[英]Print statements not working in if/elif/else block
我有一个我要重做的项目。 这是一门有关交互式Python编程的课程。 提交的截止日期已经过去,所以我在这里没有违反荣誉代码,只是想了解为什么我现在为同一项目使用的代码无法正常工作。
游戏是猜数字。 if块中的所有print语句都根本不会打印出来,我当然认为应该打印出来。 在评估阶段,我已经完成了其他几个学生项目,但是仍然看不到我的代码为什么不正确。
游戏在浏览器中执行此游戏在浏览器中点击这里
这是我正在使用的代码:
# 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 :)
这是我刚运行的示例输出。 我guess_count
顺序打印出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
当按下按钮时,由于未重置计数,看起来init()也不起作用,这会刮伤头部。
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,您会看到(类似):
'23' <class 'str'> 4 <class 'int'>
False False False
您正在将字符串与整数进行比较,这在Python 3中会给出TypeError: unorderable types: str() < int()
但在Python 2中,它将无提示地返回意外行为(如果有内存,则基于类的名称,但是因为我们无论如何都不应该这样做,所以我永远都不会记住细节。)要具体:
>>> "47" < 200
False
>>> "47" < 47
False
>>> "47" < 2
False
>>> 100 < "23"
True
>>> 100 < "1"
True
>>> 100 < "-23"
True
将用户输入转换为整数,然后就可以开始处理下一个问题了:^)
You guessed 5
5 <class 'int'> 35 <class 'int'>
False False True
You guessed 5 guess higher
You have -1 left
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.