pip install pandas
pip 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 library
import 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 instead
df_dup = df.loc[df[\'is_duplicated\'] == True]

# Finally let\'s save our cleaned up data to a csv file
df_dup.to_csv(\'dup.csv\', encoding=\'utf-8\')

 ref:https://33sticks.com/python-for-business-identifying-duplicate-data/

 

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