Question

With the code given write python code that prints the probability of getting a flush when you run 10**5 trails.

this is what i have so far but it says that isFlush is not defined. why?

# Print out probability that a 5-card hand has all the same suit

#seed(0)
num_trials = 10**5

trials = [dealHand for k in range(num_trials)] # 5 card hand
prob = sum([l for h in trials if isFlush(h)])/num_trials # sum the list of numbers that are a flush

def isFlush(h):
dist = counter([suit(c) for c in h])
if 5 in dist.values():
print('the probablity of a flush is ' + str(prob))

HELPER CODE:

# We will represent cards as a string, e.g., 'AC' will be Ace of Clubs

# Denominations: 2, ..., 10, 'J' = Jack, 'Q' = Queen, 'K' = King, 'A' = Ace
Denominations = ['2','3','4','5','6','7','8','9','10','J','Q','K','A']

# Suits 'S' = Spades, 'H' = Hearts, 'D' = Diamonds, 'C' = Clubs
Suits = ['C', 'H', 'S', 'D']

# Note that colors are determined by the suits (hearts and diamonds are red, others black,
# so, AC is Black
  
# List comprehensions are a great way to avoid explicit for loops when creating lists

Deck = [(d+s) for d in Denominations for s in Suits] # Note the double for loop

print( Deck )

# Now we can "deal" cards by choosing randomly from the deck

seed(0) # seed makes sure that all your computations start with the same random sequence;
# this not really important, and only necessary for debugging and grading.
def dealCard():
return choice(Deck) # choice randomly chooses an element of a list

print( dealCard() )

# When dealing a hand in cards, the selection of cards is without replacement, that is, cards are removed from
# the deck one by one and not put back. This can be simulated in the choice function by setting the replace
# parameter to False.

seed(0)

def dealHand(withReplacement = False,size = 5):
return choice(Deck,size,withReplacement) # chooses a list of size elements

print( dealHand() )

# extract the denomination and the suit from a card

def denom(c):
return c[0:-1]

def suit(c):
return c[-1]

# The function rank(c) will simply return the position of the card c PLUS 2 in the list 2, 3, ...., K, A. This will be used in an essential
# way in our code below. Although in the diagram given lecture, Ace is below 2, the Ace is actually considered to be ordered
# above the King, for example in determining a straight, under "Ace high rules."

# rank(2) = 2, ...., rank(10) = 10, rank(Jack) = 11, rank(Queen) = 12, rank(King) = 13, rank(Ace) = 14

def rank(c):
return Denominations.index(denom(c))+2

# Now we want to identify various kinds of cards

def isHeart(c):
return ( suit(c) == 'H')

def isDiamond(c):
return ( suit(c) == 'D')

def isClub(c):
return ( suit(c) == 'C')

def isSpade(c):
return ( suit(c) == 'S')

def isRed(c):
return ( isHeart(c) or isDiamond(c) )

def isBlack(c):
return (not isRed(c))

def isFaceCard(c):
return rank(c) >= 11 and rank(c) <= 13

Answer 1

-In Python you cannot use any function untill you define it otherwise it will give error as function is not define;

example::

In above Example call is used before it is defined so it gave error

-In your case,You are using isFlush before the isFlush define so you have to define the isFlush function before the you have used

Solution::

So you should define isFlush function before

prob = sum([l for h in trials if isFlush(h)])/num_trials # sum the list of numbers that are a flush

statement not after it