pandas slice columns

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[Python] Slice the data with pandas

For example we have the dataframe like this: SPY AAPL IBM GOOG GLD2017-01-03 222.073914 114.311760 160.947433 786.140015 110.4700012017-01-04 223.395081 114.183815 162.940125 786.900024 110.8600012017-01-05 223.217606 114.764473 162.401047 794.020020 112.5800022017-01-06 224.016220 116.043915 163.200043 806.150024 111.7500002017-01-09 223.276779 117.106812 161.390244 806.650024 112.669998...Now we only we want to get highli

In python, pandas. DataFrame sums rows and columns and adds the new row and column sample code.

Pandas is the most famous data statistics package in the python environment, while DataFrame is translated as a data frame, which is a data organization method. This article mainly introduces pandas in python. dataFrame sums rows and columns and adds new rows and columns. the detailed sample code is provided in this ar

Pandas Dataframe method for deleting rows or columns

Pandas dataframe the additions and deletions of the summary series of articles: How to create Pandas Daframe Query method of Pandas Dataframe Pandas Dataframe method for deleting rows or columns Modification method of

Pandas data processing based on filtering specified rows or columns

This article mainly introduces the pandas data processing basis to filter the specified row or the specified column of the relevant information, the need for friends can refer to the following The main two data structures of Pandas are: series (equivalent to one row or column of data bodies) and dataframe (a tabular data body equivalent to multiple rows and columns

Python uses pandas and xlrd to read Excel, feature filtering deletes columns with 0 values over 99%

Using XLRD to read ExcelFilter 0 columns with a value greater than 99% and removeImport XlrdWorkbook=xlrd.open_workbook (R "123.xlsx")Table = Workbook.sheet_by_name (' Sheet1 ')Nrows=table.nrowsNcols=table.ncolsDel_col=[]For j in Range (Ncols):sum = 0For Ai in table.col_values (j):if ai = = 0.0:Sum+=1if float (sum)/nrows>=0.99:Del_col.append (j)print Del_col Using Pandas to read Exc

Python uses pandas and xlrd to read excel files, feature filtering columns, and pandasxlrd

Python uses pandas and xlrd to read excel files, feature filtering columns, and pandasxlrd Use xlrd to read excelFilter and delete columns with 0 values over 99%.Import xlrdWorkbook = xlrd. open_workbook (R "123.xlsx ")Table = workbook. sheet_by_name ('Sheet1 ')Nrows = table. nrowsNcols = table. ncolsDel_col = []For j in range (ncols ):Sum = 0For ai in t

Pandas method for filtering data by combination criteria of a number of columns

This article mainly introduces the method of pandas to filter data according to the combination condition of several columns, has certain reference value, now share to everybody, the need friend can refer to Or do you speak with a picture? A file: For example, I would like to filter out "design Wells", "put into production Wells", "current well" three columns o

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