I have the following Dataframe with MultiIndex rows in pandas.
time available_slots status
month day
1 1 10:00:00 1 AVAILABLE
1 12:00:00 1 AVAILABLE
1 14:00:00 1 AVAILABLE
1 16:00:00 1 AVAILABLE
1 18:00:00 1 AVAILABLE
2 10:00:00 1 AVAILABLE
... ... ... ...
2 28 12:00:00 1 AVAILABLE
28 14:00:00 1 AVAILABLE
28 16:00:00 1 AVAILABLE
28 18:00:00 1 AVAILABLE
28 20:00:00 1 AVAILABLE
And I need to transform it to a hierarchical nested JSON as this:
[
{
"month": 1,
"days": [
{
"day": 1,
"slots": [
{
"time": "10:00:00",
"available_slots": 1,
"status": "AVAILABLE"
},
{
"time": "12:00:00",
"available_slots": 1,
"status": "AVAILABLE"
},
...
]
},
{
"day": 2,
"slots": [
...
]
}
]
},
{
"month": 2,
"days":[
{
"day": 1,
"slots": [
...
]
}
]
},
...
]
Unfortunately, it is not as easy as doing df.to_json(orient="index")
.
Does anyone know if there is a method in pandas to perform this kind of transformations? or in what way I could iterate over the DataFrame to build the final object?
CodePudding user response:
Here's one way. Basically repeated groupby
apply(to_dict)
reset_index
until we get the desired shape:
out = (df.groupby(level=[0,1])
.apply(lambda x: x.to_dict('records'))
.reset_index()
.rename(columns={0:'slots'})
.groupby('month')
.apply(lambda x: x[['day','slots']].to_dict('records'))
.reset_index()
.rename(columns={0:'days'})
.to_json(orient='records', indent=True)
)
Output:
[
{
"month":1,
"days":[
{
"day":1,
"slots":[
{
"time":"10:00:00",
"available_slots":1,
"status":"AVAILABLE"
},
{
"time":"12:00:00",
"available_slots":1,
"status":"AVAILABLE"
},
{
"time":"14:00:00",
"available_slots":1,
"status":"AVAILABLE"
},
{
"time":"16:00:00",
"available_slots":1,
"status":"AVAILABLE"
},
{
"time":"18:00:00",
"available_slots":1,
"status":"AVAILABLE"
}
]
},
{
"day":2,
"slots":[
{
"time":"10:00:00",
"available_slots":1,
"status":"AVAILABLE"
}
]
}
]
},
{
"month":2,
"days":[
{
"day":28,
"slots":[
{
"time":"12:00:00",
"available_slots":1,
"status":"AVAILABLE"
},
{
"time":"14:00:00",
"available_slots":1,
"status":"AVAILABLE"
},
{
"time":"16:00:00",
"available_slots":1,
"status":"AVAILABLE"
},
{
"time":"18:00:00",
"available_slots":1,
"status":"AVAILABLE"
},
{
"time":"20:00:00",
"available_slots":1,
"status":"AVAILABLE"
}
]
}
]
}
]
CodePudding user response:
You can use a double loop for each level of your index:
data = []
for month, df1 in df.groupby(level=0):
data.append({'month': month, 'days': []})
for day, df2 in df1.groupby(level=1):
data[-1]['days'].append({'day': day, 'slots': df2.to_dict('records')})
Output:
import json
print(json.dumps(data, indent=2))
[
{
"month": 1,
"days": [
{
"day": 1,
"slots": [
{
"time": "10:00:00",
"available_slots": 1,
"status": "AVAILABLE"
},
{
"time": "12:00:00",
"available_slots": 1,
"status": "AVAILABLE"
},
{
"time": "14:00:00",
"available_slots": 1,
"status": "AVAILABLE"
},
{
"time": "16:00:00",
"available_slots": 1,
"status": "AVAILABLE"
},
{
"time": "18:00:00",
"available_slots": 1,
"status": "AVAILABLE"
}
]
},
{
"day": 2,
"slots": [
{
"time": "10:00:00",
"available_slots": 1,
"status": "AVAILABLE"
}
]
}
]
},
{
"month": 2,
"days": [
{
"day": 28,
"slots": [
{
"time": "12:00:00",
"available_slots": 1,
"status": "AVAILABLE"
},
{
"time": "14:00:00",
"available_slots": 1,
"status": "AVAILABLE"
},
{
"time": "18:00:00",
"available_slots": 1,
"status": "AVAILABLE"
},
{
"time": "20:00:00",
"available_slots": 1,
"status": "AVAILABLE"
}
]
}
]
}
]