对于这个问题，我想是从falling_distance函数取回电表。我似乎无法获得变量d的计算结果。它只是给我这些我从未见过的字母和数字，这是我的代码：
gravity = 9.8
def falling_distance(fall):
d = (1/2) * gravity * (fall**2)
return distance
def main():
print('Seconds\tDistance')
print('------------------')
for sec in range(1, 11):
print(sec,'\t', falling_distance)
main()
输出：
Seconds Distance
------------------
1 <function falling_distance at 0x7f04ab566c80>
2 <function falling_distance at 0x7f04ab566c80>
3 <function falling_distance at 0x7f04ab566c80>
答案 0 :(得分：4)
您从未调用过函数-而是打印了 function 值，该值是Python对象引用。
epsiloni您还必须返回计算出的值-使用 <input id="fileinput" name="arquivo[]" type="file" multiple="multiple" onchange="FileDetails()"/>
<var id="file_List"></var>
<button type="button" onclick="Click()">Click Me!</button>
<script
src="https://code.jquery.com/jquery-3.3.1.js"
integrity="sha256-2Kok7MbOyxpgUVvAk/HJ2jigOSYS2auK4Pfzbm7uH60="
crossorigin="anonymous"></script>
<script>
// simple routine to put content of file input files into memory
G_Array = [];
G_Cont_Upload = 0;
function Click()
{
var a = 1; // this is only to check the content of global variable as google chrome does not stop inside f_ReadFile
}
function FileDetails()
{
var file_arr = [];
if (typeof (FileReader) != "undefined")
{
var files = $('#fileinput')[0].files;
var reader = [];
for (var i = 0; i < files.length; i++)
{
var FileDet = files[i];
var name = FileDet.name;
var Size = FileDet.size;
var Obj = {Name: FileDet.name, SizeInicial : FileDet.size};
G_Array.push(Obj);
reader[i] = new FileReader();
function f_ReadFile(e)
{
var content = e.target.result;
G_Array[G_Cont_Upload].SizeAtual = content.length;
G_Array[G_Cont_Upload].Content = content; // content base 64
G_Cont_Upload++;
}
reader[i].onload = f_ReadFile;
reader[i].readAsDataURL(FileDet);
}
}
else
{
alert("This browser does not support HTML5 FileReader.");
}
}
</script>
</body>
或Traceback (most recent call last):
File "e:\venvs\django_tutorial_venv\lib\site-packages\django\utils\module_loading.py", line 20, in import_string
return getattr(module, class_name)
AttributeError: module 'django.contrib.auth.password_validation' has no attribute ' UserAttributeSimilarityValidator'
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "e:\venvs\django_tutorial_venv\lib\site-packages\django\contrib\auth\password_validation.py", line 26, in get_password_validators
klass = import_string(validator['NAME'])
File "e:\venvs\django_tutorial_venv\lib\site-packages\django\utils\module_loading.py", line 24, in import_string
) from err
ImportError: Module "django.contrib.auth.password_validation" does not define a " UserAttributeSimilarityValidator" attribute/class
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "manage.py", line 15, in <module>
execute_from_command_line(sys.argv)
File "e:\venvs\django_tutorial_venv\lib\site-packages\django\core\management\__init__.py", line 381, in execute_from_command_line
utility.execute()
File "e:\venvs\django_tutorial_venv\lib\site-packages\django\core\management\__init__.py", line 375, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "e:\venvs\django_tutorial_venv\lib\site-packages\django\core\management\base.py", line 316, in run_from_argv
self.execute(*args, **cmd_options)
File "e:\venvs\django_tutorial_venv\lib\site-packages\django\contrib\auth\management\commands\createsuperuser.py", line 59, in execute
return super().execute(*args, **options)
File "e:\venvs\django_tutorial_venv\lib\site-packages\django\core\management\base.py", line 353, in execute
output = self.handle(*args, **options)
File "e:\venvs\django_tutorial_venv\lib\site-packages\django\contrib\auth\management\commands\createsuperuser.py", line 163, in handle
validate_password(password2, self.UserModel(**fake_user_data))
File "e:\venvs\django_tutorial_venv\lib\site-packages\django\contrib\auth\password_validation.py", line 44, in validate_password
password_validators = get_default_password_validators()
File "e:\venvs\django_tutorial_venv\lib\site-packages\django\contrib\auth\password_validation.py", line 19, in get_default_password_validators
return get_password_validators(settings.AUTH_PASSWORD_VALIDATORS)
File "e:\venvs\django_tutorial_venv\lib\site-packages\django\contrib\auth\password_validation.py", line 29, in get_password_validators
raise ImproperlyConfigured(msg % validator['NAME'])
django.core.exceptions.ImproperlyConfigured: The module in NAME could not be imported: django.contrib.auth.password_validation. UserAttributeSimilarityValidator. Check your AUTH_PASSWORD_VALIDATORS setting.
。经过这两个更改，您的程序可以很好地运行：
for sec in range(1, 11):
print(sec,'\t', falling_distance(sec))