Creates and returns a mutable dictionary, initially giving it enough allocated memory to hold a given number of entries.
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Creates and returns a mutable dictionary, initially giving it enough allocated memory to hold a given number of
entries.
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- void dict_clear (dict_t* dict); This function clears the dictionary dict, destroying each pair key/value, but does not destroy dict itself (remember that dict was allocated using dict_create, so it will need to be freed at some point, but this is not this function’s job.) This is now the function that frees (destroys) a dictionary: void dict_destroy (dict_t* dict); This operates just as dict_clear, but in addition should free the memory that was allocated during dict_create. After a call to this function, if any other library function receives the pointer dict, the behavior is undefined (most likely, it will crash). This simple function returns the current size of the dictionary: size_t dict_size (const dict_t* dict);Python Write a function print_dict to print all the key-values in a dictionary, for example: >>> d2 {'a': 'one', 'b': 'two', 'c': 'Three'} >>> print_dict(d2) a:one b:two c:ThreeYou can create an empty dictionary with dictionary() [ ] ( ) { } This data structure stores a collection of objects in an unordered manner where each object must be unique dictionary set tuple list
- A date-to-event dictionary is a dictionary in which the keys are dates (as strings in the format 'YYYY-MM-DD'), and the values are lists of events that take place on that day. Complete the following function according to its docstring. Your code must not mutate the parameter! def group_by_year (events: Dict[str, List[str]]) -> Dict [str, Dict [str, List[str]]]: """Return a dictionary in which in the keys are the years that appear in the dates in events, and the values are the date-to-event dictionaries for all dates in that year. >>> date_to_event = {'2018-01-17': ['meeting', 'lunch'], '2018-03-15': ['lecture'], '2017-05-04': ['gym', 'dinner']} >>> group_by_year (date_to_event) {'2018': {'2018-01-17': ['meeting', 'lunch'], '2018-03-15': ['lecture']}, '2017': {'2017-05-04': ['gym', 'dinner']} } || || ||Task 5: Unscramble You will write a program that takes in 2 files: a dictionary file and a file listing jumbled words. Your binary will be called unscramble and will be run using unscramble The file contains a bunch of scrambled words, one word per line. Your job is to print out these jumbles words, 1 word to a line. After each jumbled word, print a list of real dictionary words that could be formed by unscrambling the jumbled word. The dictionary words that you have to choose from are in the file. As an example, the starter package contains two sample input files and the result should look as follows. The order that you display the dictionary words on each line can be different; however, the order that you print out the jumbled words should be identical to the order in your input. The sample out below is skipping a few lines to save handout space (your output must not omit these lines). nwae: wean anew wane eslyep: sleepy rpeoims: semipro imposer promise ettniner: renitent.…A sorted dictionary must use search keys that belong to a class that implements the interface οι ο Sortable Equals Comparable Searchable
- File Encryption and DecryptionWrite a program that uses a dictionary to assign “codes” to each letter of the alphabet. Forexample:codes = { ‘A’ : ‘%’, ‘a’ : ‘9’, ‘B’ : ‘@’, ‘b’ : ‘#’, etc . . .}Using this example, the letter A would be assigned the symbol %, the letter a would beassigned the number 9, the letter B would be assigned the symbol @, and so forth.The program should open a specified text file, read its contents, then use the dictionaryto write an encrypted version of the file’s contents to a second file. Each character in thesecond file should contain the code for the corresponding character in the first file.Write a second program that opens an encrypted file and displays its decrypted contentson the screen. in phytonIn an array-based implementation of a dictionary, you can store key-value pairs in parallel arrays encapsulated in an object both a and b none of the above#The Iris Dataset import sklearn.datasetsimport matplotlib.pyplot as plt import numpy as np import scipy iris = sklearn.datasets.load_iris() Write a function that takes in an index i and prints out a verbose desciption of the species and measurements for data point i. For example:Data point 5 is of the species setosaIts sepal length (cm) is 5.4Its sepal width (cm) is 3.9Its petal length (cm) is 1.7Its petal width (cm) is 0.4
- True/False 9. A Python dictionary is a kind of sequence.char buffer [BUFSIZE]; int fd = open("fooey", O_WRONLY|O_CREAT|O_TRUNC,0777); strcpy(buffer, "First data"); write(fd, buffer, strlen(buffer)); 1seek (fd, 90, SEEK_SET); strcpy (buffer, "Second data"); write(fd, buffer, strlen(buffer)); 1seek (fd, 100, SEEK_END); strpcy (buffer, "Third data"); write(fd, buffer, strlen(buffer)); close(fd); a. What is the size of the file at the end of this section of code? b. Describe the contents of the file say exactly what byte offsets contain actual data, and what offsets constitute "holes". c. Why might holey files be useful? d. Suppose, after the above sequence of writes, the same program opens the file for reading and then does:def histogram(words): """ Given a list of words, create a histogram dictionary where the key is the length of a word and the value is the count of how many words in the list are of that length. Return the histogram dictionary mapping length to word counts """