Python

Question 1

download file from web from command line

Answer 1

import urllib
urllib.urlretrieve (“http://www.example.com/songs/mp3.mp3”, “mp3.mp3”)
import urllib
urllib.urlretrieve (“http://www.example.com/songs/mp3.mp3”, “mp3.mp3”)

Question 2

move and rename a file in os

Answer 2

import os

os.rename(‘somefile’, ‘somewhere/else’)

Question 3

return a new sorted list in ascending order

Answer 3

sorted([5, 2, 3, 1, 4])

Question 4

Use list.sort() method of a list to modify list in place.

Answer 4

> > > a = [5, 2, 3, 1, 4]
a.sort()
a
[1, 2, 3, 4, 5]

Question 5

Add item to the end of a list

Answer 5

list.append(x)

Question 6

Return the number of times x appears in a list.

Answer 6

list.count(x)

Question 7

Argument specifier for any object with a string representation.

Answer 7

%s

Question 8

Argument specifier for integers

Answer 8

%d

Question 9

Argument specifier for floating point numbers

Answer 9

%f

Question 10

Floating point numbers with a fixed amount of digits to the right of the .

Answer 10

%.f

Question 11

Argument specifier for Integers in hex representation (lowercase/uppercase)

Answer 11

%x/%X

Question 12

print the number of a’s in a string called string

Answer 12

print string.count(‘a’)

Question 13

print a slice of the string string

Answer 13

print string[3:7]

Question 14

print the length of a string called string

Answer 14

print len(string)

Question 15

print the location of the first occurrence of the letter b in a string called string

Answer 15

pring string.index(‘b’)

Question 16

make letters in var astring uppercase

Answer 16

astring.upper( )

Question 17

make letters in a string called astring lowercase

Answer 17

astring.lower( )

Question 18

argument in a function

Answer 18

The piece of code you put between the function’s parenthesis when you call it

Question 19

parameter in function

Answer 19

Name you put between the function’s parenthesis when you define it.

Question 20

Function import aka Pulling in just a single function from a module

Answer 20

from module import function (where module and function are the names of the module and the function)

Question 21

Import everything in a module without having to call that module every time you want to use it in the future.

Answer 21

from module import *

Question 22

explicit string conversion

Answer 22

str( )

Question 23

Syntax for a string formatter (to print strings without explicitly typing the variable

Answer 23

print “%s” % (variable)

Question 24

Order of operations in boolean

Answer 24

Not, and, or