Python

python Missing value processing fillna mean value _Python Processing missing values

First create a with missing values NaN(Not A Number) of CSV(comma-separated values) file ：import pandas as pdfrom io import StringIOcsv_data = """...
2020-12-23 21:29 views 27

【Python】 Make up the missing date

have DataFrame Type data data, Among them index List as date , have other value column , Supplement missing date column index The code is as follo...
2020-12-21 20:03 views 22

Python Write and read Excel Tabular data

Python As a powerful data processing tool , Here is a brief introduction python Read write excel Tabular data . one ,python write in excel Table im...
2020-12-21 12:27 views 17

python How to judge the case of letters in _python Judge case letters

How to judge python Is the first letter of the string lowercase ? Convert initials to corresponding AscII Code comparison str1 = "Hello python"pri...
2020-12-20 05:40 views 33

python implement mysql Multiple sql sentence _mysql -- Execute multiple at a time sql sentence

A software upgrade will be done recently , It involves the changes of database table fields ( Add or delete or modify ), All about database change...
2020-12-18 12:59 views 83

python Game program code Encyclopedia _ Childhood games ,Python One line of code can be achieved !

hello everyone , It's children's Day , Although bald programmers have no hair , But childlike innocence is always there , Share a private one toda...
2020-12-16 12:56 views 22

python remove pdf watermark _ use PyPDF2 remove PDF Watermark in

This Section imports the necessary classes from the PyPDF2 libraryfrom PyPDF2 import PdfFileReader, PdfFileWriterfrom PyPDF2.pdf import ContentStre...
2020-12-06 05:43 views 752

python The simplest account password verification _Python Simple login authentication

First study python, Confused , Write a simple login verification , Take notes username='cc'# user name userpassword='123'# password count=0# Count...
2020-12-05 01:00 views 22

python Built in function Ascending Descending _python Of built-in functions sorted

sorted() belong to python Built in sorting function , It is used to arrange each element of an iteratable object in ascending order ( default ) And...
2020-12-03 14:11 views 30

KeyError: “[‘xxxx‘] not found in axis“

KeyError: “[‘total’] not found in axis” Delete named Total Column code for ：crime.drop('total',inplace=True) report errors ： analysis ：DataFrame.dr...
2020-12-01 11:09 views 282
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