Python：声明为整数和字符
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Python: Declare as integer and character
提问by John
# declare score as integer
score = int
# declare rating as character
rating = chr
# write "Enter score: "
# input score
score = input("Enter score: ")
# if score == 10 Then
# set rating = "A"
# endif
if score == 10:
rating = "A"
print(rating)
When I execute this code and enter "10" I get, built-in function chr, in the shell. I want it to print A, or another character depending on the score. For example if the input score was 8 or 9 it would have to read B. But, I'm trying to get past the first step first. I am new to programming, and if I can get pointed in the right direction that would help a lot.
当我执行此代码并输入“10”时，我在 shell 中得到了内置函数 chr。我希望它根据分数打印 A 或其他字符。例如，如果输入分数是 8 或 9，则必须读取 B。但是，我试图首先通过第一步。我是编程新手，如果我能指出正确的方向，那将大有帮助。
回答by falsetru
# declare score as integer
score = int
# declare rating as character
rating = chr
Above two statement, assigns the function int, chr, not declaring the variable with the default value. (BTW, chris not a type, but a function that convert the code-point value to character)
上面两条语句，赋值给函数int, chr，而不是用默认值声明变量。（顺便说一句，chr不是类型，而是将代码点值转换为字符的函数）
Do this instead:
改为这样做：
score = 0 # or int()
rating = '' # or 'C' # if you want C to be default rating
NOTEscoreis not need to be initialized, because it's assigned by score = input("Enter score: ")
NOTEscore不需要初始化，因为它是由score = input("Enter score: ")
回答by Edward Aung
In python, you can't do static typing (i.e. you can't fix a variable to a type). Python is dynamic typing.
在 python 中，你不能做静态类型（即你不能将变量固定为类型）。Python 是动态类型。
What you need is to force a type to the input variable.
您需要的是强制输入变量的类型。
# declare score as integer
score = '0' # the default score
# declare rating as character
rating = 'D' # default rating
# write "Enter score: "
# input score
score = input("Enter score: ")
# here, we are going to force convert score to integer
try:
score = int (score)
except:
print ('score is not convertable to integer')
# if score == 10 Then
# set rating = "A"
# endif
if score == 10:
rating = "A"
print(rating)
