代写两个基础的Python程序，考察格式化输出以及逻辑流程控制。
Program: Data visualization (Python 3)
(1) Prompt the user for a title for data. Output the title.
Ex:
Enter a title for the data: Number of Novels Authored
You entered: Number of Novels Authored
(2) Prompt the user for the headers of two columns of a table. Output the
column headers.
Ex:
Enter the column 1 header: Author name
You entered: Author name
Enter the column 2 header: Number of novels
You entered: Number of novels
(3) Prompt the user for data points. Data points must be in this format:
string, int. Store the information before the comma into a string variable and
the information after the comma into an integer. The user will enter -1 when
they have finished entering data points. Output the data points. Store the
string components of the data points in a list of strings. Store the integer
components of the data points in a list of integers.
Ex:
Enter a data point (-1 to stop input): Jane Austen, 6
Data string: Jane Austen
Data integer: 6
(4) Perform error checking for the data point entries. If any of the following
errors occurs, output the appropriate error message and prompt again for a
valid data point.
- If entry has no comma
- Output: Error: No comma in string.
- If entry has more than one comma
- Output: Error: Too many commas in input.
If entry after the comma is not an integer
Jane Austen | 6
* Output: Error: Comma not followed by an integer.
Ex:
Enter a data point (-1 to stop input): Ernest Hemingway 9
Error: No comma in string.
Enter a data point (-1 to stop input): Ernest, Hemingway, 9
Error: Too many commas in input.
Enter a data point (-1 to stop input): Ernest Hemingway, nine
Error: Comma not followed by an integer.
Enter a valid data point: Ernest Hemingway, 9
Data string: Ernest Hemingway
Data integer: 9
(5) Output the information in a formatted table. The title is right justified
with a minimum field width value of 33. Column 1 has a minimum field width
value of 20. Column 2 has a minimum field width value of 23.
Ex:
Number of Novels Authored
Author name | Number of novels
Charles Dickens | 20
Ernest Hemingway | 9
Jack Kerouac | 22
F. Scott Fitzgerald | 8
Mary Shelley | 7
Charlotte Bronte | 5
Mark Twain | 11
Agatha Christie | 73
Ian Flemming | 14
J.K. Rowling | 14
Stephen King | 54
Oscar Wilde | 1
(6) Output the information as a formatted histogram. Each name is right
justified with a minimum field width value of 20.
Ex:
Jane Austen ******
Charles Dickens ********************
Ernest Hemingway *********
Jack Kerouac **********************
F. Scott Fitzgerald ********
Mary Shelley *******
Charlotte Bronte *****
Mark Twain ***********
Agatha Christie *************************************************************************
Ian Flemming **************
J.K. Rowling **************
Stephen King ******************************************************
Oscar Wilde *
Program: Soccer team roster (Dictionaries) (Python 3)
This program will store roster and rating information for a soccer team.
Coaches rate players during tryouts to ensure a balanced team.
(1) Prompt the user to input five pairs of numbers: A player’s jersey number
(0 - 99) and the player’s rating (1 - 9). Store the jersey numbers and the
ratings in a dictionary. Output the dictionary’s elements with the jersey
numbers in ascending order (i.e., output the roster from smallest to largest
jersey number). Hint: Dictionary keys can be stored in a sorted list.
Ex:
Enter player 1’s jersey number: 84
Enter player 1’s rating: 7
Enter player 2’s jersey number: 23
Enter player 2’s rating: 4
Enter player 3’s jersey number: 4
Enter player 3’s rating: 5
Enter player 4’s jersey number: 30
Enter player 4’s rating: 2
Enter player 5’s jersey number: 66
Enter player 5’s rating: 9
ROSTER
Jersey number: 4, Rating: 5
Jersey number: 23, Rating: 4
Jersey number 30, Rating: 2
…
(2) Implement a menu of options for a user to modify the roster. Each option
is represented by a single character. The program initially outputs the menu,
and outputs the menu after a user chooses an option. The program ends when the
user chooses the option to Quit. For this step, the other options do nothing.
Ex:
MENU
a - Add player
d - Remove player
u - Update player rating
r - Output players above a rating
o - Output roster
q - Quit
Choose an option:
(3) Implement the “Output roster” menu option.
Ex:
ROSTER
Jersey number: 4, Rating: 5
Jersey number: 23, Rating: 4
Jersey number 30, Rating: 2
…
(4) Implement the “Add player” menu option. Prompt the user for a new player’s
jersey number and rating. Append the values to the two vectors.
Ex:
Enter a new player’s jersey number: 49
Enter the player’s rating: 8
(5) Implement the “Delete player” menu option. Prompt the user for a player’s
jersey number. Remove the player from the roster (delete the jersey number and
rating).
Ex:
Enter a jersey number: 4
(6) Implement the “Update player rating” menu option. Prompt the user for a
player’s jersey number. Prompt again for a new rating for the player, and then
change that player’s rating.
Ex:
Enter a jersey number: 23
Enter a new rating for player: 6
(7) Implement the “Output players above a rating” menu option. Prompt the user
for a rating. Print the jersey number and rating for all players with ratings
above the entered value.
Ex:
Enter a rating: 5
ABOVE 5
Jersey number: 66, Rating: 9
Jersey number: 84, Rating: 7
…
