Hi, I am new to python and plotly. I am trying to use plotly.express timeline to draw process event durations.
A simple test like the following python code allows me to draw my basic requirement:
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import plotly.express as px
import pandas as pd
df = pd.DataFrame([
dict(Task=“Wk1”, Start=‘2.1’, End=‘5.5’, Category=‘Group1’),
dict(Task=“Wk2”, Start=‘5.5’, End=‘10.0’, Category=‘Group1’),
dict(Task=“Wk3”, Start=‘22.3’, End=‘28.9’, Category=‘Group1’),
dict(Task=“Wk4”, Start=‘12.6’, End=‘14.0’, Category=‘Group2’),
dict(Task=“Wk5”, Start=‘14.0’, End=‘18.3’, Category=‘Group2’),
dict(Task=“Wk6”, Start=‘18.3’, End=‘20.8’, Category=‘Group2’)
])
df[‘Start’] = pd.to_datetime(df[‘Start’], unit=‘s’)
df[‘End’] = pd.to_datetime(df[‘End’], unit=‘s’)
fig = px.timeline(df, x_start=‘Start’, x_end=‘End’, y=‘Category’, color=‘Task’)
fig.show()
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where each work start time and end time are logged in microseconds (us). However, if I change the pd.to_datetime unit to ‘us’, only a blank graph will show, without any process bar showing.
It looks like in pd.DataFrame, the datetime type is datetime64[ns], which I assume can be accurate to ‘ns’. How can I show a timeline bar in ‘us’ in plotly graph?
Thanks for help!
