pandas - Related information

  • How to subtract two dataframe?

    data is the dataframe, of stock data, including the stock symbol and trading date. then I want to eliminate the data that the trading day is less than 15 days per month. the question now is: I have obtained the dataframe2, of less than 15 days per mon...

    Mar.02,2021
  • The meaning of pandas

    import pandas as pd word = pd.read_table ( test.txt , encoding = utf-8 , names = [ query ]) what does the query in the names here mean? header: int, list of ints, default infer Row number (s) to use as the column names, and the s...

    Feb.28,2021
  • How to make two dataframe fill missing values with each other in pandas

    there are two sets of data that make two dataframe, with the same row and column tags want to know how to get two dataframe to fill the missing values with each other. ...

    Feb.27,2021
  • UnicodeDecodeError: 'utf-8' codec can't decode byte 0xaa

    how to deal with decoding errors when reading files? ...

    Feb.27,2021
  • Pandas's dataframe condition Filter performance Optimization?

    currently I have a piece of code that spends most of its time on the above two sentences of data filtering in dataframe. temp_df = df [df [ "data_date "] .isin (date_list)] temp = temp_df [rule [2]] [temp_df [ "data_date "] = = d] at present, it tak...

    Feb.26,2021
  • MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
    MySQL Error : Disk full (/tmp/#sql-temptable-64f5-7c10ec-1df27.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
    MySQL Errno : 1021
    Message : Disk full (/tmp/#sql-temptable-64f5-7c10ec-1df27.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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