英文:
How to limit the character in Entry
问题
我需要将输入限制为最多5位数字。```pythondef validate(S):try:float(S)return Trueexcept ValueError:messagebox.showerror(message="数据错误，仅限数字。", title="错误")return Falsee1 = tk.Entry(master, validate="key", validatecommand=(master.register(validate), '%S'))
我有这个方法来接收和验证输入，但我想知道如何在输入上设置最多5位数字的限制。
我尝试过使用此问题中使用的方法（https://stackoverflow.com/questions/5446553/tkinter-entry-character-limit），但在validate方法中不起作用。
<details><summary>英文:</summary>I need to limit the entry to a maximum of 5 digits.
def validate(S):
try:
float(S)
return True
except ValueError:
messagebox.showerror(message="Datos erroneos, únicamente números.", title="ERROR")
return False
e1 = tk.Entry(master, validate="key", validatecommand=(master.register(validate), '%S'))
I have this method to receive and validate that it's just numbers at the entry, but i would like to know how can I put a max limit of 5 digits on the entry.I tried with the methods used in this question (https://stackoverflow.com/questions/5446553/tkinter-entry-character-limit) but it is not working with the validate method.</details># 答案1**得分**: 3从validate函数中返回False，如果字符串的长度超过5。```pythondef validate(S):try:float(S)return len(S) <= 5except ValueError:messagebox.showerror(message="Datos erroneos, únicamente números.", title="ERROR")return False
英文:
Return False from validate if the length of the string is more than 5.
def validate(S):try:float(S)return len(S) <= 5except ValueError:messagebox.showerror(message="Datos erroneos, únicamente números.", title="ERROR")return False
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