Symbol Review

Question 1

and

Answer 1

Logical and

e.g., True and False == False

Question 2

as

Answer 2

Part of the with-as statement

Question 3

assert

Answer 3

Assert (ensure) that something is true; if assertion is false, the program gives an assertion error

e.g., assert False, “Error!”

Question 4

break

Answer 4

Stop this loop right now; move to next line of code

e.g., while True: break

Question 5

class

Answer 5

Define a class

e.g., class Person(object)

Question 6

continue

Answer 6

Don’t process more of the loop, do it again; it does not process remaining code, but it iterates again

e.g., while True: continue

Question 7

def

Answer 7

Define a function

e.g., def X(): pass

Question 8

del

Answer 8

Delete from dictionary

Del X[Y]

Question 9

elif

Answer 9

Else if Condition

Question 10

else

Answer 10

Else Condition

Question 11

except

Answer 11

If an exception happens, do this except ValueError, print(e)

Question 12

exec

Answer 12

Run a string as Python

It can take three parameters:

object: As already said this can be a string or object code
globals: This can be a dictionary and the parameter is optional
locals: This can be a mapping object and is also optional

Question 13

finally

Answer 13

Exceptions or not, finally do this no matter what

e.g., finally: pass

Question 14

for

Answer 14

Loop over a collection of things

e.g., for X in Y: pass

Question 15

from

Answer 15

Importing specific parts of a module

e.g., from X import Y

Question 16

global

Answer 16

Declare that you want a global variable; allows to modify the variable outside of the current scope; creates a global variable and makes changes to the variable in a local context
A variable defined outside of a function is global by default

e.g., global X

Question 17

if

Answer 17

If Condition

Question 18

import

Answer 18

import a module into this one to use

e.g. import os

Question 19

in

Answer 19

Part of for-loops. Also a test of X in Y

e.g., for X in Y: pass + 1 in [1] == True

Question 20

is

Answer 20

Like == to test equality

e.g. 1 is 1 == True

Question 21

lambda

Answer 21

Create a short anonymous function

e.g., s = lambda y:y**y; s(3)

Question 22

not

Answer 22

Logical not

Question 23

or

Answer 23

Logical or

Question 24

pass

Answer 24

This block is empty
e.g.,
def empty():
pass # a function that does nothing (yet)

Question 25

print

Answer 25

Print this string

Question 26

raise

Answer 26

Raise an exception when things go wrong If no expressions are present, "raise" re-raises the last expression that was raised in the current scope e.g., Raise ValueError("No")

Question 27

return

Answer 27

Exit the function with a return value; it hands back a value to the caller ``` e.g., def X(): return ```

Question 28

try

Answer 28

Try this block and if exception, go to except e.g., try: pass

Question 29

while

Answer 29

While Loop

Question 30

with

Answer 30

With an expression as a variable do With X as Y: pass

Question 31

yield

Answer 31

Returns the caller a generator e.g., def X(): return Y X().next()