为什么我会收到“AttributeError: 'NoneType' object has no attribute 'get'”

Question

我收到第 10 行代码的错误，我在其中调用条目字符串值，任何帮助表示赞赏，并提前感谢您的帮助。 如果有帮助，这是整个错误：

  File "c:\Users\(MY NAME)\OneDrive\Code\(MY NAME).py", line 38, in verify_license_key
    url = f"https://api.gumroad.com/v2/licenses/verify?product_permalink=ewaqb&license_key={user_license_key.get()}&increment_uses_count=true"
AttributeError: 'NoneType' object has no attribute 'get'

    def verify_license_key():
            verify_license_window.update()
            os.chdir("C:\ProgramData")
            with open("verify.txt", "r") as f:
                contents = f.read()
                verify_license_window.update()
                if contents != "CYAmS$#Rr6fM$AKR9FS@#tXMetqNkzL3HCDYry!j":
                    verify_license_window.update()
                    f.close()
                    url = f"https://api.gumroad.com/v2/licenses/verify?product_permalink=ewaqb&license_key={user_license_key.get()}&increment_uses_count=true"
                    params = {}
                    r = requests.post(url = url, params = params)
                    result = r.json()
                    usesAmount = int(result['uses'])
                    verify_license_window.update()
                    
                    if usesAmount == 1:
                        with open("verify.txt", "w") as f:
                            verify_license_window.update()
                            f.write("CYAmS$#Rr6fM$AKR9FS@#tXMetqNkzL3HCDYry!j")
                            f.close()
                            verify_license_window.update()
                            change_status_verify("Confirmed")
                            verify_license_window.after(1000)
                            verify_license_window.update()
                            change_status_verify("Closing in 1 Second")
                            verify_license_window.after(1000)
                            verify_license_window.update()
                            verify_license_window.destroy()
                
                elif contents == "CYAmS$#Rr6fM$AKR9FS@#tXMetqNkzL3HCDYry!j":
                    f.close()
                    verify_license_window.update()
                    change_status_verify("Program Already Verified")
                    verify_license_window.after(1000)
                    verify_license_window.update()
                    change_status_verify("Closing In 1 Second")
                    verify_license_window.after(1000)
                    verify_license_window.destroy()
                    
    
                
        verify_license_window = Tk()
        #settings
        verify_license_window.minsize(300,200)
        verify_license_window.maxsize(300,200)
        verify_license_window.title("Verify License Key")
    
        #button
        Button(verify_license_window, padx=12, pady=12, text="Confirm",
command=verify_license_key).place(x=112, y=100)
    
        #label
        Label(verify_license_window, width=17 ,text="Enter License Key Here:").place(x=25,y=25)
    
        #entry
        user_license_key = Entry(verify_license_window, width=40).place(x=20,y=50)
        
    
        verify_license_window.mainloop()

Answer 1

此错误发生在user_license_key.get() 。 user_license_key在这里是 None 。 请尝试打印出来并检查它的值或类型。 如果user_license_key为 none，则您必须在此字段中提供适当的值。