Learn Python The Hard Way - Lesson 37 - Keywords

Front 1

and

Back 1

Logical AND operator. Requires all parts of expression to be true for the expression to be true. ie: if x is false, then x, else y

Hint 1

Boolean Operator

Front 2

or

Back 2

Logic OR operator. If any part of expression is True, then the expression is True. ie: if x is false, then y, else x

Hint 2

Boolean Operator

Front 3

del

Back 3

Removes: Items from lists, slices from lists, entire variables from local or global namespace

Hint 3

Simple Statement

Front 4

assert

Back 4

Inserts debugging assertions that return an error when false.

Hint 4

Simple Statement

Front 5

pass

Back 5

Pass is a null operation, when executed nothing happens.

Useful when statement is required syntactically, but not code needs to be executed.

Hint 5

Simple Statement

Front 6

print

Back 6

Evaluates each expression in turn and writes the resulting object to standard output.

Hint 6

Simple Statement

Front 7

return

Back 7

This statement is the evaluation of an expression that results in a return value which can be utilized by your program

Hint 7

Simple Statement

Front 8

yield

Back 8

This statement is used like return but returns a generator

Hint 8

Simple Statement

Front 9

raise

Back 9

Used for raising an exception (a signal that an error or other unusual condition has occurred)

Hint 9

Simple Statement

Front 10

break

Back 10

Used in for and while loops. Terminates the nearest enclosing loop.

Hint 10

Simple Statement

Front 11

continue

Back 11

Used in for and while loops.

Rejects all remaining statements in current iteration of loop and moves the control back to the top of the loop. Skipping an iteration in the loop.

Hint 11

Simple Statement

Front 12

import

Back 12

1. Finds module an initializes if necessary. 2. Defines a name or names in local namespace

Hint 12

Simple Statement

Front 13

global

Back 13

used to declare that a function or method intends to change the value of a name from the global scope, that is, a name from outside the function

Hint 13

Simple Statement

Front 14

from

Back 14

used when importing a module it declares that it is pulling from a specific module.

Hint 14

Augments Import Statement

Front 15

not

Back 15

declares that a given statement is false. ie: if x is false, then True, else False.

Hint 15

Boolean Operator

Front 16

while

Back 16

creates a loop that continues so long as a specific condition is true.

Hint 16

Compound Statement

Front 17

as

Back 17

used with "with" and "Import" to assign a custom variable name and removes the original name.

Hint 17

clause

Front 18

elif

Back 18

Short for 'else if'. Used to test multiple conditions in a given statement.

Hint 18

Compound Statement

Front 19

with

Back 19

used to wrap the execution of a block with methods defined by a context manager. Intended to allow safe acquisition and release of os resources

Front 20

class

Back 20

a statement that creates a new class definition. The name of the class immediately follows the keyword class followed by a colon

Hint 20

Simple Statment

Front 21

else

Back 21

this clause is executed when the a loop terminates through exhaustion of the list (with for) or when the condition becomes false (with while).

Hint 21

Compound Statement

Front 22

if

Back 22

used to test IF a condition is true or false using boolean values

Hint 22

Compound Statement

Front 23

except

Back 23

Specifies one or more exception handlers.

Hint 23

Error Handling

Front 24

exec

Back 24

compiles and immediately evaluates a statement or set of statement contained in a string

Hint 24

Simple Statement

Front 25

in

Back 25

verifies membership of a value in a string.

Hint 25

Keyword

Front 26

finally

Back 26

as part of a try statement it specifies a 'cleanup' handler

Hint 26

Compound Statement

Front 27

is

Back 27

compares object identity, determines if two variables are the same. vs == which compares two values.

Hint 27

Keyword

Front 28

def

Back 28

is used to define a function, which allows you to create re-usable code.

Hint 28

Keyword

Front 29

for

Back 29

creates a loop with any object that has an iterable method (ie lists, tuples etc) and strings.

Hint 29

Compound Statement

Front 30

lambda

Back 30

Shorthand to create anonymous functions

Hint 30

Expression

Front 31

try

Back 31

used in handling errors, tests a specific condition and if it passes will run the rest of the code, if it fails it raises an exception

Hint 31

Exception Handling