mlessentials/Lab12/Exercise12.01/Exercise12_01.ipynb

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    "import pandas as pd"
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    "file_url = '../Dataset/taxstats2015.csv'"
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    "df['Postcode'].nunique()"
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    "postcode_url = '../Dataset/taxstats2016individual06taxablestatusstateterritorypostcodetaxableincome%20(2).xlsx'"
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    "postcode_df = pd.read_excel(postcode_url, sheet_name='Individuals Table 6B', header=2)"
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    "postcode_df.head()"
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    "merged_df = pd.merge(df, postcode_df, how='left', on='Postcode')"
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    "merged_df['State/ Territory1'].isna().sum()"
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   "source": [
    "merged_df.loc[merged_df['State/ Territory1'].isna(), 'Postcode']"
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