Python 将字符串转换为 int 的简单方法
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Short way to convert string to int
提问by Sam Banks
I usually do this to convert string to int:
我通常这样做是为了将字符串转换为 int：
my_input = int(my_input)
but I was wondering if there was a less clumsy way, because it feels kind of long.
但我想知道是否有一种不那么笨拙的方式，因为感觉有点长。
回答by Gonzalo
回答by biocyberman
Maybe you were hoping for something like my_number = my_input.to_int. But it is not currently possible to do it natively. And funny enough, if you want to extract the integer part from a float-like string, you have to convert to floatfirst, and then to int. Or else you get ValueError: invalid literal for int().
也许你希望得到类似的东西my_number = my_input.to_int。但目前无法在本地进行。有趣的是，如果你想从一个类似浮点数的字符串中提取整数部分，你必须先转换为float，然后转换为int。否则你得到ValueError: invalid literal for int().
The robust way:
健壮的方法：
my_input = int(float(my_input))
For example:
例如：
>>> nb = "88.8"
>>> int(nb)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: invalid literal for int() with base 10: '88.8'
>>> int(float(nb))
88
回答by Jan Meeuwissen
If it is user input, chances are the user inputted a string. So better catch the exception as well with try:
如果是用户输入，则很可能是用户输入了一个字符串。所以更好地捕捉异常以及try：
user_input = '88.8'
try:
user_input = int(float(user_input))
except:
user_input = 0
print(user_input)
