1. Type the expressions below in python interactively, and try to explain what's happening in each case: a. 2** 16 2/5, 2/5.0 b. "spam" + "eggs" S = "ham" "eggs " +S S*5 S[:0] "green %s and %s" % ("eggs", S) c. ('x',) [0] (x, У) [1] d. L= [1,2,3] + [4,5,6] L, L[:], L[:0], L[-2], L[-2:] ([1,2,3] + [4,5,6]) [2:4] [L[2], L[3]] L.reverse(); L L.sort(); L L.index(4)
1. Type the expressions below in python interactively, and try to explain what's happening in each case: a. 2** 16 2/5, 2/5.0 b. "spam" + "eggs" S = "ham" "eggs " +S S*5 S[:0] "green %s and %s" % ("eggs", S) c. ('x',) [0] (x, У) [1] d. L= [1,2,3] + [4,5,6] L, L[:], L[:0], L[-2], L[-2:] ([1,2,3] + [4,5,6]) [2:4] [L[2], L[3]] L.reverse(); L L.sort(); L L.index(4)
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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![1. Type the expressions below in python interactively, and try to explain what's
happening in each case:
a. 2** 16
2/5, 2/5.0
b. "spam" + "eggs"
S = "ham"
"eggs " +S
S*5
S[:0]
"green %s and %s" % ("eggs", S)
с. (х,) [0]
('x', 'y') [1]
d. L= [1,2,3] + [4,5,6]
L, L[:], L[:0], L[-2], L[-2:]
([1,2,3] + [4,5,6]) [2:4]
[L[2], L[3]]
L.reverse(); L
L.sort(); L
L.index(4)
2. At the interactive prompt, define a list named L that contains four strings or
numbers (e.g., L=[0,1,2,3]).
a. What happens when you try to index out of bounds (e.g., L[4])?
b. What about slicing out of bounds (e.g., L[-1000:100])?
c. Finally, how does Python handle it if you try to extract a sequence in
reverse-with the lower bound greater than the higher bound (e.g.,
L[3:1])? Hint: try assigning to this slice(L[3:1]=['?']) and see where the
value is put.
3.
a. Write a for loop that prints the ASCII code of each character in a string
named S. Usethe built-in function ord(character) to convert each
character to an ASCII integer.
b. Next, change your loop to compute the sum of the ASCII codes of all
characters in a string
4. Use a for loop and the list append method to generate the powers of 2 to
produce the following result [1, 2, 4, 8, 16, 32, 64, 128]
Write a for loon that prints a dictionary's items in sorted (ascendinal order](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbe515286-0080-4848-9879-43fa30c1a171%2Fdf49681e-44d0-4d0d-b9c6-f778d054edc3%2F4yvhq9d_processed.png&w=3840&q=75)
Transcribed Image Text:1. Type the expressions below in python interactively, and try to explain what's
happening in each case:
a. 2** 16
2/5, 2/5.0
b. "spam" + "eggs"
S = "ham"
"eggs " +S
S*5
S[:0]
"green %s and %s" % ("eggs", S)
с. (х,) [0]
('x', 'y') [1]
d. L= [1,2,3] + [4,5,6]
L, L[:], L[:0], L[-2], L[-2:]
([1,2,3] + [4,5,6]) [2:4]
[L[2], L[3]]
L.reverse(); L
L.sort(); L
L.index(4)
2. At the interactive prompt, define a list named L that contains four strings or
numbers (e.g., L=[0,1,2,3]).
a. What happens when you try to index out of bounds (e.g., L[4])?
b. What about slicing out of bounds (e.g., L[-1000:100])?
c. Finally, how does Python handle it if you try to extract a sequence in
reverse-with the lower bound greater than the higher bound (e.g.,
L[3:1])? Hint: try assigning to this slice(L[3:1]=['?']) and see where the
value is put.
3.
a. Write a for loop that prints the ASCII code of each character in a string
named S. Usethe built-in function ord(character) to convert each
character to an ASCII integer.
b. Next, change your loop to compute the sum of the ASCII codes of all
characters in a string
4. Use a for loop and the list append method to generate the powers of 2 to
produce the following result [1, 2, 4, 8, 16, 32, 64, 128]
Write a for loon that prints a dictionary's items in sorted (ascendinal order
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