我正在Python中使用熊猫库从csv文件读取并填充下拉列表。我的应用程序使用Dash Plotly创建HTML Web界面。我只填写了下拉列表的值,下拉列表的标签与这些值相同。如何将标签更改为csv文件中的文本?
available_rpi.csv
ip,name
192.168.1.6,"Virtual I²C (192.168.1.6)"
192.168.1.102,"GPS UART (192.168.1.102)"
192.168.1.106,"Ultrasonic I²C (192.168.1.103)"
python脚本:
import dash,requests,pandas as pd
df = pd.read_csv('available_rpi.csv', usecols = ['ip','name'])
available_rpi = df['ip'].unique()
app.layout = html.Div( [
html.H1(children='RESENSE'),
html.Div(children='''RESENSE: Transparent Record and Replay in the Internet of Things (IoT).'''),
# html.Div(['Name : ', dcc.Input(id='input',value='ACC',type='text') ]),
# dcc.Markdown(''' '''),
html.Label('Raspberry Pi'),
dcc.Dropdown(
id = "input",
options=[{'label': i, 'value': i} for i in available_rpi],
value=''
),
html.Div(id='output'),
# Graph for arriving data (static)
dcc.Graph(id='data', animate=True),
dcc.Interval(id='graph-update',interval=2*1000)
])
答案 0 :(得分:0)
您应该使用orient='records'
将.csv文件存储为词典列表,然后使用列表推导为Dropdown组件设置选项:
import dash
import pandas as pd
import dash_core_components as dcc
import dash_html_components as html
available_rpi = pd.read_csv('available_rpi.csv').to_dict(orient='records')
app = dash.Dash(__name__)
app.layout = html.Div([
html.H1(children='RESENSE'),
html.Div(children='''RESENSE: Transparent Record and Replay in the Internet of Things (IoT).'''),
html.Label('Raspberry Pi'),
dcc.Dropdown(
id = "input",
options=[{'label': i['name'], 'value': i['ip']} for i in available_rpi],
value=''
),
html.Div(id='output'),
#Graph for arriving data (static)
dcc.Graph(id='data', animate=True),
dcc.Interval(id='graph-update',interval=2*1000)
])
if __name__ == '__main__':
app.run_server()
答案 1 :(得分:0)
我必须使用字典。
available_rpi = pd.read_csv('available_rpi.csv', header=None, dtype={0: str}).set_index(0).squeeze().to_dict()
#print("Raspberry Pi's available:")
#for key, car in available_rpi.items():
# print('{} : {}'.format(key, car))
app.layout = html.Div( [
html.H1(children='RESENSE'),
html.Div(children='''RESENSE: Transparent Record and Replay in the Internet of Things (IoT).'''),
# html.Div(['Name : ', dcc.Input(id='input',value='ACC',type='text') ]),
# dcc.Markdown(''' '''),
html.Label('Raspberry Pi'),
dcc.Dropdown(
id = "input",
options=[{'label': v, 'value': k} for k, v in available_rpi.items()],
value=''
),
html.Div(id='output'),
# Graph for arriving data (static)
dcc.Graph(id='data', animate=True),
dcc.Interval(id='graph-update',interval=2*1000)
])
答案 2 :(得分:0)
如何用熊猫读取CSV数据并将其存储在字典中呢?
import dash
import pandas as pd
import dash_core_components as dcc
import dash_html_components as html
df = pd.read_csv('available_rpi.csv', usecols = ['ip','name'])
available_rpi = df.to_dict('records')
app = dash.Dash(__name__)
app.layout = html.Div( [
html.H1(children='RESENSE'),
html.Div(children='''RESENSE: Transparent Record and Replay in the Internet of Things (IoT).'''),
# html.Div(['Name : ', dcc.Input(id='input',value='ACC',type='text') ]),
# dcc.Markdown(''' '''),
html.Label('Raspberry Pi'),
dcc.Dropdown(
id = "input",
options=[{'label': i['name'], 'value': i['ip']} for i in available_rpi],
value=''
),
html.Div(id='output'),
# Graph for arriving data (static)
dcc.Graph(id='data', animate=True),
dcc.Interval(id='graph-update',interval=2*1000)
])
if __name__ == '__main__':
app.run_server()