File "E:\python-3.7.0\lib\site-packages\flask\app.py", line 2525, in wsgi_app response = self.full_dispatch_request() File "E:\python-3.7.0\lib\site-packages\flask\app.py", line 1822, in full_dispatch_request rv = self.handle_user_exception(e) File "E:\python-3.7.0\lib\site-packages\flask\app.py", line 1820, in full_dispatch_request rv = self.dispatch_request() File "E:\python-3.7.0\lib\site-packages\flask\app.py", line 1796, in dispatch_request return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args) File "C:/Users/DELL/Desktop/python_flask-dc/python_flask/app.py", line 1160, in echarts 'name': row['name'], TypeError: 'D_huaxue' object is not subscriptable 127.0.0.1 - - [01/Jun/2023 12:16:40] "GET /echarts HTTP/1.1" 500 -
时间: 2023-09-10 10:05:33 浏览: 50
这是一个 Flask 应用程序的错误信息,看起来是在访问 `echarts` 路由时发生了异常。具体来说,`'D_huaxue' object is not subscriptable` 这个错误表示试图对一个不支持下标操作的对象进行下标操作,很可能是在尝试访问一个字典或列表中不存在的键或索引。你需要检查代码中相关的变量和数据是否正确,并确保访问它们时不会出现越界等错误。另外,你可以在 Flask 应用程序中添加调试模式来更好地了解问题所在。
相关问题
Traceback (most recent call last): File "C:/Users/DELL/Desktop/python_flask-dc/python_flask/bpnn_tf.py", line 106, in <module> last_three = column.str[-3:] File "E:\python-3.7.0\lib\site-packages\pandas\core\generic.py", line 5137, in __getattr__ return object.__getattribute__(self, name) File "E:\python-3.7.0\lib\site-packages\pandas\core\accessor.py", line 187, in __get__ accessor_obj = self._accessor(obj) File "E:\python-3.7.0\lib\site-packages\pandas\core\strings.py", line 2100, in __init__ self._inferred_dtype = self._validate(data) File "E:\python-3.7.0\lib\site-packages\pandas\core\strings.py", line 2157, in _validate raise AttributeError("Can only use .str accessor with string values!") AttributeError: Can only use .str accessor with string values!Traceback (most recent call last): File "C:/Users/DELL/Desktop/python_flask-dc/python_flask/bpnn_tf.py", line 106, in <module> last_three = column.str[-3:] File "E:\python-3.7.0\lib\site-packages\pandas\core\generic.py", line 5137, in __getattr__ return object.__getattribute__(self, name) File "E:\python-3.7.0\lib\site-packages\pandas\core\accessor.py", line 187, in __get__ accessor_obj = self._accessor(obj) File "E:\python-3.7.0\lib\site-packages\pandas\core\strings.py", line 2100, in __init__ self._inferred_dtype = self._validate(data) File "E:\python-3.7.0\lib\site-packages\pandas\core\strings.py", line 2157, in _validate raise AttributeError("Can only use .str accessor with string values!") AttributeError: Can only use .str accessor with string values!
这个错误信息是由于你使用了`pandas`库中的`str`属性,但是该属性只能用于字符串类型的数据,而你传入的数据类型不是字符串类型,导致报错。
解决方法:
1. 检查你传入的数据类型是否正确。如果不是字符串类型,则需要将其转换为字符串类型。
2. 如果你的数据类型是`pandas`的`Series`类型,可以使用`astype()`函数将其转换为字符串类型,例如:
``` python
import pandas as pd
# 将数字类型的Series转换为字符串类型
s = pd.Series([1, 2, 3])
s = s.astype(str)
```
3. 如果你的数据类型是`pandas`的`DataFrame`类型,可以使用`apply()`函数将其每一列转换为字符串类型,例如:
``` python
import pandas as pd
# 将数字类型的DataFrame每一列转换为字符串类型
df = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6]})
df = df.apply(lambda x: x.astype(str))
```
4. 如果你的数据类型是列表类型,则可以使用列表推导式将其转换为字符串类型,例如:
``` python
# 将数字类型的列表转换为字符串类型
a = [1, 2, 3]
a = [str(i) for i in a]
```
class D_huaxue(db.Model): __tablename__ = 'd_huaxue' id = db.Column(db.Integer, primary_key=True) name = db.Column(db.String(100), nullable=False) longitude = db.Column(db.Float, nullable=False) latitude = db.Column(db.Float, nullable=False)@app.route('/echarts',methods=['GET']) def echarts(): if request.method == 'GET': query_result =D_huaxue.query.filter() context = { 'query_result': query_result } data = [] for row in query_result: data.append({ 'name': row['name'], 'value': [row['longitude'], row['latitude']], 'symbolSize': 15, 'itemStyle': {'color': 'blue'} }) return render_template('地图2.html')File "E:\python-3.7.0\lib\site-packages\flask\app.py", line 2525, in wsgi_app response = self.full_dispatch_request() File "E:\python-3.7.0\lib\site-packages\flask\app.py", line 1822, in full_dispatch_request rv = self.handle_user_exception(e) File "E:\python-3.7.0\lib\site-packages\flask\app.py", line 1820, in full_dispatch_request rv = self.dispatch_request() File "E:\python-3.7.0\lib\site-packages\flask\app.py", line 1796, in dispatch_request return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args) File "C:/Users/DELL/Desktop/python_flask-dc/python_flask/app.py", line 1160, in echarts 'name': row['name'], TypeError: 'D_huaxue' object is not subscriptable 127.0.0.1 - - [01/Jun/2023 12:16:40] "GET /echarts HTTP/1.1" 500 -
问题出在 `for` 循环中的 `row` 对象上。在 Flask 中,查询结果返回的是一个对象而不是字典,因此你不能像字典一样对其进行下标操作。你需要使用对象属性来获取相应的值,例如 `row.name` 代替 `row['name']`,`row.longitude` 代替 `row['longitude']`,以此类推。修改代码如下:
```
if request.method == 'GET':
query_result = D_huaxue.query.filter()
data = []
for row in query_result:
data.append({
'name': row.name,
'value': [row.longitude, row.latitude],
'symbolSize': 15,
'itemStyle': {'color': 'blue'}
})
context = {
'query_result': query_result,
'data': data
}
return render_template('地图2.html', **context)
```
同时,你需要将 `data` 变量包含在 `context` 字典中,并在渲染模板时将其传递给模板,以便在模板中可以使用这个变量。