Mylab Programming With Pearson Etext -- Access Code Card -- For Starting Out With Python
3rd Edition
ISBN: 9780133759112
Author: Tony Gaddis
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 9, Problem 11AW
Assume the variable dct references a dictionary. Write code that pickles the dictionary and saves it to a file named mydata.dat.
Expert Solution & Answer
Learn your wayIncludes step-by-step video
schedule03:23
Students have asked these similar questions
Code in python.
Assume the variable dct references a dictionary. Write code that pickles the dictionary and saves it to a file named mydata.dat.
def import_and_create_bank(filename): ''' This function is used to create a bank dictionary. The given argument is the filename to load. Every line in the file should be in the following format: key: value The key is a user's name and the value is an amount to update the user's bank account with. The value should be a number, however, it is possible that there is no value or that the value is an invalid number.
What you will do: - Create an empty bank dictionary. - Read in the file. - Add keys and values to the dictionary from the contents of the file. - If the key doesn't exist in the dictionary, create a new key:value pair. - If the key does exist in the dictionary, increment its value with the amount. - You should also handle the following cases: -- When the value is missing or invalid. If so, ignore that line and don't update the dictionary. -- When the line is completely blank. Again, ignore that line and don't update the…
#program should be wrote in python with comments please.
Write a program that reads the contents of a text file.
The program should create a dictio-nary in which the keys are the individual words found in the file and the values are the number of times each word appears.
For example, if the word “the” appears 128 times, the dictionary would contain an element with 'the' as the key and 128 as the value.
The program should either display the frequency of each word or create a second file containing a list of each word and its frequency.
Chapter 9 Solutions
Mylab Programming With Pearson Etext -- Access Code Card -- For Starting Out With Python
Ch. 9.1 - An element in a dictionary has two parts. What are...Ch. 9.1 - Which part of a dictionary element must be...Ch. 9.1 - Suppose ' start' : 1472 is an element in a...Ch. 9.1 - Suppose a dictionary named employee has been...Ch. 9.1 - What will the following code display? stuff = {1 :...Ch. 9.1 - Prob. 6CPCh. 9.1 - Suppose a dictionary named inventory exists. What...Ch. 9.1 - What will the following code display? stuff = {1 :...Ch. 9.1 - What will the following code display? stuff = {1 :...Ch. 9.1 - What is the difference between the dictionary...
Ch. 9.1 - Prob. 11CPCh. 9.1 - Prob. 12CPCh. 9.1 - What does the values method return?Ch. 9.2 - Prob. 14CPCh. 9.2 - Prob. 15CPCh. 9.2 - Prob. 16CPCh. 9.2 - After the following statement executes, what...Ch. 9.2 - After the following statement executes, what...Ch. 9.2 - After the following statement executes, what...Ch. 9.2 - After the following statement executes, what...Ch. 9.2 - After the following statement executes, what...Ch. 9.2 - Prob. 22CPCh. 9.2 - After the following statement executes, what...Ch. 9.2 - After the following statement executes, what...Ch. 9.2 - Prob. 25CPCh. 9.2 - Prob. 26CPCh. 9.2 - After the following code executes, what elements...Ch. 9.2 - Prob. 28CPCh. 9.2 - After the following code executes, what elements...Ch. 9.2 - After the following code executes, what elements...Ch. 9.2 - After the following code executes, what elements...Ch. 9.2 - Prob. 32CPCh. 9.3 - Prob. 33CPCh. 9.3 - When you open a file for the purpose of saving a...Ch. 9.3 - When you open a file for the purpose of retrieving...Ch. 9.3 - Prob. 36CPCh. 9.3 - Prob. 37CPCh. 9.3 - Prob. 38CPCh. 9 - You can use the __________ operator to determine...Ch. 9 - You use ________ to delete an element from a...Ch. 9 - The ________ function returns the number of...Ch. 9 - You can use_________ to create an empty...Ch. 9 - The _______ method returns a randomly selected...Ch. 9 - The __________ method returns the value associated...Ch. 9 - The __________ dictionary method returns the value...Ch. 9 - The ________ method returns all of a dictionary's...Ch. 9 - The following function returns the number of...Ch. 9 - Prob. 10MCCh. 9 - Prob. 11MCCh. 9 - This set method removes an element, but does not...Ch. 9 - Prob. 13MCCh. 9 - Prob. 14MCCh. 9 - This operator can be used to find the difference...Ch. 9 - Prob. 16MCCh. 9 - Prob. 17MCCh. 9 - The keys in a dictionary must be mutable objects.Ch. 9 - Dictionaries are not sequences.Ch. 9 - Prob. 3TFCh. 9 - Prob. 4TFCh. 9 - The dictionary method popitem does not raise an...Ch. 9 - The following statement creates an empty...Ch. 9 - Prob. 7TFCh. 9 - Prob. 8TFCh. 9 - Prob. 9TFCh. 9 - Prob. 10TFCh. 9 - What will the following code display? dct =...Ch. 9 - What will the following code display? dct =...Ch. 9 - What will the following code display? dct =...Ch. 9 - What will the following code display? stuff =...Ch. 9 - How do you delete an element from a dictionary?Ch. 9 - How do you determine the number of elements that...Ch. 9 - Prob. 7SACh. 9 - What values will the following code display? (Dont...Ch. 9 - After the following statement executes, what...Ch. 9 - After the following statement executes, what...Ch. 9 - After the following statement executes, what...Ch. 9 - After the following statement executes, what...Ch. 9 - After the following statement executes, what...Ch. 9 - What will the following code display? myset =...Ch. 9 - After the following code executes, what elements...Ch. 9 - Prob. 16SACh. 9 - Prob. 17SACh. 9 - Prob. 18SACh. 9 - After the following code executes, what elements...Ch. 9 - Prob. 20SACh. 9 - Write a statement that creates a dictionary...Ch. 9 - Write a statement that creates an empty...Ch. 9 - Assume the variable dct references a dictionary....Ch. 9 - Assume the variable dct references a dictionary....Ch. 9 - Prob. 5AWCh. 9 - Prob. 6AWCh. 9 - Prob. 7AWCh. 9 - Prob. 8AWCh. 9 - Prob. 9AWCh. 9 - Prob. 10AWCh. 9 - Assume the variable dct references a dictionary....Ch. 9 - Write code that retrieves and unpickles the...Ch. 9 - Course information Write a program that creates a...Ch. 9 - Capital Quiz The Capital Quiz Problem Write a...Ch. 9 - File Encryption and Decryption Write a program...Ch. 9 - Unique Words Write a program that opens a...Ch. 9 - Prob. 5PECh. 9 - File Analysis Write a program that reads the...Ch. 9 - World Series Winners In this chapters source code...Ch. 9 - Name and Email Addresses Write a program that...Ch. 9 - Blackjack Simulation Previously in this chapter...
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
For each of the following activities, give a PEAS description of the task environment and characterize it in te...
Artificial Intelligence: A Modern Approach
Write a program that takes its input from a file of numbers of type double. The program outputs to the screen t...
Problem Solving with C++ (9th Edition)
What output will be produced by the following code?
Java: An Introduction to Problem Solving and Programming (7th Edition)
Describe the difference between making a class a member of another class (object composition) and making a clas...
Starting Out with C++: Early Objects (9th Edition)
How can you initialize an array of a class type with references to objects of the class?
Starting out with Visual C# (4th Edition)
Why is the study of database technology important?
Database Concepts (8th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- Complete the below function that takes a file name and a list as arguments andreads the text within the corresponding file, then creates a dictionary whosekeys are the characters of the provided list, and the values are the counts ofthese characters within the text. If a character in the list is not included in the text, "0" should be written in the dictionary as the value of this character. The function returns the created dictionary as a result. If the file does not exist, then the function returns an empty dictionary. Here is an example case, assuming a file named "sample.txt" exists with the following content: ----- sample.txt -----This is an example sentence.This is yet another sentence.------------------------- >>> text2dict("sample.txt", ['a', 'b', 'c', 't']){'a':3, 'b':0, 'c':2, 't':4} """ def text2dict(filename, characters):return # Remove this line to answer this questionarrow_forwardComplete the below function that takes a file name and a list as arguments andreads the text within the corresponding file, then creates a dictionary whosekeys are the characters of the provided list, and the values are the counts ofthese characters within the text. If a character in the list is not included in the text, "0" should be written in the dictionary as the value of this character. The function returns the created dictionary as a result. If the file does not exist, then the function returns an empty dictionary. Here is an example case, assuming a file named "sample.txt" exists with the following content: ----- sample.txt -----This is an example sentence.This is yet another sentence.------------------------- >>> text2dict("sample.txt", ['a', 'b', 'c', 't']){'a':3, 'b':0, 'c':2, 't':4} (DONT USE İNPUT .VERY İMPORTANT.)arrow_forward8. Name and Email Addresses Write a program that keeps names and email addresses in a dictionary as key-value pairs. The program should display a menu that lets the user look up a person’s email address, add a new name and email address, change an existing email address, and delete an existing name and email address. The program should pickle the dictionary and save it to a file when the user exits the program. Each time the program starts, it should retrieve the dictionary from the file and unpickle it.arrow_forward
- The file, Program11.txt, on the I: drive contains a chronological list of the World Series’ winning teams from 1903 through 2018. The first line in the file is the name of the team that won in 1903, and the last line is the name of the team that won in 2018. (Note that the World Series was not played in 1904 or 1994. There are no entries in the file indicating this.) Write a program that reads this file and creates a dictionary in which the keys are the names of the teams and each key’s associated value is the number of times the team has won the World Series. The program should also create a dictionary in which the keys are the years and each key’s associated value is the name of the team that won that year. The program should prompt the user for a year in the range of 1903 through 2018. It should thendisplay the name of the team that won the World Series that year and the number of times that team has won the World Series.Allow the user to run the program as many times as possible…arrow_forwardThis assignment requires you to create a dictionary by reading the text file. Text file name: LightningP Text file contents: Stamkos3538Maroon2933Point5055Kucherov5565Killorn3340 The dictionary should have player names for the keys. The value for each key must be a two-element list holding the player's goals and assists, respectively. Start with an empty dictionary. Then, use a loop to cycle through the text file and add key-value pairs to the dictionary. Close the text file and process the dictionary to print the stats and determine the top scorer as before. Printing the stats for each player is the most challenging part of this program. The required output should be the same well-formatted table as below: PLAYER COLUMN: 10 characters wide and left-aligned. GOALS COLUMN: 6 characters wide and centered. ASSISTS COLUMN: 8 characters wide and centered. TOTAL COLUMN: 6 characters wide and centered. Example output:arrow_forwardWrite a program that keeps names and email addresses in a dictionary as key-value pairs.The program should display a menu that lets the user look up a person’s email address, add a new name and email address, change an existing email address, and delete an existing name and email address. The program should save the data stored in a dictionary to a file when the user exits the program. Each time the program starts, it should retrieve the data from the file and store it in a dictionary.The program should include the following functions: a. A function to display a menu.b. A function to look up a person’s email address.c. A function to add a new name and email address.d. A function to change an email address.e. A function to delete a name and email address.f. A function to load emails from a file.g. A function to save emails in a file.h. Write main function with a loop that displays the menu allowing the user to select an operation from the menu; the program continue until the user enter…arrow_forward
- 1)Assume the variable dct references a dictionary. Write code that pickles the dictionary and save it to a file named mydate.dat. 2)Write a program that reads in your question #1 Pythonsource code file and counts the occurrence of each keyword in the file.Your program should prompt the user to enter the Python source code filename.arrow_forwardPython Programming Assignment: Create a dictionary that takes a basketball team's information (that includes team's name and points) as parameter, creates a teams_dict and returns it. Also, create a parameter for write_file parameter that opens current results text file in write mode and writes the dictionary information to file as per format and closes the file.arrow_forwardCode should be in Python. Write a program that first reads in the name of an input file and then reads the input file using the file.readlines() method. The input file contains an unsorted list of number of seasons followed by the corresponding TV show. Your program should put the contents of the input file into a dictionary where the number of seasons are the keys, and a list of TV shows are the values (since multiple shows could have the same number of seasons). Sort the dictionary by key (least to greatest) and output the results to a file named output_keys.txt. Separate multiple TV shows associated with the same key with a semicolon (;), ordering by appearance in the input file. Next, sort the dictionary by values (alphabetical order), and output the results to a file named output_titles.txt. Ex: If the input is: file1.txt and the contents of file1.txt are: 20 Gunsmoke 30 The Simpsons 10 Will & Grace 14 Dallas 20 Law & Order 12 Murder, She Wrote the file output_keys.txt…arrow_forward
- Complete the below function that takes a file name and a list as arguments and reads the text within the corresponding file, then creates a dictionary whose keys are the characters of the provided list, and the values are the counts of these characters within the text. If a character in the list is not included in the text, "0" should be written in the dictionary as the value of this character. The function returns the created dictionary as a result. If the file does not exist, then the function returns an empty dictionary. def text2dict(filename, characters): in pythonarrow_forwardUsing python 1.Assume the variable dct references a dictionary (create dct first). Write an if statement that determines whether the key ‘Jim’ exists in the dictionary. If so, delete ‘Jim’ and its associated value. (write as a function) 2. Assume the variable dct references a dictionary. Write code that pickles the dictionary and save it to a file named mydate.dat (write as a function)arrow_forwardProgram is not run; error found in print(row) # Import the python CSV moduleimport csv# Create a python file object in read mode for the `baby_names.csv` file: csvfilecsvfile = open('baby_names.csv', 'r')# Loop over a DictReader on the filefor row in csv.DictReaderreader(csvfile): # Print each row print(row) # Add the rank and name to the dictionary: baby_names baby_names[row['RANK']] = row['NAME']# Print the dictionaryprint(baby_names.keys())arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Programming Logic & Design ComprehensiveComputer ScienceISBN:9781337669405Author:FARRELLPublisher:Cengage
Programming Logic & Design Comprehensive
Computer Science
ISBN:9781337669405
Author:FARRELL
Publisher:Cengage
C - File I/O; Author: Tutorials Point (India) Ltd.;https://www.youtube.com/watch?v=cEfuwpbGi1k;License: Standard YouTube License, CC-BY
file handling functions in c | fprintf, fscanf, fread, fwrite |; Author: Education 4u;https://www.youtube.com/watch?v=aqeXS1bJihA;License: Standard Youtube License