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| 1. Define a function in interactive mode that calculates the volume of a sphere using the formula | 1. Write a function that calculates the volume of a sphere using the formula ''4/3*pi*''r''^3^''. What is the volume of a sphere with radius of 5? Hint 1: The module {{{math}}} has a field called {{{pi}}}. Hint 2: The answer is ''not'' 392.70. 2. Write a function that takes a list as argument and returns a list of unique elements from the original list. 3. Create a dictionary {{{D}}} with keys {{{a}}}, {{{b}}}, and {{{c}}}. What happens if you try to index an nonexistant key {{{d}}} ({{{D[d]}}})? Whath appens if you try to assign a nonexting key d (e.g. {{{D[d] = 'spam'}}})? 4. Write a {{{for}}} loop that prints a dictionary's items in sorted (ascending) order. Hint: Use dictionary {{{keys}}} and the list {{{sort}}} method. 5. Write a function, {{{copyDict(dict)}}} that copies a dictionary. It should return a new dictionary with all items in its argument. |
1. Write a function that calculates the volume of a sphere using the formula 4/3*pi*r3. What is the volume of a sphere with radius of 5?
Hint 1: The module math has a field called pi.
Hint 2: The answer is not 392.70.
2. Write a function that takes a list as argument and returns a list of unique elements from the original list.
3. Create a dictionary D with keys a, b, and c. What happens if you try to index an nonexistant key d (D[d])? Whath appens if you try to assign a nonexting key d (e.g. D[d] = 'spam')?
4. Write a for loop that prints a dictionary's items in sorted (ascending) order.
Hint: Use dictionary keys and the list sort method.
5. Write a function, copyDict(dict) that copies a dictionary. It should return a new dictionary with all items in its argument.