打印語句在if / elif / else塊中不起作用

Question

我有一個我要重做的項目。 這是一門有關交互式Python編程的課程。 提交的截止日期已經過去，所以我在這里沒有違反榮譽代碼，只是想了解為什么我現在為同一項目使用的代碼無法正常工作。

游戲是猜數字。 if塊中的所有print語句都根本不會打印出來，我當然認為應該打印出來。 在評估階段，我已經完成了其他幾個學生項目，但是仍然看不到我的代碼為什么不正確。

游戲在瀏覽器中執行此游戲在瀏覽器中點擊這里

這是我正在使用的代碼：

# Sanderson, Steven
# template for "Guess the number" mini-project
# input will come from buttons and an input field
# all output for the game will be printed in the console

import simplegui
import random
import math

# initialize global variables used in your code
secret = 0         # The secret number
guesses = 0        # The amount of guesses you will have left
guess_count = 0    # How many guesses you made
range_limit = 100  # The number range of the game


def init():
    # Here I reference the global variables because they
    # are now inside of a function being referenced locally
    global range_limit
    global secret

    # This following line limits the amount of guesses
    # the player can have based upon the given 
    # range_limit of the game
    guesses = int(math.ceil(math.log(range_limit,2)))

    # This following line of code generates a secret
    # number for the specified range of the game,
    # it has been initialized to a range of 100 to 
    # start the game
    secret = random.randrange(0, range_limit)

    # Converts range_limit to a string to print to console
    print "Play Guess The Number. The range is 0 to", + range_limit
    print "You have " +str(guesses) + " guesses for this game"
    print ""

# define event handlers for control panel

def range100():
    # button that changes range to range [0,100) and restarts
    global range_limit
    global secret
    global guesses
    range_limit = 100
    init()

def range1000():
    # button that changes range to range [0,1000) and restarts
    global range_limit, secret, guesses
    range_limit = 1000
    init()

def input_guess(guess):
    # main game logic goes here
    int_guess = int(guess)
    global guess_count
    global guesses
    global secret
    guesses += -1
    guess_count = guess_count + 1

    if int_guess == secret:
        print "You Win and did it in " +str(guess_count) + " guesses"
        print ""
        init()
    elif int_guess > secret:
        print "You guessed " +str(guess) + " guess lower"
        print "You have " +str(guesses) + " guesses left"
        print ""
    elif int_guess < secret:
        print "You guessed " +str(guess) + " guess higher"
        print "You have " +str(guesses) + " guesses left"
        print ""
    if guesses == 0:
        print "You ran out of guesses, the secret was " +str(secret)
        print ""
        init()


# create frame
frame = simplegui.create_frame("Guess The Number!", 200, 200)

# register event handlers for control elements
frame.add_button("Range [0, 100)", range100, 125)
frame.add_button("Range [0, 1000)", range1000, 125)
frame.add_input("Enter your guess here and press enter", input_guess, 125)

# start frame
frame.start()
init()

# I know my code is not the best, constructive criticisim in order to help me
# be a better coder is appreciated :)

這是我剛運行的示例輸出。 我guess_count順序打印出secret ， guess_count和guesses 。

71
0
0
You guessed 25 guess higher
You have -1 guesses left

71
1
-1
You guessed 25 guess higher
You have -2 guesses left

71
2
-2
You guessed 25 guess higher
You have -3 guesses left

當按下按鈕時，由於未重置計數，看起來init（）也不起作用，這會刮傷頭部。

Answer 1

如果添加行

print repr(guess), type(guess), repr(secret), type(secret)
print guess == secret, guess > secret, guess < secret

就在if分支之前，您會看到（類似）：

'23' <class 'str'> 4 <class 'int'>
False False False

您正在將字符串與整數進行比較，這在Python 3中會給出TypeError: unorderable types: str() < int()但在Python 2中，它將無提示地返回意外行為（如果有內存，則基於類的名稱，但是因為我們無論如何都不應該這樣做，所以我永遠都不會記住細節。）要具體：

>>> "47" < 200
False
>>> "47" < 47
False
>>> "47" < 2
False
>>> 100 < "23"
True
>>> 100 < "1"
True
>>> 100 < "-23"
True

將用戶輸入轉換為整數，然后就可以開始處理下一個問題了：^）

You guessed 5
5 <class 'int'> 35 <class 'int'>
False False True
You guessed 5 guess higher
You have -1 left