pip install pandaspip install xlrd

大量记录的时候，用EXCEL排序处理比较费劲，EXCEL程序动不动就无响应了，用pands完美解决。

# We will use data structures and data analysis tools provided in Pandas libraryimport pandas as pd# Import retail sales data from an Excel Workbook into a data frame# path = '/Documents/analysis/python/examples/2015sales.xlsx'path = 'F:/python/an.xlsx'xlsx = pd.ExcelFile(path)df = pd.read_excel(xlsx, 'Sheet1')# Let's add a new boolean column to our dataframe that will identify a duplicated order line item (False=Not a duplicate; True=Duplicate)df['is_duplicated'] = df.duplicated(['ip'])# We can sum on a boolean column to get a count of duplicate order line items# df['is_duplicated'].sum()# Get the records of duplicated, If you need non-dup just use False insteaddf_dup = df.loc[df['is_duplicated'] == True]# Finally let's save our cleaned up data to a csv filedf_dup.to_csv('dup.csv', encoding='utf-8')

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