In python make a function with the parameter of a dict[str, str] the function will simply invert the dictionary do not use .get, .item, .values, or import builtins If you encounter more than one of the same key when trying to invert the key and value, raise a keyerror for example ['john': 'white', 'garcia': 'white'], should trigger the raise KeyError call

In python make a function with the parameter of a dict[str, str] the function will simply invert the dictionary do not use .get, .item, .values, or import builtins If you encounter more than one of the same key when trying to invert the key and value, raise a keyerror for example ['john': 'white', 'garcia': 'white'], should trigger the raise KeyError call

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Write a python program... Write a function called merge2(d1,d2) that takes two dictionaries as input parameters. This function will create a new dictionary that contains everything from the two input dictionaries and return it. The same key might appear in both input dictionaries. In the output dictionary, the value for each key will be a list that has all values corresponding to this key in the two input dictionaries. Sample run,>>> d1 = {'a': 100, 'b': 200, 'c':300}>>> d2 = {'a': 300, 'b': 200, 'd':400} >>> d3 = merge2(d1,d2)>>> display(d3)a, [100,300]b, [200,200]c, [300]d, [400]
Your task here is to use Python's set class to count the number of unique words in a file, and use Python's dictionary class to produce a Top 10 list of the ten most frequently used words having a length larger than 4 in each file.
in python write a function where it makes a dictionary from given text file. If no value is present then it is an empty set. should work for any textfile. data with no spaces are keys, data after the tab space is the value def new_dict (textfile): return {} textfile input node1 node2 expected output {'node1': {'node2'}, 'node2': set()} should work with this text file as well: A B C B A C C A B D E E D F G G F H H G I I H G J J I K L L K M M L
Write a python program... Write a function called merge1(d1,d2) that takes two dictionaries as input parameters. This function will create a new dictionary that contains everything from the two input dictionaries and return it. For this problem, you can assume that the input dictionaries do not have any keys in common. Create a few dictionaries, print them to screen using the function created above. After this, merge them using the function you wrote and print the result to the terminal. Sample run,>>> d1 = {'A': 100, ‘C':300}>>> d2 = {'B': 200, 'D':400}>>> d3 = merge1(d1,d2)>>> display(d3)A, 100B, 200D, 400C, 300
Creation of a python function named b_length that bins a list of strings into a dictionary where the key is an int length of a given string and the associated values are a set of strings of the key’s length found in the original list. How it should work correctly in a test: assert b_length(["your", "quick", "code"]) == {3: {"your", "code"}, 5: {"quick"}} assert b_length(["the", "the", "code"]) == {3: {"the", "code"}}
Write a python program... Write a function called safeAdd(d, k, v, unsafe=False) that takes either three or four input parameters when called. Here, d is a dictionary, k is a key and v is a value. The function will add the key:value pair k:v to the dictionary d if the key k is NOT in the dictionary.If the key is in the dictionary, the function will display the current value for that key, the new value you passed into the function and ask the user if they wish to proceed and overwrite the existing value.If the optional fourth parameter is True, then just add the key:value pair without checking if the key is already present.Sample run (user input is highlighted) >>> d = {'A':1}>>> safeAdd(d, 'B', 3}>>> display(d)A, 1B, 3>>> safeAdd(d, 'B', 2)The key B is already in the dictionary.Current value is 3. Do you want to replace this value with 2? [yes/no] yes>>> display(d)A, 1B, 2>>> safeAdd(d, 'A', 12)The key A is already in the…
note: use python and not import Write a function named dictMax which takes two arguments: a dictionary and a list. Your function must look for the keys provided in the list argument, within the dictionary argument and return the maximum of the corresponding values. For example: dictMax({1:3, 3:2, 4:5, 2:6, 7:-1, 6:-3}, [3,2,6]) will return 6, because key 3 in the dictionary corresponds to value 2, key 2 to value 6 and key 6 to value -3, and among 2, 6 and -3, the maximum is 6. If a key does not exist in the dictionary, you should omit it. If none of the keys exist in the dictionary, you should return None.
Modify the following program to read dictionary items from a file and write the inverted dictionary to a file: characters = {'Bugs':['Rabbit', 1940, 'boy'], 'Garfield': ['Cat', 1978, 'boy'], 'Tweety': ['Bird', 1942, 'girl'], 'Sandy': ['Squirrel', 1999, 'female']} print("Printing the original dictionary") print(characters) print("") def invert_dict(characters): inverse = dict() for key in characters: val = characters[key] for list_item in val: if list_item not in inverse: inverse[list_item] = [key] else: inverse[list_item].append(key) return inverse my_invert = invert_dict(characters) print("Printing the inverted dictionary") print(my_invert) Include the following: 1) The input file for your original dictionary (with at least six items).2) The Python program to read from a file, invert the dictionary, and write to a different file.3) The output file for your inverted dictionary.…
Write a function in python, cannot use isalpha or .get named count_letters that takes as a parameter a string and returns a dictionary that tabulates how many of each letter is in that string. The string can contain characters other than letters, but only the letters should be counted. The string could even be the empty string (just ""). Lower-case and upper-case versions of a letter should be part of the same count. The keys of the dictionary should be upper-case letters. If a letter does not appear in the string, then it would not get added to the dictionary. For example, if the string is "AaBb" then the dictionary that is returned should contain these key-value pairs: {'A': 2, 'B': 2}
Can you ask with the Python software language Write a function that takes two arguments: stock and ingr (short for ingredients) and returns the missing ingredients in stock. stock is a dictionary containing (key,value) pairs in the form of ("potato", 5). The key is the name of an ingredient, and the vlaue is its existing amount. ingr is a list of tuples, where each tuple represents the required amount of an ingredient. For example, ("cheese", 3) means we need 3 units of cheese for this recipe. Your function checks whether we have enough of each item in the stock. If an item is missing or not enough then your function returns the missing amount within a list of all such items. If all items are in stock, then you return an empty list. For example: stock = {"salt":100, "sugar":100, "flour":50, "apple":3, "cream":10} ingr = [("sugar",50), ("flour", 120), ("apple",5)] checkStock(stock, ingr) should return [("flour",70), ("apple",2)] which means we need 70 more units of flour and 2 more…
Can you answer with Python programming language ? Write a function that takes two arguments: stock and ingr (short for ingredients) and returns the missing ingredients in stock. stock is a dictionary containing (key,value) pairs in the form of ("potato", 5).The key is the name of an ingredient, and the value is its existingamount. ingr is a list of tuples, where each tuple represents the requiredamount of an ingredient. For example, ("cheese", 3) means we need 3 units of cheese for this recipe. Your function checks whether we have enough of each itemin the stock. If an item is missing or not enough then your function returns the missing amount within a list of all such items. If all items are in stock, then you return an empty list. For example: stock = {"salt":100, "sugar":100, "flour":50, "apple":3, "cream":10}ingr = [("sugar",50), ("flour", 120), ("apple",5),("orange",25),("salt",40)] checkStock(stock, ingr) should return [("flour",70), ("apple",2),("orange",25)] which means we need…
Write a program that creates a Dictionary containing the U.S. states as keys and their capitals as values. (Use the internet to get a list of the states and their capitals.) The program should then random quiz the user by displaying the name of a state and asking the user to enter that state’s capital. The program should keep a count of the number of correct and incorrect responses. (As an alternative to the U.S. states, the program can use the names of countries and their capitals.) for C programming