Convert DataFrame string complex i to j python // “Cloning” row or column vectors

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Convert DataFrame string complex i to j python // “Cloning” row or column vectors

https://stackoverflow.com/questions/30808286/convert-dataframe-string-complex-i-to-j-python https://stackoverflow.com/questions/1550130/cloning-row-or-column-vectors If you have a string like this: complexStr = "0.015291+0.0075383i", you could d…

How to convert a QString to unicode object in python 2?

How to convert a QString to unicode object in python 2? I had this problem to solve, and I tried to find the safest way. This program illustrates the solution from PyQt4 import QtCore, QtGui import sys app = QtGui.QApplication(sys.argv) ed = QtGui.QL…

Convert.ToInt32(string '000000003') 变成了 3

Convert.ToInt32(string '000000003') 变成了 3 但是在查询的时候需要用的是string 这里的convert.toint32 反而起了坏作用,不是所有的时候都要用convert, public int InvalidEntry(FormCollection collection) { int startNumber = Convert.ToInt32(collection["StartNumber"]); int endNumber = Conver…

Convert a string into an ArrayBuffer

https://github.com/mdn/dom-examples/blob/master/web-crypto/import-key/spki.js How to convert ArrayBuffer to and from String | Web https://developers.google.com/web/updates/2012/06/How-to-convert-ArrayBuffer-to-and-from-String ArrayBuffers are used…

Mysql新建表，插入中文时报错“Incorrect string value: '\xE4\xBD\xA0\xE5\xA5\xBD' for column”问题

有时候我们在往数据库中输入信息时,如果输入的内容是中文,会报错“Incorrect string value: '\xE4\xBD\xA0\xE5\xA5\xBD' for column”. 例如: CREATE TABLE test(ID INT PRIMARY KEY AUTO_INCREMENT , test_name VARCHAR(20) , test_num INT); /*建…

java.sql.SQLException: Incorrect string value: '\xF0\x9F\x9A\x80\xF0\x9F...' for column 'name' at row 1

1.异常提示: 12:59:10.000 [http-nio-8080-exec-40] DEBUG o.s.j.s.SQLStateSQLExceptionTranslator - Extracted SQL state class 'HY' from value 'HY000' 12:59:10.000 [http-nio-8080-exec-40] DEBUG org.mybatis.spring.SqlSessionUtils - Closing non transactional Sq…

mysql插入报错：java.sql.SQLException: Incorrect string value: '\xE6\x9D\xAD\xE5\xB7\x9E...' for column 'address' at row 1

界面报错: 日志报错: java.sql.SQLException: Incorrect at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:) ~[mysql-connector-java-.jar:] at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:) ~[mysql-connector-java-…