Do not count blank lines."
Write a program to read several lines from a file. For each line, check (recursively) whether it is a palindrome. If it is a palindrome output the original string preceded by an integer (a counter) , like this: 1 : Sore was I, ere I saw Eros.2 : A man, a plan, a canal -- Panama Recall that a palindrome is a String that is the same backwards and forwards. Some examples of single words that are palindromes are: level, madam, racecar Phrases can also be palindromes if you strip out all the whitespace and punctuation and make everything the same case. Some examples are: Madam, I'm Adam A Toyota's a Toyota (See the palindrome video for more) You will need one method to eliminate whitespace and punctuation , make everything lowercase, and return the new string. Use the recursive method you wrote in L15Num2. This returns a string with no whitespace or punctuation, but not all the same case. Then (in main) convert that string to lowercase. You need a recursive method that takes the new…
from Big Java 6th. Edition. Ch.11 P11.12: the capacitor is represented by the equation v(t) = B(1 - e-t/(RC)) Suppose the parameters of the electric circuit are B = 12 volts, R = 500 Ω, and C = 0.25 μF. Consequently v(t) = 12(1 – e-0.008t) where t has units of μs. Read a file params.txt containing the values for B, R, C, and the starting and ending values for t. Write a file rc.txt of values for the time t and the corresponding capacitor voltage v(t), where t goes from the given starting value to the given ending value in 100 steps. In our example, if t goes from 0 to 1000 μs, the twelfth entry in the output file would be: 110.00 7.02261 Make sure that your program catches the FileNotFoundException that can occur if your input file params.txt cannot be found. Your program should catch this exception, and then prompt the user for a file name again until a valid file is entered. I hbelieve I have everything needed, but I cannot figure out how to write in the…
Write an address book program that stores your contacts' names and their email addresses. The names and email addresses are originally stored in a file called phonebook.in, in the format: Harry Potter t..d@hogwarts.edu Hermione Granger b..h@hogwarts.edu Ron Weasley r..b@hogwarts.edu Draco Malfoy m..s@hogwarts.edu Severus Snape h..e@hogwarts.edu Albus Dumbledore a..x@hogwarts.edu Your program should read from the file, storing the names and corresponding email addresses in a dictionary as key-value pairs. Then, the program should display a menu that lets the user enter the numbers 1 through 5, each corresponding to a different menu item: 1) look up an email address 2) add a new name and email address 3) change an email address 4) delete a name and email address 5) save address book and exit When the user enters 1, the program should prompt them for a name, and then print the corresponding email address. If there is no dictionary entry under that name, the program should print, "Sorry,…
Write an R program that reads the text file into a data frame. Using that data frame, print the mean, median, mode, average deviation, and standard deviation. Be sure to state which output is which, such as “The mean is: 25”. Write a Java program that reads the text file. Using meaningful print statements, output the mean, median, mode, and standard deviation. Write a Python program that reads the text file. Using NumPy and SciPy modules, print the mean, median, mode, and standard deviation. Write an R program that: Reads the text file. Using that data, create a two-dimensional array that is 2,500 rows by 100 columns. Also create a three-dimensional array that is 2500 by 10 by 10. Slice the two-dimensional array using a starting column index of 2 and an ending column index of 5. Print the results of the arrays and slice. Write a Java program that: Reads the text file. Using that data, create a two-dimensional array that is 2,500 rows by 100 columns. Slice the two-dimensional array…
Write a python program that prompts the user for their favorite basketball team. It should be able to read the list of teams provided below in a file called favorite_teams.txt and check if their team is in that file. Teams in the file:JazzBullsMavericksSpursIf the team is in the file let the user know that their team is in the list of favorites. If the team is not in the file, add the team to the end of the file. Also, let the user know that their team will be added to the file.Sample Run in File:What is your favorite NBA team? Jazz [Enter]Your team Jazz is in the listFile before and after run: JazzBullsMavericksSpurs Sample Run not in File:What is your favorite NBA team? Pelicans [Enter]Your team Pelicans is not in the list. It will be added.File before run: JazzBullsMavericksSpursFile after run:JazzBullsMavericksSpursPelicans
Design a python program that reads a file named "scores.txt containing lines of test scores separated by commas. Read each line in the file and put each line of scores in a list. Sort the scores in each list in decreasing order and display each list. The contents of "scores.txt" are as follows: 85.6, 92.2, 57.9, 45.7 39.4, 55,6, 99.9, 46.3 98.8, 90.4, 79.3, 66.7
In Python do the following: Write a program that reads a list of temperatures from a file called temps.txt, converts thosetemperatures to Fahrenheit, and writes the results to a file called ftemps.txt
In Python IDLE Write a program that reads the file’s contents and determines the following: The number of uppercase letters in the file The number of lowercase letters in the file The number of digits in the file The number of whitespace characters in the file Then the program should do a mass replacement of all spaces with a ‘-‘, and then replace any uppercase letters with lowercase letters. After the replacement of the spaces, the count of letters, digits, and spaces should be rerun, the number of replacements indicated, and a second report of letters, digits and spaces should be printed. Save the results of the changes in a file named “testoutput.txt”. This file must be submitted as part of the submission for your lab. Output should look like this: Uppercase letters: 20 Lowercase letters: 310 Digits: 4 Spaces: 82 >>> Hint: This program does not need to use any lists – the entire file can be read into one string. Problem 2. Date Printer - Write a program…
Please do this in PYTHON PROGRAMMING Write an address book program that stores your contacts' names and their email addresses. The names and email addresses are originally stored in a file called phonebook.in, in the format:Harry P..d@hogwarts.eduHermione G..h@hogwarts.eduRon W..b@hogwarts.eduDraco M..s@hogwarts.eduSeverus S..e@hogwarts.eduAlbus D..x@hogwarts.eduYour program should read from the file, storing the names and corresponding email addresses in a dictionary as key-value pairs. Then, the program should display a menu that lets the user enter the numbers 1 through 5, each corresponding to a different menu item:1) look up an email address2) add a new name and email address3) change an email address4) delete a name and email address5) save address book and exitWhen the user enters 1, the program should prompt them for a name, and then print the corresponding email address. If there is no dictionary entry under that name, the program should print, "Sorry, no contact exists…
Write a Python program to combine each line from the first file with the corresponding line in the second file and then save it in a 3rd file. Consider, both the files have same number of lines. Assume, each line has a newline(\n) at the end. ========================================================= Example:Input from file 1:HelloHiNice Input from file 2:BadWorseWorst Output in 3rd FIle:Hello BadHi WorseNice Worst ========================================================= Hint(1):Use the write() function what will be the answer of this in python programming language
Write a program that reads a stream of integers from a file and prints to the screen the range of integers in the file (i.e. [lowest, highest]). You should first prompt the user to provide the file name. You should then read all the integers from the file, keeping track of the lowest and highest values seen in the entire file, and only print out the range of values after the entire file has been read. In Java.