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Redistricting of district-indexed tables

Project description

# pandas-redistrict

Uses data on redistricting to apply redistricting to older datasets to represent the districts in their current state.

Supports merging and splitting of districts:
- Merged districts are summed up under new identifier
- Split districts are distributed by population-based ratio.

Data on redistricting is in `data/` directory. Currently only available for German *Kreise* (containing reforms in NRW, Sachsen, Sachsen-Anhalt and Mecklenburg-Vorpommern).


``` python
>>> df # Values of indexed by German district identifiers
value1 value2
AGS
05354 4 5
05313 5 6
05334 6 7
15154 8 9
15159 10 11
15151 12 13
15082 13 14

>>> # Port old identifiers to new versions. Sum and distribute values on the way
>>> from redistrict import redistrict
>>> redistrict(df, 'de/kreise', drop=True, splits=True)
value1 value2
AGS
05334 15.00 18.00
15001 2.40 2.60
15082 35.44 38.81
15086 0.96 1.04
15091 4.20 4.55
```

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