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# http://pbpython.com/excel-file-combine.html
    
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import datetime
import pandas as pd
    
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df = pd.read_excel('/Users/copelco/Desktop/PIALog_16-0806.xlsx', sheetname=[0,1,2])
    
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df[1].columns = df[0].columns
df[2].columns = df[0].columns
stops = df[0].append(df[1], ignore_index=True)
stops = stops.append(df[2], ignore_index=True)
    
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len(stops.index)
    
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stops.AGENCY.value_counts()
    
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# covert datetime column
stops['datetime'] = pd.to_datetime(stops['STOPDATE'])
    
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stops.dtypes
    
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years = stops['datetime'].map(lambda x: x.year)
stops.groupby(years)['datetime'].count()
    
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stops.groupby([years, stops.ETHNICITY])['ETHNICITY'].count()
    
    Out[132]:
2012 looks messy ^^
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stops.groupby([years, stops.SEIZED])['SEIZED'].count()
    
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stops.groupby([years, stops.STOPOUTCOME])['STOPOUTCOME'].count()
    
    Out[136]:
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BACOPD = stops.AGENCY == 'BACOPD'
    
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stops[BACOPD].groupby(years)['datetime'].count()
    
    Out[137]:
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