question

and (keyword)

answer

Logical and. >>> True and False == False

question

as (keyword)

answer

Part of the with-as statement. >>> with X as Y: pass

question

assert (keyword)

answer

Assert (ensure) that something is true. >>> assert False, "Error!"

question

break (keyword)

answer

Stop this loop right now. >>> while True: break

question

class (keyword)

answer

Define a class. >>> class Person(object)

question

continue (keyword)

answer

Don't process more of the loop, do it again. >>> while True: continue

question

def (keyword)

answer

Define a function. >>> def X(): pass

question

del (keyword)

answer

Delete from dictionary. >>> delX[Y]

question

elif (keyword)

answer

Else if condition. >>> if: X; elif: Y; else: J

question

else (keyword)

answer

Else condition >>> if: X; elif: Y; else: J

question

except (keyword)

answer

If an exception happens, do this. >>> except ValueError, e: print e

question

exec (keyword)

answer

Run a string as Python. >>> exec 'print "Hello"'

question

finally (keyword)

answer

Exceptions or not, finally do this no matter what. >>> finally: pass

question

for (keyword)

answer

Loop over a collection of things. >>> for X in Y: pass

question

from (keyword)

answer

Importing specific parts of a module. >>> import X from Y

question

global (keyword)

answer

Declare that you want a global variable. >>> global X

question

if (keyword)

answer

If condition. >>> if: X; elif: Y; else: J

question

import (keyword)

answer

Import a module into this one to use. >>> import os

question

in (keyword)

answer

Part of 'for-loops'. Also a test of X in Y. >>> for X in Y: pass >>> 1 in [1] == True

question

lambda (keyword)

answer

Create a short anonymous function. >>> s = lambda y: y ** y; s (3)

question

not (keyword)

answer

Logical not. >>> not True == False

question

or (keyword)

answer

Logical or. >>> True or False == True

question

pass (keyword)

answer

This block is empty. >>> def empty(): pass

question

print (keyword)

answer

Print this string. >>> print 'this string'

question

raise (keyword)

answer

Raise an exception when things go wrong. >>> raise ValueError("No")

question

return (keyword)

answer

Exit the function with a return value. >>> def X(): return Y

question

try (keyword)

answer

Try this block, and if exception, go to 'except'. >>> try: pass

question

while (keyword)

answer

While loop. >>> while X: pass

question

with (keyword)

answer

With an expression as a variable do. >>> with X as Y: pass

question

yield (keyword)

answer

Pause here and return to caller. >>> def X(): yield Y; X().next()

question

True (data type)

answer

True boolean value. >>> True or False == True

question

False (data type)

answer

False boolean value. >>> False and True == False

question

None (data type)

answer

Represents "nothing" or "no value". >>> x = None

question

strings (data type)

answer

Store textual information. >>> x = "hello"

question

numbers (data type)

answer

Stores integers. >>> i = 100

question

floats (data type)

answer

Stores decimals. >>> i = 10.389

question

lists (data type)

answer

Stores a list of things. >>> j = [1,2,3,4]

question

dicts (data type)

answer

Stores a key=value mapping of things. >>> e = {'x': 1, 'y': 2}

question

(string escape sequence)

answer

Backslash

question

' (string escape sequence)

answer

Single-quote

question

" (string escape sequence)

answer

Double-quote

question

a (string escape sequence)

answer

Bell

question

b (string escape sequence)

answer

Backspace

question

f (string escape sequence)

answer

Formfeed

question

n (string escape sequence)

answer

Newline

question

r (string escape sequence)

answer

Carriage

question

t (string escape sequence)

answer

Tab

question

v (string escape sequence)

answer

Vertical tab

question

%d (string format)

answer

Decimal integers (not floating point). >>> "%d" % 45 == '45'

question

%i (string format)

answer

Same as %d. >>> "%i" % 45 == '45'

question

%o (string format)

answer

Octal number. >>> "%o" % 1000 == '1750'

question

%u (string format)

answer

Unsigned decimal. >>> "%u" % -1000 == '-1000'

question

%x (string format)

answer

Hexadecimal lowercase. >>> "%x" % 1000 == '3e8'

question

%X (string format)

answer

Hexadecimal uppercase. >>> "%X" % 1000 == '3E8'

question

%e (string format)

answer

Exponential notation, lowercase 'e'. >>> "%e" % 1000 == '1.000000e+03'

question

%E (string format)

answer

Exponential notation, uppercase 'E'. >>> "%E" % 1000 == '1.000000E+03'

question

%f (string format)

answer

Floating point real number. >>> "%f" % 10.34 == '10.340000'

question

%F (string format)

answer

Same as %f. (Floating point real number.) >>> "%F" % 10.34 == '10.340000'

question

%g (string format)

answer

Either %f or %e, whichever is shorter. >>> "%g" % 10.34 == '10.34'

question

%G (string format)

answer

Same as %g but uppercase. (Either %f or %e, whichever is shorter.) >>> "%G" % 10.34 == '10.34'

question

%c (string format)

answer

Character format. >>> "%c" % 34 == '"'

question

%r (string format)

answer

Repr format (debugging format). >>> "%r" % int == ""

question

%s (string format)

answer

String format. >>> "%s there" % 'hi' == 'hi there'

question

%% (string format)

answer

A percent sign. "%g%%" % 10.34 == '10.34%'

question

+ (operator)

answer

Addition >>> 2 + 4 == 6

question

- (operator)

answer

Subtraction >>> 2 - 4 == -2

question

* (operator)

answer

Multiplication >>> 2 * 4 == 8

question

** (operator)

answer

Power of >>> 2 ** 4 == 16

question

/ (operator)

answer

Division >>> 2 / 4.0 == 0.5

question

// (operator)

answer

Floor division >>> 2 // 4.0 == 0.0

question

% (operator)

answer

String interpolate or modulus >>> 2 % 4 == 2

question

< (operator)

answer

Less than >>> 4 < 4 == False

question

> (operator)

answer

Greater than >>> 4 > 4 == False

question

<= (operator)

answer

Less than equal >>> 4 <= 4 == True

question

>= (operator)

answer

Greater than equal >>> 4>= 4 == True

question

== (operator)

answer

Equal >>> 4 == 5 == False

question

!= (operator)

answer

Not equal >>> 4 != 5 = True

question

(operator)

answer

Not equal >>> 4 5 == True

question

( ) (operator)

answer

Parenthesis >>> len('hi') == 2

question

[ ] (operator)

answer

List brackets >>> [1,3,4]

question

{ } (operator)

answer

Dict curly braces >>> {'x': 5, 'y': 10}

question

@ (operator)

answer

At (decorators) >>> @classmethod

question

, (operator)

answer

Comma >>> range(1, 10)

question

: (operator)

answer

Colon >>> def X():

question

. (operator)

answer

Dot >>> self.x = 10

question

= (operator)

answer

Assign equal >>> x = 10

question

; (operator)

answer

semi-colon >>> print "hi"; print "there"

question

+= (operator)

answer

Add and assign >>> x = 1; x += 2

question

-= (operator)

answer

Subtract and assign >>> x = 1; x -= 2

question

*= (operator)

answer

Multiply and assign >>> x = 1; x *= 2

question

/= (operator)

answer

Divide and assign >>> x = 1; x /= 2

question

//= (operator)

answer

Floor divide and assign >>> x = 1; x//= 2

question

%= (operator)

answer

Modulus assign >>> x = 1; x %= 2

question

**= (operator)

answer

Power assign >>> x = 1; x **= 2

Learn Python The Hard Way Exercise 37 Symbol Review – Flashcards

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