我正在尝试将一个图形连接到一个日期选择器。然而,在尝试连接图形和日期选择器时,我一直遇到一个问题。我有以下代码:
import dash
import dash_bootstrap_components as dbc
import dash_core_components as dcc
import dash_html_components as html
from dash.dependencies import Input, Output, State
from datetime import datetime
import plotly.graph_objs as go
import plotly.express as px
controls = dbc.FormGroup(
[
html.P('Pick Date', style={
'textAlign': 'center'
}),
dcc.DatePickerRange(
id = "date-picker",
start_date = datetime(2021,1,1),
end_date = datetime.today(),
display_format='MMMM Y, DD'
),
html.Br(),
dbc.Button(
id='submit_button',
n_clicks=0,
children='Submit',
color='primary',
block=True
),
]
)
content_second_row = dbc.Row(
[
dbc.Col(
dcc.Graph(id='graph_2'), md=4
)
]
)
@app.callback(
Output('graph_2', 'figure'),
[Input('date-picker', 'start_date'),
Input('date-picker', 'end_date')],
[State('submit_button', 'n_clicks')])
def update_graph_2(n_clicks, start_date, end_date):
fig = {
'data': [{
'x': dfEconomic[(dfEconomic['Date']>start_date)&(dfEconomic['Date']<end_date)],
'y': dfEconomic["Amount [DKK]"],
'type': 'bar'
}]
}
return fig
我尝试使用以下代码将日期值转换为日期框:
for i in range(len(dfEconomic["Date"])):
if isinstance(dfEconomic["Date"][i], str) == True:
dfEconomic["Date"] = datetime.strptime(dfEconomic["Date"][i], "%Y-%m-%d")
但这无助于形势的发展。我收到以下错误消息:
TypeError: invalid type comparison
有人能帮我理解什么需要改变吗
pd.to_datetime()
将字符串值转换为datetime64[ns]
。创建了一个列表,可以用作*args
到between()
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